'06-'07 Limit Switches Limit Switches '06-'07 Please contact .......... Matsushita Electric Works, Ltd. Automation Controls Business Unit Head Office: 1048, Kadoma, Kadoma-shi, Osaka 571-8686, Japan Telephone: +81-6-6908-1050 Facsimile: +81-6-6908-5781 http://www.nais-e.com/ All Rights Reserved (c) 2006 COPYRIGHT Matsushita Electric Works, Ltd. ARCT1B272E 200609-1YT Specifications are subject to change without notice. Matsushita Electric Works, Ltd. These materials are printed on ECF pulp. These materials are printed with earth-friendly vegetable-based (soybean oil) ink. Limit Switches ARCT1B272E '06.9 Printed in Japan. Matsushita Electric Works, Ltd. SUBMINIATURE SIZE LIMIT SWITCHES QL (AZ4) Micro Limit Switches High precision micro limit switches with excellent environment proofing Quickly upgraded to limit switches with lamps by mounting an LED lamp socket An exposed terminal type model combined with a socket with cord for the built-in LED lamp (sold separately) easily become a limit switch with lamp. Convenient for maintenance such as operations checks. QL exposed terminal type QL limit with lamp Socket with LED lamp LED lamp L socket type (roller arm) RoHS Directive compatibility information http://www.nais-e.com/ FEATURES 1. Subminiature design The size of the actual unit is approximately 1/10 in the case of the plunger model and approximately 1/6.5 in the case of the arm model, that of the vertical type limit switch. Large-scale miniaturization has been achieved. Ideal for miniaturized machinery designs or highly accurate miniaturized machines. Approx. 1/10 r Plunger model Vertical type QL 2. A lamp can be easily added for operations checks 3. With appropriate O.T. range display The arm model has a convenient appropriate O.T. range display for attachment adjustment work. This should be set so that the operations display board's indicated protrusion winds inside the protrusion on the axle receptor, permitting use under optimum conditions. O.T. exceeded Appropriate range Insufficient O.T. range Appropriate range Operating display board O.T. exceeded 4. Terminal uses both solder and tab (#110) 5. O.P. accuracy of 0.2 (O.P. repeated accuracy initially 0.03) achieved Attachment accuracy improved greatly The plunger model has achieved a high O.P. repeated accuracy of within 0.03mm through the development of a unique switch mechanism and a standard attachment surface on the upper surface of the unit (a surface with no slants.) Also, through a unique mechanism that permits adjustment of the O.P. in each individual product at the time of assem- bly, an O.P. accuracy of 0.2mm .008inch can be safeguarded between lots, so that almost no operating position adjustment is required during either attachment or replacement. 6. A subminiature limit switch with a great stroke margin (O.T./T.T.) The T.T. has been enlarged by using a switching mechanism by coil spring for QL. 7. Long life The unit has a long mechanical life of minimum 107 times and a long electrical life of min. 3 105 times (5A, 250V AC resistance load) by means of a silver alloy contact with excellent solvent-proof characteristics and a guaranteed wiping operation that possesses two hinges and switching method by coil spring. 8. A mechanism with excellent environment proofing * A protective construction equivalent to IEC IP64 The actuator has an axle seal with special packing, and the main case and terminals have both a waterproof ring and an epoxy-sealed mechanism. Also, the entire mechanism is water-proof due to the optional socket. Socket with cord type... IP64 equivalent * A sturdy, shockproof construction The body uses die-cast zinc, and the actuator uses stainless steel. Moreover, shock absorbers have been added to lessen the shock during plunger release. TYPICAL APPLICATIONS Any application where compactness, density, and robustness, such as subminiaturized machines and plant machinery, is required. PRODUCT TYPE 1. Switch body Actuator Push plunger Roller plunger Cross roller plunger Roller arm Adjustable rod Adjustable roller arm Exposed terminal type AZ4001 AZ4002 AZ4003 AZ4004 AZ4007 AZ4008 L socket type* AZ4601 AZ4602 AZ4603 AZ4604 AZ4607 AZ4608 Notes) 1. Cadmium free contact types are available on a custom-made basis. Please add an "F" to the end of the part number when ordering. 2. *L socket type or socket with cord type is combination of; L socket type = Exposed terminal type + L socket, Socket with cord type = Exposed terminal type + Socket with cord type (cord length: 1m) 3. UL recognized, CSA certified type available. When ordering, add suffix 9 to part No.. (For the socket with cord type, only UL recognized type available with suffix 9 to the part No.) 38 Socket with cord type* AZ4701 AZ4702 AZ4703 AZ4704 AZ4707 AZ4708 QL (AZ4) 2. Socket Applicable limit switches Specifications L socket Socket with cord (1 m) Socket with cord (2 m) Socket with cord (3 m) Socket with cord (5 m) Exposed terminal types Part No. AZ3806 AZ3807 AZ3827 AZ3837 AZ3857 3. Socket with LED Applicable limit switches Lamp connection Lamp rating 6V DC 12V DC 24V to 48V DC 6V DC 12V DC 24V to 48V DC Normally open connection Exposed terminal types Normally closed connection Part No. AZ3807162 AX3807161 AZ380716 AZ3807362 AZ3807361 AZ380736 Notes) 1. Types with 24 to 48V DC lamp rating are recommended for PC input use. 2. The following cord lengths are also available and lot-produced upon request. Cord length 2m 6.562ft. 3m 9.843ft. 5m 16.404ft. The 5th digit (boxed) of product code denotes the length of cord. Numerals come in the asterisked (*) digits, which show the lamp specifications. The 7th digit: 1: N.O. connection, 3: N.C. connection The 9th digit: None: 24 to 48V DC, 1: 12V DC, 2: 6V DC Part No. AZ38 2 76 AZ38 3 76 AZ38 5 76 FOREIGN STANDARDS Standards UL recognized product CSA certified product File No. Ratings Product type File No. Ratings Product type Applicable product : E122222 : 5A 250V AC : All products : LR55880 : 5A 250V AC : All products excluding socket with cord types. 125V AC 5A 3A 250V AC 5A 3A Part No. Add "9" to the end of the part No. SPECIFICATIONS 1. Rating Rated control voltage Resistive load (cos ]1) Inductive load (cos ]0.4) 30V DC 5A 3A 125V DC 0.4A 0.1A 2. Characteristics Contact arrangement Initial contact resistance, max. Contact material Initial insulation resistance (At 500V DC) 1 From C 50 m (By voltage drop 5 to 6V DC 1A) Ag alloy (Contains cadmium.) Min. 100M 1000 Vrms for 1 min 1500 Vrms for 1 min 1500 Vrms for 1 min Between non-consective terminals Between dead metal parts and each terminal Between ground and each terminal In the free position In the full operating position Initial breakdown voltage Shock resistance Max. 300 m/s2 {Approx. 30G} (Adjustable rod type and adjustable roller arm type: Min. 100m/s2 {Approx. 10G} 10 to 55 Hz, double amplitude of 1.5 mm 107 (at 120 cpm) 3 105 (at 20 cpm, 5A 250V resistive load) -20 to +60C -4 to +140F Max. 95% R.H. 120 cpm Vibration resistance Mechanical Electrical Expected life (min. operations) Ambient temperature Ambient humidity Max. operating speed 3. Operating characteristics Characteristics Actuator Operating Force [O.F.] (N{gf}) max. Release Force [R.F.] (N{gf}) min. 6.86 {700} 0.69 {70} 6.86 {700 0.69 {70} 6.86 {700} 0.69 {70} 4.41 {450} 0.24 {25} 4.41 {450} to 1.11 {113} 0.24 {25} to 0.06 {6} 4.41 {450} to 2.01 {205} 0.24 {25} to 0.11 {11} Push plunger Roller plunger Cross roller plunger Roller arm Adjustable rod Adjustable roller arm Pretravel [P.T.], max. mm inch Movement Differential [M.D.] max. mm inch Overtravel [O.T.], min. mm inch Totaltravel [T.T.], min. 1 .039 1 .039 1 .039 15 3 15 3 15 3 0.15 .006 0.15 .006 0.15 .006 3 3 3 4 .157 4 .157 4 .157 - - - - - - 80 80 80 Note) For the operating characteristics, refer to the TECHNICAL INFORMATION. 4. Protective characteristics Protective construction IEC IP64 IP65 IP66 5. LED rating Switch body L socket type Type with socket and cord - - - - Rated operating voltage Operating voltage range Internal resistance 6V DC 12V DC 24 to 48V DC 5 to 15V DC 9 to 28V DC 20 to 55V DC 2.4k 4.7k 15k Note) For the switch proper, protect its terminals. 39 QL (AZ4) 2. Actual load life curve (relay coil load) DATA 1. Life curve No. of operations (104) Operating rate: 20 cpm 1 DIMENSIONS (O.P.) 17.20.2 .677.008 N.O. 0.5 1 (O.P.) 25.50.2 1.004.008 280.2 1.102.008 2-4.5 dia. 2-.177 mounting holes 1.6 .063 15.6 .614 (25) (.984) (O.P.) 25.50.2 1.004.008 15.6 .614 15.6 23 .614 .906 M3 socket fastening screw (Set with AZ4003 exposed terminal type and AZ3806 L socket.) 140.2 .551.008 (25) (.984) 14.8 .583 13 .512 M12(P=1.25) head section M8 (Between side 7.5 distance 13) .295 (Set with AZ4004 exposed terminal type and AZ3806 L socket.) (32.5) (1.280) ) AZ4607 280.2 Weight: 1.102.008 94.5g 2-4.50.2 dia. 2-.177.008 dia. mounting holes Adjustable length rod (25-100) (.984-3.937) 3.6 37.5 .142 1.476 15.6 .614 ( 22.5 .886 Mounting metal 14.8 .583 M3 socket fastening screw (O.P.) 4.9 17.20.2 .193 .677.008 (45.6) (1.795) 8 dia. .315 stainless steel plunger 12.6 .496 1.6 .063 280.2 1.102.008 2-4.50.2 dia. 2-.177.008 dia. mounting holes 23.7 .933 22.5 .886 14.5 .571 3.6 37.5 .142 1.476 15.6 .614 23 .906 (2.4) (.094) M3 socket fastening screw 8 .315 25 .984 (32.5) (1.280) 16 .630 ) 14.8 .583 38.81 1.528.039 15.6 .614 General tolerance: 0.4 .016 15.6 .614 3-quick connecting terminal (#110) 15.6 .614 Note) The following types are also available. Roller plunger: AZ4002 Cross roller plunger: AZ4003 Roller arm: AZ4004 Adjustable rod: AZ4007 Adjustable roller arm: AZ4008 44.61 1.756.039 41.61 1.638.039 35.91 1.413.039 32.91 1.295.039 Adjustable length rod (25~55) (.984~2.165) 14.5 Mounting metal .571 M6 mounting metal fastening 3.6 37.5 screw .142 1.476 with hexagonal 15.6 holes .614 140.2 .551.008 280.2 4.8 1.102.008 .189 2-4.50.2 dia. 2-.177.008 dia. mounting holes 23 .906 (2.4) (.094) 14 dia. .551 dia. 140.2 .551.008 M4 arm fixing (with hexagonal holes) Arm fastening plate AZ4608 Weight: 97g M6 mounting metal fastening screw with hexagonal holes 23.7 .933 1 max. (P.T.) 15.4 .039 .606 8.7 .343 35.11 27 min. 1.382.039 1.063 (8.3) 23.7 (.327) .933 M12(P=1.25) head section M8 7.5 (Between side .295 distance 13) Black COM Red N.C. White N.O. (Set with AZ4001 exposed terminal type and AZ3807 socket with cord.) AZ4701 23 .906 (2.4) (.094) 8 .315 25 .984 (32.5) (1.280) (Set with AZ4008 exposed terminal type and AZ3806 L socket.) 3. Socket with cord type Push plunger 3.6 37.2 .142 1.465 R25 M4 arm fastening plate screw 2. Exposed terminal type Push plunger 40 PT 153 15 12.53.8 dia. .492.150 dia. stainless steel roller Presettable at any angle in the 360 range 37.31 1.469.039 (Set with AZ4007 exposed terminal type and AZ3806 L socket.) AZ4001 38.11 1.500.039 Adjustable roller arm 14.5 .571 4.8 .189 140.2 .551.008 8 M12(P=1.25) .315 head section M8 7.5 25 (Between side .295 .984 distance 13) (32.5) (1.280) 23.7 .933 16 .630 2-4.50.2 dia. 2-.177.008 dia. mounting holes Adjustable rod ( General tolerance: 0.4 .016 140.2 M12 (P=1.25) head section M8 hexagon nut 13 .512 7.5 .295 (32.5) (1.280) AZ4604 .551.008 Weight: 280.2 4.8 92.5g 1.102.008 .189 7.5 .295 3 PT 15 23.7 .933 2.6 dia. (8.5) .102 dia. stainless rod (.335) Presettable at any angle 5 in the 360 range .197 M4 rod fastening plate screw Rod fastening plate (25) (.984) M12 (P=1.25) head section M8 hexagon nut 14.8 .583 140.2 .551.008 M4 arm fixing nut 1.6 .063 1.6 .063 15.6 .614 15.6 23 .614 .906 (8.3) PT 153 (.327) 12.53.8 dia. .492.150 dia. stainless steel roller Roller arm 12.6 .496 (2.4) (.094) 280.2 1.102.008 2-4.5 dia. 2-.177 mounting holes 8 .315 280.2 1.102.008 2-4.5 dia. 2-.177 mounting holes 12.6 .496 (2.4) M3 socket (.094) fastening screw 14 dia. .551 10.53.8 dia. .413.150 dia. stainless steel roller 3.6 37.2 .142 1.465 4.9 .193 (Set with AZ4002 exposed terminal type and AZ3806 L socket.) 4.9 .193 8 .315 AZ4602 Weight: 90g 13 .512 7.5 .295 23.7 .933 15.4 .606 14 dia. .551 10.53.8 dia. .413.150 dia. stainless steel roller 3.6 37.2 .142 1.465 M12 (P=1.25) head section M8 hexagon nut 14.8 .583 140.2 .551.008 mm inch 23.7 .933 15.4 .606 1 max.(P.T.) .039 (32.5) (1.280) 1 max.(P.T.) .039 700 12.6 .496 15.6 23 .614 .906 Cross roller plunger 260 (FC-35) (FC-100) Roller pluger 4.9 .193 8 .315 50 Various relay loads (VA) Note) The FC magnetic contactor series is 200 V AC. The NK is 2 Form C 24 V DC type. 15.4 .606 (Set with AZ4001 exposed terminal type and AZ3806 L socket.) 3 5 (HP) (HG) (VC20) (FC-10) 14 dia. 8 dia. .551 .315 stainless steel plunger (2.4) M3 socket (.094) fastening screw AZ4603 N.C. 3 (NK) (HC) 3.6 37.2 .142 1.465 AZ4601 Weight: 90g COM 2 0 23.7 .933 1 max.(P.T.) .039 1 500 250 V AC Resistive load 5 2 3 4 Applied load (A) 1. L socket type Push plunger QL *** *** *** No. of operations (104) 1,000 900 800 700 600 500 400 300 200 100 30 0 WIRING DIAGRAMS 1,000 M3 socket fastening screw 22.5 .886 1.5 .059 14.8 .583 (46.6) (1.835) General tolerance: 0.4 .016 23.7 .933 1 max. (P.T.) 15.4 .039 .606 14 dia. .551 dia. (O.P.) 4.9 17.20.2 .193 .677.008 280.2 1.102.008 2-4.50.2 dia. 2-.177.008 dia. mounting holes 17.0 .669 Vinyl cabtire cord (VCTF) 0.75E3-wire 8 dia. .315 stainless steel plunger 12.6 .496 3.6 37.2 .142 1.465 M3 mounting screw 15.6 .614 8 .315 14 .551 23 .906 20 .787 Approx. 1000 39.370 82 .315.079 Note) The following types are also available. Roller plunger: AZ4702 Cross roller plunger: AZ4703 Roller arm: AZ4704 Adjustable rod: AZ4707 Adjustable roller arm: AZ4708 1.6 .063 15.6 .614 14.8 .583 General tolerance: 0.4 .016 QL (AZ4) mm inch SOCKETS 14.8 .583 10 .394 L socket Terminal case (2.4) (.094) 14.8 .583 2 3 1 5 Socket fastening screw .197 22.5 .886 15.6 .614 (32.5) (1.280) Terminal body 14.8 dia. .583 dia. Rubber packing t=0.50.2 Waterproof ring M121.25 Head section M8 13 .512 Terminal number 1 2 3 Hexagonal nut AZ3806 Terminal receptacle Rubber packing Terminal COM N.C. N.O. General tolerance: 0.4 .016 Socket with cord Rubber packing (t=0.50.2) 14.8 .583 2 Approx. .079 1000 39.370 16.5 .650 Cord (PVC) Socket body 82 .315.079 203 .787.118 23 8.7 .906 .343 3 5 .197 Cord 2 7.5 .295 1 Waterproof ring Rubber packing (2.4) (.094) 9.5 .374 Socket fastening screw Terminal number 1 2 3 AZ3807 (cord length: 1m) weight: 85g Cord color B (Black) R (Red) W (White) Terminal COM N.C. N.O. General tolerance: 0.4 .016 Socket with LED Rubber packing (t=0.50.2) LED lamp Socket body Approx. 1000 2 16.5 .079 39.370 82 .650 203 .315.079 .787.118 14.8 .583 Cord (PVC) 23 8.7 .906 .343 5 .197 Rubber packing 3 1 7.5 .295 Waterproof ring 9.5 .374 Socket fastening screw Terminal number 1 2 3 AZ380716 (cord length: 1m) Cord 2 3.8 .150 1.5 max. .059 LED (Red) (2.4) (.094) Cord color B (Black) R (Red) W (White) 3.8 .150 Terminal COM N.C. N.O. General tolerance: 0.4 .016 LAMP LIGHTING CIRCUIT 1. Load at N.O. side Use normally open (N.O.) connection terminal. LED will be turned on when switch is in free position, when switch is on, LED will be turned off. 2. Load at N.C. side Use normally closed (N.C.) connection terminal. LED will be turned off when is in free position, when switch is on, LED will be turned on. LED 3 N.O. COM 1 Load 2 N.C. Load 3 N.O. Notes) 1. Keep possible leakage current (see the CAUTIONS) in mind in order to prevent the load from malfunctioning. 2. Types with the 24 to 48V DC lamp rating are recommended for sequencer input use. 3. Connect the red and black leads to the positive B and negative v terminals, respectively, for the N.C. type, and the white and black leads to the positive B and negative v terminals, respectively, for the N.O. type. 1 LED COM 2 N.C. + DC power source - + DC power source - 41 QL (AZ4) MOUNTING METHOD 1. L socket type 1) After loosening the L socket fastening screws, grasp the terminal cover and pull it away from the switch body. 2) Remove the fastening screw from the terminal block. (Remove with the 3 terminal receptacle.) 8) After the terminals have been properly crimped in the terminal body, insert the body into the terminal case. (When inserting the body, be careful not to block the hole for the fastening screw with the wires.) 2. Socket with cord (including socket with lamp) 1) Apply the rubber packing over the terminals, then insert the socket with cord into the switch body. Pull away from the body. Turn counterclockwise. Terminal receptacle 3) Loosen the hexagonal nut and remove the rubber bushing and washer from the inside. 9) Temporarily screw in the fastening screw through the terminal body, then insert the washer and rubber bushing into the cord opening of L socket. Tighten it with a wrench or pliers. 2) Screw the socket fastening screw into the switch body and tighten it. Turn counterclockwise. 4) Select cord from applicable wire table. 5) Decide which direction the cord outlet is to face and strip the sheath accordingly. (See page 43.) 6) After passing the applicable cord through the hexagonal nut, bushing, and washer in that order, pass the cord through the terminal case. 10) Apply the rubber packing over the terminals, then insert the L socket into the switch body. Clockwise direction Mounting 11) Tighten the fastening screw into the switch body. 7) After stripping the cord sheath, insert the corresponding wires into the grooves of the terminal body up to the wire stop, then crimp the terminal receptacle over the wires with a pair of pliers. The QL micro limit switch is manufactured with a very small variation in the distance between the datum plane and the operating point. When the operating point has been accurately established and the mounting position clearly determined, two M4 bolts should be used securely fastening the switch. Operating position (O.P.) Mounting datum plane Mounting plate Terminal body connection diagram Terminal receptacle M4 fastening bolts Lead wire Lead wire stop Clockwise direction Terminal body 42 QL (AZ4) CORD OUTLET DIRECTION AND SHEATH STRIPPING DIMENSIONS The cord outlet direction is selected from (1) of the (4) drawings below, and the cord is stripped to match the desired dorection (1) (2) (3) (4) QL 22.5 Standard Packaging condition A Note: The stripping of the cord is based on a length for dimension A as standard and should be stripped accordingly. A 1 3 B 1 3 B A 1 3 2 B 2 AZ3806 2 B AZ3806 2 AZ3806 1 3 A AZ3806 L socket direction A Terminal (1) and (A) direction are aligned. Terminal (3) and (A) direction are aligned. Terminal (1) and (B) direction are aligned. Terminal (2) and (A) direction are aligned. 22 (N.C.) .866 22 (N.O.) .866 Cord sheath stripping dimensions 16 (N.O., N.C.) .630 16 (COM) .630 To (3) To (1) To (1) To (3) To (2) To (2) 22 (COM) .866 14 (N.C.) .551 To (3) To (1) To (2) 16 (COM) .630 14 (COM) .551 To (1) To (2) To (3) 14 (N.O.) .551 16 (N.O., N.C.) .630 Aplicable wire Wire name Vinyl cabtire cord (VCTF) Applicable wire Conductor 0.75 mm2 Wire strand Finished outside diameter 2-wire 6.6mm .268 inch dia. 3-wire 7.2mm .283 inch dia. CAUTIONS 1. Ambient conditions 1) The use of these switches under the following conditions should be avoided. If the following conditions should become necessary, we recommend consulting us first. * Use where there will be direct contact with organic solvents, strong acids or alkalis, or direct exposure to their vapors. * Use where inflammable or corrosive gases exist. 2) Because these switchies are not of water resistant or immersion-proof construction, their use in water or oil should be avoided. Also, locations where water or oil can normally impringe upon the switch or where there is an excessive accumulation of dust should be avoided. 2. Wiring 1) Although QL limit switches have large over-travel (O.T.), excessive O.T. will occur wear and change in its characteristics. Specifically, where there is a need for long life, it is recommended that the proper O.T. should be used. When the operating object is in the free condition, force should not be applied directly to the actuator. 2) Use their own accessories when mounting and wiring QL limit switches so as to maintain their own characterisrics. 3) In order to maintain the reliability at a high level under practical conditions of use, the actual operating conditions should be checked for the benefit of the quality of the product. 4) Do not use the switch in a silicon atmosphere. Case should be taken where organic silicon rubber, adhesive, sealing material, oil, grease or lead wire generates silicon. 5) Avoid use in excessively dusty environments where actuator operation would be hindered. 3. Socket with LED 1) The OFF condition leakage current at each voltage is as follows. Rated operating voltage 6V 24 to 48V DC 12V DC 6V DC 12V 24V 48V - - 1.6mA 3.2mA - 2.6mA 5.2mA - 2.5mA 5.6mA - - 2) Even the polarity of power source is connected in the opposite way, LED is not broken. However, LED is not lit on. 43 SELECTOR CHART Classification Subminiature size Product name SL (AZ3) Micro Limit Switches Compact size HL (AZH) Limit Switches (Die cast case) HL (AZH) Limit Switches (Die cast case) HL (AZH) Limit Switches (Plastic case) ML (AZ7) Limit Switches (standard) ML (AZ7) Limit Switches (Epoxy-Sealed terminal type) Appearance AZH20 AZH10 22 AZH23 12 AZ7 AZ7 * A limit switch with * Switches installed * An ML compact limit * High sealability that * High sealability that * Bifurcated type available. satisfies IEC IP67. high-density mounting satisfies IEC IP67. with both economical switch with an * Perfect for applicathat improves stroke * Wiring is screw-ter- * Less wiring, less and compact Z-basic epoxy-sealed case tions that prioritize installation conneccapacity through an microswitches and that completely minal type. Feature economy. tor type. O.T. absorption-type * Bifurcated type also limit switch protective encloses the * LED lamp type also spring. construction. terminal. available. available. * LED lamp type also * Coil spring system available. provides long life. Rubber-cover type Socket with cord type Dust-proof type IP60 With lamps Protective construction Head code AZ3 Abrasion-proof type IP64 - - Surge-proof type IP65 - - - - - Corrosion-proof type IP67 - - - - - - - Oil-resistant type - Neon - - - - - - - LED - - (with LED lamps) - - - 10A250V AC 10A125V AC 0.4A115V DC 10A250V AC 10A125V AC 0.4A115V DC 107 107 Ratings (load resistance) Mechanical Life (Min.ope.) Electrical Operating force (max.) (hinge lever type) 4A250V AC 4A125V AC 4A30V DC 0.1A 125V DC [Standard type] [Bifurcated type] [Standard type] [Bifurcated type] [Bifurcated type] 5A125V AC 0.1A125V AC 5A125V AC 0.1A125V AC 5A250V AC 0.1A8V DC without LEDlamps with LEDlamps 5A250V AC 0.1A8V DC 5A8V DC 0.1A14V DC 5A8V DC 0.1A14V DC 0.1A125V AC 0.1A24V AC 5A14V DC 0.1A30V DC 5A14V DC 0.1A30V DC 0.1A8V DC 5A30V DC 5A30V DC 0.1A14V DC 0.5A125V DC 0.5A125V DC 0.1A30V DC 0.25A250V DC 0.25A250V DC 107 5 107 107 5 107 5 10 0. 98N {100gf} 1. 96N {200gf} (short lever type) 2. 94N {300gf} 5x10 2.45N {250gf} 3. 92N {400gf} 11.8N {1,200gf} (Plunger type) 5x10 2.45N {250gf} 3.92N {400gf} 11.8N {1,200gf} (Plunger type) * Rubber cover (Solder and quick connect (#110) terminal) * Socket with cord Screw terminal Connector terminal 2x10 1.47N {150gf}, 1.77N {180gf}, 1.96N {200gf}, 2.16N {220gf}, 2.35N {240gf}, 2.75N {280gf}, 5.88N {600gf} max. 2x105 1.47N {150gf}, 1.77N {180gf}, 1.96N {200gf}, 2.16N {220gf}, 2.35N {240gf}, 2.75N {280gf}, 5.88N {600gf} max. Screw terminal Screw terminal Vinyl cabtire cable (1m 3.281ft) 5x10 5 2.45N {250gf} 3. 92N {400gf} 5 Available actuators Terminals Wiring Mounting pitch (Applicable screw) Available standards Page Cabtire code Cabtire code Cabtire code Cabtire code Cabtire cable Cabtire cable Cross-angled wiring 28 14mm 1.102 .551inch (M4 screw) 33mm 1.299inch (M4 screw) 33mm 1.299inch (M4 screw) 33mm 1.299inch (M4 screw) 25.4mm 1.000inch (M4 screw) 25.4mm 1.000inch (M4 screw) UL, CSA UL, CSA, TUV, CE UL, CSA, TUV, CE UL, CSA, TUV, CE UL, C-UL, TUV, CE - P.13 P.18 P.18 P.18 P.33 P.33 Fork Note: Excludes limit switch replacement parts Actuators Push plunger Roller plunger Cross-roller plunger Roller arm Adjustable roller arm Adjustable rod Spring wire Flexible rod Hinge lever Roller lever One-way roller lever Roller lever Short Short Long 2 Short Long Long Classification Subminiature size vertical type Product name QL (AZ4) Micro Limit Switches Compact size vertical type DL (AZD1) Mini Limit Switches VL (AZ8) Mini Limit Switches Vertical type Touch type AZ5 Limit Switches VL-T Mini Touch Limit Switches Door switch Compact Magnelimit Magnelimit Appearance Head code With lamps Protective construction AZ4 AZD1 AZ8 AZ5 AZ84 AZC3 AZC1 * A subminiature, highly accu- * Excellent safety even if the * In addition to the * Built-in dedicated * Operate just by * Secured by magnet * Secured by magnet rate limit switch with built-in contact point is welded, characteristics of circuit breaker touching lightly. environment-proof functions. due to the forced contact stand mounted limit (1 Form A * Comes with sen- * Built-in switch detection * Built-in switch detection * Cord extraction can be opening mechanism. switches, is com1 Form B). sitivity adjustment Dual-role switch in Dual-role switch in Feature changed in four directions, * Block mount system makes pact, easily instal- * Different types of function and indione unit. one unit. due to the dedicated L socket. parts replacement easy. lable, highly reliactuator availcates operations. * Safe design prevents * Construction possi* LED lamp can also be * Conforms to DIN stanable, lightweight, able. * VL type touch operator making ble with 100V AC attached. dards. and economical. limit switch errors. power. L socket type Socket with cord type Dust-proof type IP60 - - Abrasion-proof type IP64 - - Surge-proof type IP65 - - - - - - Corrosion-proof type IP67 - - - - - - - - Neon - - - - - - - - LED - - - - - - [Standard type] 5A250V AC 5A125V AC 0.4A125V DC [With lamp type] [Neon lamp type] 5A 240V AC 5A 125V AC [LED lamp type] 3A 24V DC [Standard type] 10A125V AC 6A250V AC 2A500V AC 0.8A125V DC [With lamp type] [Neon lamp type] 10A 125V AC 6A 240V AC [LED lamp type] 6A 24V DC Input voltage 12-24V DC Output current 150mA Oil-resistant type - Ratings (load resistance) Mechanical Life (Min.ope.) Electrical Operating force (max.) (hinge lever type) 5A250V AC 6A250V AC 6A380V AC 5A24V DC 107 107 5 3x10 6.86N {700gf} (Plunger type) 1.11N {113gf}, 4.41N {450gf} (Arm type) 107 5 1.5x10 6.37N {650gf} 4.90N {500gf} 3.29N {400gf} 107 5 3x10 0.88N {90gf}, 5.88N {600gf}, 8. 83N {900gf}, 19.16N {2,000gf} 5x10 5 1.39N {142gf} 26.67N {2,720gf} 1) 2) 5A (2A) 125V AC 5A (2A) 250V AC 5A (2A) 30VDC 105 5A 125V AC 5A 250V AC 5A 30VDC 107 - 105 5x10 5x104 - - 3.43N {350gf} 4 Available actuators Free attachment Terminals Wiring Mounting pitch (Applicable screw) Available standards Page * L socket (Solderand quick connect (#110) terminal) * Socket with code Screw terminal (Conduit connectors: PF: 1/2, PG: 13.5 types) Screw terminal Screw terminal Screw terminal Tab #110 terminal Lead wire Screw terminal Cabtire code Cabtire code Cabtire cord Cap tire cable Cabtire cable (wiring type) Cabtire cord Cabtire cable Cabtire cord Cabtire cord 14 28mm .551 1.102inch (M4 screws) 22 (47mm) .866 1.850inch (M4 screws) 21 56mm .827 2.205inch (M4 screws) 30.2 58.7mm 1.189 2.311inch (M5 screws) 21 56mm 827 2.205inch (M4 screws) 30mm 1.181inch (M3) 52mm 2.047inch (M4) UL - UL, C-UL UL, C-UL, CE P.61 P.68 P.72 P.74 UL, CSA UL, C-UL, TUV, CE UL, C-UL, TUV, CE P.38 P.44 P.52 Notes: 1) Excludes exposed part of terminals, externally mounted components, and magnet catches. 2) Figures in parentheses ( ) indicate rated current of water-resistant type. Other listed products Product name PS Hall Sensors Appearance AN9 Detector distance 2.5mm .098inch Feature Page * Magnetic detector type subminiature sensor * Perfect for slide table limiting * Economical price with operating display lamp attached. P.76 3 ACTUATOR SELECTION Type 4 Classification Pretravel (P.T.) Overtravel Operating Accuracy (O.T.) force (O.F.) Vibration shock Characteristics Push plunger type Small Medium Large Excellent Excellent High-level accuracy gives firm detection for position fixing, etc., by using perpendicular movement. Roller plunger type (includes cross roller plunger) Small Medium Large Excellent Excellent Operating range can be widened by mounting accessory actuators like cams, dogs, cylinders, etc. High-level detection for position fixing. Excellent The stroke in the direction of revolution is large at between 45 and 90 and the lever angle can be set at will to within 360 for easy use. Wide angle type (large O.T.) available. Can be used for wide-range position fixing. Roller arm type Small to large Large Medium Good to excellent Adjustable roller arm type Small to large Large Medium Good to excellent Good Lever length can be altered to allow rough operation detection using the roller lever characteristics. Adjustable rod type Large Large Medium Good Good Wide range of operations, and convenient for uneven mountings. Lightest operation among the revolving operation type of limit switches. Rod length is adjustable, and bending is also easy. Fork Large Medium Medium Good Excellent If operated up to 55 position, revolves automatically to retain 90 position. Two dog operation enables recovery operation through single dog, or for anything that has caused the roller position to slip. Spring wire and flexible rod Medium Large Small Possible Possible Excluding the thread direction, direction can be adjusted up to 360. Operating power is the lowest of the limit switches, and is effective in detecting when direction and conditions are uneven. In order to absorb the movements after operation in the actuator part, work slippage tolerances are also large. Hinge lever type Large Medium Small Possible Possible Using a low speed, low torque cam, the lever can assume various shapes suited to the operation. The lever is very sturdy. Roller lever type Large Medium Small Possible Possible Suited to high speed cams through the attachment of a hinge roller lever. One way roller lever type Medium Medium Medium Possible Possible Operation is possible with both hinge lever type and one way operation, but the roller will break if operated in the opposite direction, rendering the unit inoperable. Can be used to prevent opposite direction movement. Roller lever type Medium Medium Medium Possible Possible The roller position can be changed. TECHNICAL INFORMATION Standard glossary CONSTRUCTION * Fixed rating values * Actuator * * * * * * The values that guarantee the standards for the limit switch characteristics and functions. For example, the rated current and rated voltage, which are preset conditions (load type, current, voltage, frequency, etc.) Operating object The mechanism and mountings that operate the limit switch actuator. Used for mechanical operators such as cams and dogs. Detective object The unit other than mechanical mountings that operate the limit switch. Products, parts, jigs, etc. Reaction spring (movable spring) The mechanical part that switches the limit switch contact is called either the reaction spring or the moveable spring. Contact When the counter-spring revolves, power is switched on and off through the contact between metal parts Contact gap The effective clearance between the fixed contact and the moveable contact. Also called breaking distance. Contact arrangement The construction of the electrical input/output circuit depending on use. For example, the following two applications: * * * This part directly detects movement of the dog, cam, and so forth in the operating unit, and transmits external force to the changeover mechanism, thereby engaging the moveable contact and operating the switch. Headblock An independent part of the actuator mechanism of the Limit Switch. Wiring vent (cord vent) The seal on the wiring at the mouth of the wiring vent. Also called the conduit vent for the screw hole used in the wiring. Terminals The part of the wiring work in the wiring that forms the circuit for electrical input and output. OPERATING CHARACTERISTICS * Operating Force (O.F.) * * * * Roller Head block Actuator Arm Cam Roller Plunger * Reset spring Pushbutton * Front view Cam Cord vent * Roller Reset spring F Pushbutton N.O. N.C. [1 Form C(Single Pole Double Throw)] COM VL limit switch * The force required to cause contact snap-action. It is expressed in terms of force applied to the actuator. Release Force (R.F.) The force to be applied to the actuator, at the moment contact snaps back from the operated position to unoperated position. Pretravel (P.T.) Distance of the actuator movement from free position to operating position. Overtravel (O.T.) The distance which the actuator is permitted to travel after actuation without any damage to the switching mechanism. Total Travel (T.T.) The distance which the actuator is permitted to travel from free position without any damage to the switching mechanism. Movement Differential (M.D.) The distance from operating to release position of the actuator. Operating Position (O.P.) The position of the actuator when the traveling contact snaps to the fixed contact. Release Position (R.P.) The position of the actuator when the traveling contact snaps back from the operating position to its original position. Free Position (F.P.) Position of the actuator when no force is applied to it. Free position N.C. F N.C. O. P. Operating position O. P. Operating position P.T. P.T. [1 Form Z(Double Break Double Make)] N.O. O.T. M.D. O.T. M.D. N.O. R.P. R.P. * Contact type * Used in opposition to a semiconductor switch that has switching characteristics. Fulfills switch functions through a mechanical ON/OFF contact. Terminal mold After wiring, the connecting part is molding by epoxy resin for waterproof, oil-resistant and dust-proof capabilities. R.F. O.F. P.T. R.T. M.D. O.T.T.F. F.P. T.T. O.P. R.P. Standard position Note: F.P., O.P., and R.P. are expressed as distances from the standard position. 5 TECHNICAL INFORMATION Glossary relating to the EN60947-5-1 * EN60947-5-1 * EN standard same as IEC947-5-1 Utilization categories The following examples express the classification of switches by category of use. Current type Category Contents AC AC-15 Controls electromagnetic loads in excess of 72VA (Volt Amperes.) DC DC-12 Controls resistance loads and semiconductor loads. * Rated impulse withstand voltage * * * Rated operational voltage (Ue) * * 6 The maximum rated voltage for switch operation. This must never exceed the maximum ratings insulation voltage (Ui). Rated operational current (Ie) The maximum rated current for switch operation. Rated insulation voltage (Ui) The maximum rated current value which guards the switch's insulation functions, forming the parameters for the resistance values and the mounting distance. * * (Uimp) The peak impulse current value which enables the switch to resist without insulation breakdown. Rated enclosed thermal current (Ithe) The current value that enables current to flow without exceeding the specified maximum temperature in the recharging contact switch. If the pins are made of brass, the maximum temperature limit is 65C 149F. Conditional short circuit current The current the switch can resist until the short circuit protection device is activated. Short circuit protection device A device that protects the switch from short circuits through a circuit break (breakers, fuses, etc.) Switching overvoltage The surge momentarily generated when a circuit is closed. Must be lower than the Uimp value. * Pollution degree Expresses in levels the environment in which the switch is used. The four levels are shown below. Limit switches come under contamination level 3. Pollution degree Contents 1 No contamination or, even if contamination is present, only non-conducting contamination is generated. 2 Normally, only non-conducting contamination is generated, but there remains the possibility of temporary conducting contamination when the circuit is formed. 3 Conducting contamination is generated, or else dry non-conducting contamination is generated by circuits which can be anticipated. 4 Permanent conducting contamination is generated by dust, rain, snow, and other conductors. PROTECTIVE CONSTRUCTION Protective construction Expresses the degree of protective construction that guards the level of functionability of the switch against ingress of solid objects, water, and oil. The standards are IEC529 (IEC: International Electrotechnical Commission) standards. IEC standards determine the level of protection against both water and solid objects, but not against oil. Protection against both water and solid objects IP- Level Protection level 0 Protection level and test methods -- No particular protection Protection against rain fall 3 Rain-proof No damage incurred when sprayed with water continuously for 10 minutes at angles of up to 60 from the perpendicular. Protection against flying foam 4 Foam-proof No damage incurred when sprayed with water continuously for 10 minutes at angles of up to 180 from the perpendicular across a wide area. Protection against water Protection against spray 5 Nozzle radius 6.3mm .248inch Water pressure 30kP Spray-proof No damage incurred when sprayed with a jet of water for 3 minutes from all directions, as per the diagram on the left. 3m 9.843ft. Protection against waves Nozzle radius 12.5mm .492inch Water pressure 100kP 6 Water proof Water does not invade the interior when sprayed with a jet of water for 3 minutes from all directions, as per the diagram on the left. 3m 9.843ft. 7 1m 3.281ft. Protection against corrosion while immersed in water Corrosionproof Water does not invade the interior during immersion for 30 minutes at a depth of 1m 3.281ft.. Level Protection level Protection level and test methods Protection against solid objects exceeding 1mm .039inch in size. 4 1.0 .039 dia. -- A hard wire 1mm dia. .039 inch dia. across cannot penetrate the inside. Protection against dust Protection against solid objects 5 -- The unit is left for 8 hours in an atmosphere in which 2kg of talcum powder per 1m3 is floating. No damage incurred from talcum powder penetrating the inside. Protection againt dust (dust does not penetrate) 6 Dust-proof The unit is left for 8 hours in an atmosphere in which 2kg of talcum powder per 1m3 is floating. The talcum powder does not penetrate the inside. Note: 1. All of the tests cited above were conducted with the cord vent (conduit vent) tightly shut. 2. The above protective constructions are based on IEC standard but major differences may arise due to length of use and operating environment. This should be thoroughly discussed and verified. 3. When the corrosion-proof model is immersed in water for 30 minutes or more, verify that no water has penetrated the inside before use. 7 CAUTIONS FOR USE DESIGN OF OPERATING DOG AND OPERATING SPEED Pay attention to the following points when designing the dog for limit switch operation. 1. Make the dog faceplate as smooth as possible. 2. Adjust both the dog angle and the set arm angle as below, depending on the operating speed. 3. The depth (h) of the dog effects the lifespan of the limit switch. Therefore, set the depth to a maximum of 80% of the Total Travel (T.T.) 4. The relationship between the speed of the dog (V = m/s) and the tip angle () is as follows: 1) V&0.2m/s = 45 to 90 V h 5) Roller plunger type 3) 0.5m/s ! V&2m/s V h F o Vmax (m/s) 40 0.7 35 0.9 30 1.3 25 2.0 The maximum tolerable speed can be extended by further reducing the dog rise angle from 45 when 0.5m/s ! V&2m/s. It is necessary to set the arm so that the dog's cutting surfaces are always parallel ( o = 90- ) 4) Overriding the dog (V&0.2m/s) Vmax (m/s) 45 0.2 60 0.1 60 to 90 0.05 When V&0.2m/s, set the arm to perpendicular and set the arm rise angle to between 45 and 90. If the dog rise angle is reduced, the maximum tolerable speed is increased. As a rule, = 45 is optimum. 2) V&0.5m/s = 45 V h F o = 45 Because the arm jiggle is as a minimum at a comparative speed such as V&0.5m/s, setting both the dog angle so that it travels perpendicularly and the arm angle to 45 is optimum. 8 h h Vmax (m/s) 45 0.2 60 0.1 60 to 90 0.05 If overriding the dog, set the arm perpendicularly, so that =45. If the dog angle is reduced, the tolerable speed is increased. Vmax (m/s) h 20 0.5 (0.5 to 0.7) T.T. 30 0.25 (0.6 to 0.8) T.T. Even if overriding the dog, set the forwards and rearwards motion exactly the same, and avoid any settings that make the actuator accelerate rapidly from the dog. 5. Operation speed 1) When the operation (acting and reverting) speed is exceedingly slow, switching of the contacts will become unstable and this could cause problems such as failure to make contact and welding. As a guide, the speed should be at least 1mm/s. 2) When the operation (acting and reverting) speed is exceedingly fast, be careful because the violent motion could cause breakage and with increased frequency, contact switching will not be able to keep up. As a guide, the switching frequency should be within 20 times per minute. CAUTIONS FOR USE PROTECTION CIRCUIT 2. Do not connect either irregular poles or power sources to a switch contact. Power connection examples (irregular pole connection) 3. Avoid circuits where power may find a way between the contact points (as this may cause welding.) NO GOOD NO GOOD Load L ~ 1. The ON/OFF circuit for the guidance load may suffer contact damage due to surges or inrushes when the power is turned either ON or OFF. Consequently, insertion of a protective circuit as per the following diagram is recommended, in order to protect the contacts. Cautions for use Limit switch contact r c R Limit switch contact r c R (1) r must be a minimum of 10; (2) When using AC power: Q Impossible when R impedance is large. W Possible when c, r impedance is sufficiently small compared with R impedance. Can be used with both AC and DC as appropriate. r~R C: 0.1 F Load Load GOOD L Load Load connected to same pole Example of unsuitable power connection (abnormal power connection) Risk of AC and DC being mixed. Load NO GOOD L AC R (1) Dedicated DC use. (2) AC is impossible DC Limit switch contact ZNR Varistor R Can be used with both AC and DC as appropriate. 200V 100V Limit switch contact Diode ~ L Circuit Load 4. Using electronic switch circuits (low power, low current) 1) Bouncing and chattering are generated due to collision between the contacts when the limit switch is switching between them, and this sometimes causes such problems as white noises and error pulses in both the electronic circuit and the reverberation equipment. 2) If the generation of bouncing and chattering becomes a problem, it is necessary to consider installing a CR circuit or other absorption circuit given the circuit design. 3) This is particularly necessary when high contact reliability is needed, and is unsuitable for silver contact switches. Switches with gold contacts possess excellent performance. L 9 CAUTIONS FOR USE CAUTIONS FOR USE 1) Do not attempt to physically alter any part of the switch itself, such as the actuator, or switch attachment vent, as this may cause alterations to both characteristics and performance, and damage the insulation. 2) Do not pour any lubricants such as oil or grease onto the moving parts of the actuator, as there is a possibility that this will cause a malfunction due to seepage into the inside, and impair the motion. Silicon-based grease in particular affects the contact points badly. 3) If the switches are not to be used for an extended period of time, their contact reliability may be reduced due to oxidation of the contact points. Because accidents may result from the impaired conductivity, always implement a check beforehand. 4) Prolonged continuous use of the switch hastens deterioration of the parts (especially the seal rubber) and may cause a malfunction in the release. For this reason, always implement a check beforehand. 5) Usage in the vicinity of either the switch operating position (O.P.) or the release position (R.P.) results in unstable contacts. If using the NC contact point, set the actuator to return to the free position (F.P.) Also, is using the NO contact point, hold the ratings values down to 70 to 100% for the overtravel (O.T.) 6) If the actuator is forced beyond its total travel (T.T.), the internal mechanism may be damaged. Always use within the T.T. 7) Do not apply unreasonable force to the actuator, as this may result in damage and impaired movement. 8) The switch, if dropped, may break due to excessive vibration and impact. Therefore, please use extra caution when transporting and installing. 9) Condensation inside the switch may occur if there are rapid ambient temperature changes when the switch is in a high temperature and humidity. Since this occurs easily during marine transport, be extra cautious of what the environment will be when shipping. Condensation is the phenomenon in which water vapor condenses into switch-adhering water droplets when the temperature rapidly drops in a high-temperature, high-humidity atmosphere or when the switch is quickly moved from a low temperature location to a place of high temperature and high humidity. It is the cause of insulation deterioration and of rust. 10) Be careful of freezing in temperatures below 0C. Freezing is the phenomenon in which moisture adhering to the switch from condensation or when in unusually high-humidity environments freezes onto the switch when the temperature drops below the freezing point. Please extra caution because freezing can lock moving parts, cause operational delays, or interfere with conductivity when there is ice between the contacts. 11) In low-temperature, low-humidity conditions, plastic becomes brittle and the rubber and grease harden, which may lead to malfunction. 12) Long term storage (including during transport) in high temperature or high humidity environments or where the atmosphere contains organic or sulfide gas, will cause sulfide or oxide membrane to form on the contact surfaces. This in turn will cause unstable or failed contacting that may lead to functional malfunction. Please verify the atmosphere when storing and transporting. 13) Packaging should be designed to reduce as much as possible the potential influence of humidity, organic gas, and sulfide gas, etc. 14) Please avoid sudden changes in temperature. This is a cause of switch deformation and encourages the seal structure to breathe, which may lead to seal failure and operational malfunction. 15) If installing a thermoplastic resin case, the use of a spring washer tightened directly against the case will cause the case to collapse and become damaged. Therefore, please add a flat washer before tightening. Also, be careful not to install if the case is being twisted. 16) For the purpose of improving quality, materials and internal structure may be changed without notice. 17) When used outdoors (in places where there is exposure to direct sunlight or rain such as in multistory car parks) or in ambient temperature environments where ozone is generated, the influence of these environments may cause deterioration of the rubber material. Please consult us if you intend to use a switch in such environments. PRECAUTIONS RELATING TO THE INSTALLATION ENVIRONMENT Avoid using in silicon environments such as organic silicon-based rubber, solvents, sealants, oil, grease, or wiring. 10 IMPROVEMENT EXAMPLES Poor design Improved design Explanation @ r Problem * Dog adjustment is difficult. Solution * Separate each one until the dog can be adjusted. r Problem * The dog axis is too long, and slips out during operation. * For this reason, the limit switch operating position slips. Solution * Firmly fix the dog plate to the base. @ Dog axle @ Detector Printer Detector r Rotation axle Conveyer Conveyer @ r Rotation axle @ Problem * The detector sinks, applying force to the limit switch. * The limit switch O.T. cannot be set. Solution * Relieve the pressure using an additional actuator, and the O.T. can also be set. Problem * The area around the actuator coil is easily damaged. * Friction generated during operation. Solution * Relieve the friction by installing an additional actuator. * Change the type of limit switch. r Problem * Workers keep bumping the actuator. Solution * Fit a protective cover to the side of the limit switch. r Problem * Because the cord vent for the limit switch faces upwards, water droplets and so forth can easily penetrate the interior. * The cord is constantly moving and thus easily damaged. Solution * Fix the limit switch position on the stationary board. * Fit a protective cover, so that water and oil cannot come into direct contact with the limit switch. r Problem * The cord is not fixed, and gets pulled during work. * Dog adjustment is ineffective. Solution * Change the limit switch position, and fix the cord. * Attach an adjustment mechanism to the dog. r Problem * The limit switch is near a high-temperature area. * Dog adjustment is ineffective, and the dog keeps bumping the lever. Solution * Move the limit switch further away. * Make dog adjustment possible, and change the shape of the unit. Limit @ Protective cover @ @ High temperature High temperature 11 IMPROVEMENT EXAMPLES Poor design @ Detector Improved design Problem * The detector is scratched. * Limit attachment adjustments are difficult * The actuator is damaged. * Specimen transfer is impeded. Solution * Fix the limit position to behind the dumper to solve the above problems. Dumper r Conveyer @ Rotation axle r Conveyer Conveyer Detector Problem * The transfer path of the detector is not fixed, and it keeps bumping the actuator. * The operating position is unstable. * The actuator is damaged. Solution * Stabilize the operating position by fitting an additional actuator. * Make limit switch adjustment possible. Detector @ r Problem * Stroke adjustment ineffective. * Release the limit switch position, and ensure that the dog does not bump the lever. Solution * Make dog adjustment possible. * Change the limit switch position, and sure that the dog does not bump the lever. r Problem * The cam shape is unsuitable (especially during release and strike release.) * Direction of limit switch attachment is unsuitable. Solution * Render the cam shape smooth. * Change the limit switch position. Dog @ 12 Explanation Table of Recommended Substitute Products for Discontinued Products Products to be discontinued Recommended substitute products Page AZ1 series Limit switches ML (AZ7) Limit switches P.33 AZ2 series Limit switches ML (AZ7) Limit switches P.33 Slitted type Limit switches (AZ6) ML (AZ7) Limit switches P.33 New slitted type Limit switches (AZ66) ML (AZ7) Limit switches P.33 Recommended substitute products Installation Products to be discontinued AZ1 You cannot use this nut for panel installation. AZ7 Please note that installation method and operation characteristics are different. AZ2 AZ7 Please note that installation method and operation characteristics are different. AZ6 AZ7 Please note that installation method and operation characteristics are different. AZ66 AZ7 Please note that installation method and operation characteristics are different. 77 FOREIGN STANDARDS OVERVIEW 1. International Standards 3. Europe IEC standard EN standard International Electrotechnical Commission By promoting international cooperation toward all problems and related issues regarding standardization in the electrical and electronic technology fields, the IEC, a non-governmental organization, was started in October, 1908, for the purpose of realizing mutual understanding on an international level. To this end, the IEC standard was enacted for the purpose of promoting international standardization. 2. North America LISTING MARK Fig. 1 RECOGNITION MARK Fig. 2 Certification Fig. 3 Component Acceptance Fig. 4 Fig. 5 Fig. 6 78 UL (Underwiters Laboratories Inc.) This is a non-profit testing organization formed in 1894 by a coalition of U.S. fire insurance firms, which tests and approves industrial products (finished products). When electrical products are marketed in the U.S., UL approval is mandated in many states, by state law and city ordinances. In order to obtain UL approval, the principal parts contained in industrial products must also be ULapproved parts. UL approval is divided into two general types. One is called "listing" (Fig. 1), and applies to industrial products (finished products). Under this type of approval, products must be approved unconditionally. The other type is called "recognition" (Fig. 2), and is a conditional approval which applies to parts and materials. CSA (Canadian Standards Association) This was established in 1919 as a non-profit, nongovernmental organization aimed at promoting standards. It sets standards for industrial products, parts, and materials, and has the authority to judge electrical products to determine whether they conform to those standards. The CSA is the ultimate authority in the eyes of both the government and the people in terms of credibility and respect. Almost all states and provinces in Canada require CSA approval by law, in order to sell electrical products. As a result, electrical products exported from Japan to Canada are not approved under Canadian laws unless they have received CSA approval and display the CSA mark. Approval is called "certification", and products and parts which have been approved are called "certified equipment", and display the mark shown in Fig. 3. The mark shown in Fig. 4 is called the "Component Acceptance" mark, and indicates conditional approval which is applicable to parts. The C-UL mark shown in Fig. 5 (finished products) and Fig. 6 (parts) indicates that the product has been tested and approved in UL laboratories, based on UL and CSA standards, through mutual approval activities. European Standards/Norme Europeennee (France)/Europaishe Norm (Germany) Abbreviation for European Standards. A unified standard enacted by CEN/CENELEC (European Standards Committee/European Electrical Standards Committee). EU and EFTA member nations employ the content of the EN standards into their own national standards and are obligated to abolish those national standards that do not agree with the EN standards. (1) Germany VDE TUV Rheinland VDE (Verband Deutscher Elektrotechniker) The VDE laboratory was established mainly by the German Electric Technology Alliance, which was formed in 1893. It carries out safety experiments and passes approval for electrical devices and parts. Although VDE certification is not enforced under German law, punishment is severe should electrical shock or fire occur; therefore, it is, in fact, like an enforcement. TUV (Technischer Uberwachungs-Verein) TUV is a civilian, non-profit, independent organization that has its roots in the German Boiler Surveillance Association, which was started in 1875 for the purpose of preventing boiler accidents. A major characteristic of TUV is that it exists as a combination of 14 independent organizations (TUV Rheinland, TUV Bayern, etc.) throughout Germany. TUV carries out inspection on a wide variety of industrial devices and equipment, and has been entrusted to handle electrical products, as well, by the government. TUV inspection and certification is based mainly on the VDE standard. TUV certification can be obtained from any of the 14 TUVs throughout Germany and has the same effectiveness as obtaining VDE certification. SAFETY STANDARDS RECOGNITION Limit switches Product name File No. E122222 SL limit switches Dies-cast case standard load type HL limit switches Die-cast case low level load type (includes connector type) Plastic case standard load type Standard type Epoxy-sealed terminal type With lamp QL limit switches Standard type VL limit switches With neon lamp 10A 250V AC - - E122222 - - 5A 250V AC E122222 Vertical limit switches E99838 5A 250V AC Pilot duty B300 E43149 2A 250V AC Water-resistant type E122222 5A 250V AC Pilot duty B300 TUV approval Approved ratings - DC-12 1A 30V- J9650514 DC-12 0.1A 30V- J9650515 0.1A 30V DC E122222 (C-UL) - - LR55880 5A 250V AC Pilot duty B300 6A 380V AC Pilot duty A300 10A 1/2HP 125V AC 6A 1/2HP 250V AC 5A 250V AC Standard type File No. - 0.1A 30V DC LR55880 5A 250V AC Pilot duty B300 E122222 E122222 Magnelimit CSA certified Approved ratings 4A 250V AC 5A 250V AC Pilot duty B300 0.1A 30V DC DL limit switches Compact Magnelimit File No. LR55880 0.1A 30V DC E122222 Plastic case low level load type ML limit switches UL recognized Approved ratings 4A 250V AC 5A 250V AC Pilot duty B300 AC-15 2A 250V~ DC-12 1A 30VDC-12 0.1A 30V- 10A 250V AC J9551204 AC-15 2A 250V~ - - 5A 250V AC - - - J9551203 - - - - AC-15 2A 250V~ - J9551205 AC-15 2A 250V~ E122222 (C-UL) E122222 (C-UL) 5A 250V AC Pilot duty B300 6A 380V AC Pilot duty A300 - - - - 5A 250V AC - - 2A 250V AC - - 5A 250V AC Pilot duty B300 - - E43149 (C-UL) E43149 (C-UL) E122222 (C-UL) CE MARKINGS OVERVIEW Limit switches conforming to EN/IEC standards The limit switches shown below conform to both EN and IEC standards, and may display the CE markings. Product classification Limit switches Product name HL ML VL DL Magnelimit Suitable standard EN60947-5-1 EN60947-5-1 EN60947-5-1 EN60947-5-1 EN60947-5-1 Approving body TUV TUV TUV TUV - File No. J9650514/J9650515 J9551204 J9551203 J9551205 - Note: Refer to the page for each individual product for detailed approval conditions and approved types. Moreover, the HL limit switch alone does not display the CE mark as standard. If the CE mark is necessary, add (CE) to the end of the part No. when ordering. What are EN standards? An abbreviation of Norme Europeenne (in French), and called European Standards in English. Approval is by vote among the CEN/CENELEC member countries, and is a unified standards limited to EU member countries, but the contents conform to the international ISO/IEC standards. If the relevant EN standard does not exist, it is necessary to obtain approval based on the relevant IEC standard or, if the relevant IEC standard does not exist, the relevant standard from each country, such as VDE, BS, SEMKO, and so forth. CE markings and EC directives The world's largest single market, the European Community (EC) was born on 1 January 1993 (changing its name to EU in November 1993. It is now always expressed as EU, apart from EC directives.) EU member country products have always had their quality and safety guaranteed according to the individual standards of each member country. However, the standards of each country being different prevented the free flow of goods within the EU. For this reason, in order to eliminate non-tariff barriers due to these standards, and to maximize the merits of EU unification, the EC directives were issued concomitant to the birth of the EU. The EN standards were established as universal EU standards in order to facilitate EU directives. These standards were merged with the international IEC standards and henceforth reflect the standards in all countries. Also, the CE markings show that products conform to EC directives, and guarantee the free flow of products within the EC. Appropriate EC directives for control equipment products The main EC directives that are to do with machinery and electrical equipment are the machinery directive, the EMC directive, the low voltage directive, and the telecom directive. Although these directives have already been issued, the date of their enactment is different for each one. The machinery directive was 1 January 1995. The EMC directive was 1 January 1996, and the low voltage directive was enacted from 1 January 1997. The telecom directive was established by the separate CTR (Common Technology references.) 79