Temperature Monitoring Relay K8AK-TH Compact and Slim Relay Ideal for Temperature Alarms and Monitoring * Excessive temperature increases can be prevented and abnormal temperatures can be monitored. * Temperature monitoring in slim design with a width of just 22.5 mm. * Rotary switches simplifies temperature settings. * Universal-input support for thermocouple or platinum resistance thermometer sensor input. * Change the output relay between normally open and normally closed operation. * Alarm status identification with LED indicator. * Self-holding output. Refer to Safety Precautions on page 8. For the most recent information on models that have been certified for safety standards, refer to your OMRON website. Ordering Information K8AK-TH (Temperature Input Models) Power supply voltage Type Output relays Input types Setting units (setting range) Model 100 to 240 VAC Temperature 1 relay input Thermocouple or platinum Setting unit: 1C or 1F (0 to 999C/F) K8AK-TH11S 100-240VAC resistance thermometer 24 VAC/DC Thermocouple or platinum Setting unit: 1C or 1F (0 to 999C/F) K8AK-TH11S 24VAC/DC resistance thermometer Thermocouple Thermocouple Setting unit: 10C/F* Setting unit: 10C/F* K8AK-TH12S 100-240VAC K8AK-TH12S 24VAC/DC * Refer to Setting Ranges on page 3 for the setting ranges. Note: When ordering, designate the power supply specification. Different Relay models are used for 100 to 240 VAC and 24 VAC/VDC. 1 K8AK-TH Specifications Ratings Item Power supply voltage Allowable voltage range Power consumption Sensor inputs 100 to 240 VAC 50/60 Hz 24 VAC 50/60 Hz or 24 VDC 85% to 110% of power supply voltage 5 VA max. 2 W max. (24 VDC), 4 VA max. (24 VAC) K8AK-TH11S Thermocouple: K, J, T, E; Platinum-resistance thermometer: Pt100, Pt1000 K8AK-TH12S Thermocouple: K, J, T, E, B, R, S, PLII Contact input ON: 1 k max., OFF: 100 k min. Non-contact input ON residual voltage: 1.5 V max., OFF leakage current: 0.1 mA max. Output relay One SPDT relay (5 A at 250 VAC, resistive load) External inputs (for latch setting) Leakage current: Approx. 10 mA Setting method Rotary switch setting (set of three switches) Indicators Power (PWR): Green LED, Relay output (ALM): Red LED Other functions Alarm Mode (upper limit/lower limit), non-fail safe/fail safe selection, output latch, setting protection, temperature unit C/F Ambient operating temperature -20 to 55C (with no condensation or icing) Ambient operating humidity Relative humidity: 25% to 85% Storage temperature -25 to 65C (with no condensation or icing) Characteristics Measurement accuracy K8AK-TH11S: 1% of the setting range or 4C, whichever is larger K8AK-TH12S: 1% of the setting range (1% FS) hysteresis width 2C Output relay Rated load Resistive load 5 A at 250 VAC 5 A at 30 VDC Maximum switching capacity: 1,250 VA, 150 W Minimum load: 5 VDC, 10 mA (reference values) Mechanical life: 10 million operations min. Electrical life: 5 A at 250 VAC or 30 VDC: 50,000 operations 3 A at 250 VAC/30 VDC: 100,000 operations Sampling cycle 100 ms Insulation resistance 20 M (at 500 V) between charged terminals and exposed uncharged parts 20 M (at 500 V) between any charged terminals (i.e., between input, output, and power supply terminals) 20 M (at 500 V) between contacts (open) Dielectric strength 2,300 VAC, 50/60 Hz for 1 min between terminals of different charge Vibration resistance Vibration of 10 to 55 Hz and acceleration of 50 m/s2 for 5 min with 10 sweeps each in X, Y, and Z directions Shock resistance 100 m/s2, 3 times each in 6 directions along 3 axes Weight Approx. 160 g Degree of protection IP20 Memory protection Non-volatile memory (number of writes: 1 million) Safety Standards Approved standards UL 61010-1 Installation environment (pollution level 2, installation category II) EMC EN 61326-1 Application standards 2 UL 61010-1, Korean Radio Waves Act (Act 10564), CSA: C22.2 No.14, CCC: GB14048.5 Terminal screw tightening torque 0.49 to 0.59 N*m Crimp terminals Two solid wires of 2.5 mm2 or two ferrules of 1.5 mm2 with insulation sleeves can be tightened together. Case color N1.5 Case material PC and ABS, UL 94 V-0 Mounting Mounts to DIN Track. Dimensions 22.5 x 100 x 90 mm (W x D x H) K8AK-TH Setting Ranges K8AK-TH11S Centigrade Input 1,000 800 600 400 200 0 Setting temperature range K J T E Pt100 Pt1000 999 850 400 600 850 850 0 0 0 0 0 0 Minimum setting increment 1C Fahrenheit Input 1,000 800 600 400 200 0 Setting temperature range K J T E Pt100 Pt1000 999 999 700 999 999 999 A@ A@ A@ A@ A@ 0 0 0 0 0 0 Minimum setting increment 1F K8AK-TH12S Centigrade Input Setting temperature range 1,800 1,700 1,600 1,500 1,400 1,300 1,200 1,100 1,000 900 800 700 600 500 400 300 200 100 0 K J T E B R S 1,700 1,700 PLII 1,800 1,300 1,300 850 600 400 100 0 0 0 0 Minimum setting increment 0 0 0 R S PLII 3,000 3,000 10C Fahrenheit Input Setting temperature range 3,200 3,100 3,000 2,900 2,800 2,700 2,600 2,500 2,400 2,300 2,200 2,100 2,000 1,900 1,800 1,700 1,600 1,500 1,400 1,300 1,200 1,100 1,000 900 800 700 600 500 400 300 200 100 0 K J T E B 3,200 2,300 2,300 1,500 1,100 700 300 0 0 0 0 Minimum setting increment 0 0 Upper limit 1320 870 420 620 1820 1720 1720 1320 Lower limit -40 -40 -40 -40 0 -40 -40 -40 0 10F Temperature Input Range TH11S Input type K J T E Pt100 Pt1000 ----- C Lower limit -20 -20 -20 -20 -20 -20 ----- F Upper limit 1019 870 420 620 870 870 ----- Lower limit -40 -40 -40 -40 -40 -40 ----- Upper limit 1039 1039 740 1039 1039 1039 ----- TH12S Input type K J T E B R S PLII C Lower limit -20 -20 -20 -20 0 -20 -20 -20 F Upper limit 2340 1540 740 1140 3240 3040 3040 2340 3 K8AK-TH Connections Wiring Diagrams K8AK-TH11S K8AK-TH12S Power supply voltage*1 Power supply voltage*1 Not used. Power supply Relay output A1 Not used. A2 Power supply 14 11 12 Relay output A1 A2 14 11 12 *1 The input power supply depends on the model: 100 to 240 VAC or 24 VAC/VDC (no polarity) External input (LATCH_RST)*2 Sensor input 4 5 6 1 2 3 + Thermocouple B Sensor input - B A + Timing Charts Temperature Alarm: Hysteresis: 2C/F Temperature setting 2C (F) 2C (F) Temperature alarm upper limit (11) to (14) Temperature alarm lower limit (11) to (14) Changing between Normally Open and Normally Closed Power supply Temperature alarm or other error Relay output (normally open) (11) to (14) Relay output (normally closed) (11) to (14) * Other errors: sensor open circuit error, sensor input error, temperature setting error, and memory error. Latched Operation: Relay outputs remain latched even after the alarm or error is reset. Power supply Temperature alarm or other error LATCH_RST or external inputs (4) to (5) Relay output (latched) (11) to (14) 0.02 s * To enter SV Protect Mode or reset the latch, turn ON the LATCH_RST signal or external input for at least 5 seconds. Operation of Indicators Power supply SV Protect Mode Flashing PWR indicator Power supply Temperature alarm Other error 4 4 5 6 Not used. 1 2 3 Not used. - Thermocouple Pt resistance thermometer input ALM indicator *2 External input (LATCH_RST)*2 Not used. Flashing Wiring of the external input terminals is as shown below. K8AK-TH Nomenclature Front Operations Error (ALM indicator: Flashing) Power supply Relay output R_SW3 Temperature unit (Black out the unnecessary label: C or F) PWR Indicator (Green) R_SW2 ALM indicator (Red) R_SW1 LATCH_RST button* External input (LATCH_RST) Sensor input One of the following items 1 to 3 has occurred. 1. The sensor circuit is disconnected or the temperature setting is out of the specified range. 2. The temperature setting is out of the specified range. 3. There is a problem in the internal circuits. Corrections 1. Disable SV Protect Mode. 2. Disable the latch. 3. Check for incorrect wiring, circuit disconnections, short circuits, and whether the input type and temperature settings are correct. 4. If the wiring and settings are correct, reset the power supply. If the Unit resumes normal operation, the problem may have been caused by noise. If the Unit does not resume normal operation, it must be replaced. * The non-volatile memory stores the event when a latched output is disabled, or the SV Protect Mode is enabled or disabled. An error may occur if the data is updated more than one million times. * If you press and hold the LATCH_RST button for 5 seconds or longer, the SV Protect Mode will go into effect. When SV Protect Mode is enabled, the PWR indicator flashes. To disable the SV Protect Mode, press and hold the LATCH_RST Button for at least 5 seconds. Alarm Setting Rotary Switch Point the arrow to the required number. Note: 1. Use solid-core wires of 2.5-mm2 max. or ferrules with an insulation sleeve to wire to this terminal. To ensure the dielectric strength of the connection, do not expose more than 8 mm of wire for insertion into the terminal. For a solid wire of 2.5-mm2 of max. For ferrules with an insulation sleeve. 8 mm max. 8 mm max. Recommended Ferrules Phoenix Contact Al 1.5-8BK (for AWG16) *Al 1-8RD (for AWG18) *Al 0,75-8GY (for AWG18) 2. Screw tightening torque: 0.49 to 0.59 N*m 5 K8AK-TH Operation Method Function Selection DIP Switch Settings K8AK-TH11S R_SW3 100C/F units (0 to 9) R_SW2 10C/F units (0 to 9) R_SW1 1C/F units (0 to 9) K8AK-TH12S occurs if this switch is set to a value from 4 to 9. * Default: 0C SW 1 2 3 4 Switch (SW) ON OFF * Default settings: All OFF Turn OFF the power to the Temperature Monitoring Relay before you change the switch settings on the side panel. The switch settings made on the side panel take effect when the power is turned ON. Use a precision screwdriver to manipulate the switches and button. R_SW2 100C/F units (0 to 9) R_SW1 10C/F units (0 to 9) * Default: 0C 5 6 7 Upper limit alarm Input type Lower limit alarm K With latching J Without latching T Energized E ON Pt100 OFF Non-energized 1,000C/F units (0 to 3) R_SW3 * A temperature setting error SW 1 2 3 4 5 6 7 Upper limit alarm Input type Lower limit alarm K With latching J Without latching T C Pt1000 Energized E ON F Not used. Non-energized B OFF Not used. C R * Default: All OFF. * SW8: Not used. S F PLII * Default: All OFF. * SW8: Not used. Safety standards EN 61010-1 EMC 6 EMI EN 61326-1 EMS EN 61326-1 K8AK-TH Functions SV Protection This function protects (i.e., prohibits changing) the alarm setting, operating method, and modes for the Temperature Monitoring Relay that have been set on the rotary switches and DIP switch. The protection function is activated by pressing the output latch reset button on the Temperature Monitoring Relay for at least 5 s or by turning ON the input to the external input terminal for at least 5 s. The power indicator will flash when the protection is activated. The protection function can be released by pressing the output latch reset button on the Temperature Monitoring Relay for at least 5 s or by turning ON the input to the external input terminal for at least 5 s. The power indicator will light while the protection is being reset. Dimensions (Unit: mm) Note: All units are in millimeters unless otherwise indicated. Temperature Monitoring Relay K8AK-TH 22.5 100 90 5 Track Mounting Products (Sold Separately) DIN Tracks PFP-100N PFP-50N 7.30.15 4.5 350.3 15 25 10 25 25 1000 (500) (See note.) 10 25 15 (5) (See note.) 270.15 1 * Dimensions in parentheses are for the PFP-50N. 7 K8AK-TH Safety Precautions Be sure to read the precautions for all models in the website at the following URL: http://www.ia.omron.com/. Warning Indications CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or in property damage. Precautions for Safe Use Supplementary comments on what to do or avoid doing, to use the product safely. Precautions for Correct Use Supplementary comments on what to do or avoid doing, to prevent failure to operate, malfunction, or undesirable effects on product performance. Meaning of Product Safety Symbols CAUTION Electrical shock may cause minor injury. Do not touch terminals while electricity is being supplied. There is a risk of minor electrical shock, fire, or device failure. Do not allow any pieces of metal, conductors, or cutting chips that occur during the installation process to enter the product. Explosions may cause minor injuries. Do not use the product in locations with inflammable or explosive gases. Used to warn of the risk of electric shock under specific conditions. There is a risk of minor electrical shock, fire, or device failure. Do not disassemble, modify, repair, or touch the inside of the product. Used for general prohibitions for which there is no specific symbol. Loose screws may cause fires. Tighten terminal screws to the specified torque of 0.49 to 0.59 N*m. Used to indicate prohibition when there is a risk of minor injury from electrical shock or other source if the product is disassembled. Used for general mandatory action precautions for which there is no specified symbol. Use of excessive torque may damage the terminal screws. Tighten terminal screws to the specified torque of 0.49 to 0.59 N*m. If the setting does not match the element to be monitored, the product may behave unexpectedly and damage the machine or cause accidents. Set the Temperature Monitoring Relay as described below. * Adjust each set value on the Temperature Monitoring Relay correctly for the element that is to be monitored. * Turn OFF the power to the Temperature Monitoring Relay before you change the switch settings on the side panel. The switch settings made on the side panel take effect when the power is turned ON. If the Temperature Monitoring Relay fails, monitoring and alarm outputs may fail to operate. This may result in physical damage to the facilities, equipment, or other devices that are connected to it. To reduce this risk, inspect the product regularly. To make the product fail-safe, take alternative safety measures, such as the installation of monitoring devices on a separate circuit. Use of the product beyond its life may result in contact welding or burning. Make sure to consider the actual operating conditions and use the product within its rated load and electrical life count. The life of the output relay varies significantly with the switching capacity and switching conditions. 8 K8AK-TH Precautions for Safe Use 1. Do not use or store the product in the following locations. * Locations subject to water or oil * Locations subject to direct radiant heat from heating equipment * Outdoor locations or under direct sunlight * Locations subject to dust or corrosive gases (particularly sulfurizing gases, ammonia, etc.) * Locations subject to rapid temperature changes * Locations prone to icing and dew condensation * Locations subject to excessive vibration or shock 2. Use and store the product in a location where the ambient temperature and humidity are within the specified ranges. If applicable, provide forced cooling. 3. Mount the product in the correct direction. 4. Check terminal polarity when wiring and wire all connections correctly. The power supply terminals do not have polarity. 5. Do not wire the input and output terminals incorrectly. 6. Make sure the power supply voltage and loads are within the specifications and ratings for the product. 7. Make sure the type of the thermocouple matches the input type that the Temperature Monitoring Relay is designed for. 8. If you need to extend the length of the lead wires on the thermocouple, make sure to match the type of thermocouple and always use compensating conductors. 9. To extend the lead wires on the platinum resistance thermometer, use lead wires with a low resistance (5 or less per wire), and make the resistance equal on all three lead wires. 10.Make sure the crimp terminals for wiring are of the specified size. 11.Do not connect anything to terminals that are not being used. 12.Use a power supply that will reach the rated voltage within 1 second after the power is turned ON. 13.After you turn ON the power, it takes 2 seconds for the outputs of the Temperature Monitoring Relay to stabilize. Take this time into account when you design the control panel. 14.Allow at least 30 minutes for the product to warm up. During this time, the temperature measurements will be incorrect. 15.Keep wiring separate from high voltages and power lines that draw large currents. Do not place product wiring in parallel with or in the same path as high-voltage or high-current lines. 16.Do not install the product near equipment that generates high frequencies or surges. 17.The product may cause incoming radio wave interference. Do not use the product near radio wave receivers. 18.Install an external switch or circuit breaker and label it clearly so that the operator can quickly turn OFF the power supply. 19.When cleaning the product, do not use thinners or solvents. Use commercial alcohol. 20.When discarding the product, properly dispose of it as industrial waste. 21.Make sure the power and output indicators operate correctly. Depending on the application environment, the indicators and other plastic parts may wear prematurely and become difficult to see. Check and replace these parts regularly. 22.The terminal blocks may heat up to 65C. Use care when handling them. Precautions for Correct Use Observe the following operating methods to prevent failure and malfunction. 1. Use the power supply voltage, input power, and other power supplies and converters with suitable capacities and rated outputs. 2. Use a precision screwdriver or similar tool to adjust the rotary switches. Mounting and Removing * Mounting to DIN Track 1. Catch the upper hook on the DIN Track. 2. Push the product onto the Track until the hooks lock into place. A B * Removing from the DIN Track Pull down on the bottom hook with a flat-blade screwdriver and lift up on the product. Applicable DIN Tracks: PFP-100N (100 cm) PFP-50N (50 cm) 9 MEMO 10 Terms and Conditions of Sale 1. Offer; Acceptance. 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Printed on recycled paper. (c) 2014 Omron Electronics LLC Printed in U.S.A. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Omron: K8AK-TH12S 100-240VAC K8AK-TH11S24VAC/DC K8AK-TH12S 24VAC/DC K8AK-TH11S100-240 VAC K8AKPA2 380/480VAC K8AK-PA1 200/240VAC