Encoders Bulletin 845G Optical Absolute Encoders NEMA Type 4/Type13, Single-Turn, Size 25 Specifications Electrical Code Format Resolution Counts per Rev. (CPR) Accuracy 16K words/sec 40ms Power Requirements Determined by Catalog Number: 5V DC 5% @ 150mA maximum 8-24V DC @ 150mA maximum 10-30V DC @ 150mA maximum Output Format Description S Absolute gray code or natural binary output S 8-15 bit resolution (256 to 32,768) S Open collector, TTL, push-pull or SSI outputs S Low or high true output optional S NEMA Type 4 and 13 S Reverse polarity protection S Optional 5V or 8-24V power supply S 0 to 70C operating temperature S CE marked for all applicable directives 1 bit Power Up Time Delay Output Drive Capability Features 256 CPR (8 bit); 360 CPR (9 bit); 512 CPR (9 bit); 1024 CPR (10 bit); 2048 CPR (11 bit); 4096 CPR (12 bit); 8192 CPR (13 bit); 16384CPR (14 bit); 32768 CPR (15 bit) Frequency Response Square Flange Mount 845G-F3G5HC1024R Bulletin 845G is a heavy duty NEMA Type 4 and 13 single-turn absolute encoder that digitizes shaft position. The absolute encoder has a unique digital output for each shaft position. The use of absolute encoders assures that true position is available, regardless of power interruptions. Gray Code or Natural Binary (parallel or serial) Latch Command Direction Control 16mA Parallel GRAY or Natural Binary Logic "0" = 0.0 to 0.6V DC Logic "1" = 3.5 to 5V DC (TTL) Logic "1" = 24V DC maximum (Open Collector) SSI RS-422 compatible Standard with Natural Binary Logic "0" = outputs active (DC common) Logic "1" = outputs latched (+DC or open) Field selectable for increasing counts (CW or CCW) Mechanical Starting Torque Typical 2.5Ncm (3.5in-oz) Running Torque Typical 2.5Ncm (3.5in-oz) Shaft Loading Axial 89N [20lbs]; Radial 178N [40lbs] Shaft Size 9.517mm diameter [3/8in] w/flat Moment of Inertia 15gcm2 (2.1 x 10-4oz-in-sec2) Slew Speed 5000 RPM Environmental Housing Temperature Humidity Shock Vibration Approximate Ship Weight NEMA Type 4, 13, IP66 (IEC 529) 0_C to +70_C (+32_F to +158_F)--Operating -25_C to +90_C (-13_F to +194_F)--Storage 98%, noncondensing 50g (11ms duration) 20g (10-150Hz) 0.91kg (2lbs) Accessories Description Page Number Flexible Couplings 7-50 Measuring Wheels 7-51 Servo Clamps 7-51 Pre-Wired Cables 7-52 Mating Connectors 7-55 Mounting Plates 7-55 IMPORTANT NOTICE Certain features of the 845G were not available for purchase at the time this catalog was printed. For current availability, please visit the Rockwell Automation/ Allen-Bradley website at: http://www.ab.com/sensors/products/productlines/encoders/encoders.html 7-26 Encoders Bulletin 845G Optical Absolute Encoders NEMA Type 4/Type13, Single-Turn, Size 25 Selection Guide 845G -- F 3 G 8 H C 1024 a b c d e R f a g d Mounting Configuration f Resolution Output Logic Code Description Code Description Code F Square Flange H High True 0256 8 bit/0-255 S English Servo L Low True E 0360 0512 9 bit/0-359 I 9 bit/0-511 e 1024 10 bit/0-1023 Output Configuration 2048 11 bit/0-2047 4096 12 bit/0-4095 I b Output Code Type Code Description B Natural Binary EI G Gray Code c Description Code Description 8192 13 bit/0-8191 I C NPN Open Collector 24V DC Max 016K 14 bit/0-16,383 I P Push-Pull (7272) I 032K 15 bit/0-32,767 I S SSI Output II T 5V DC TTL NPN g Power Supply Connector Options Code Description Code Description 5 5V DC 5% A Axial Connector (End) 8 8-24V DC R Radial Connector (Side) A 10-30V DC I S Axial 17-pin I T Axial 12-Connector II U Radial 12-Connector II E Latch control standard. E Not available with push-pull output. I Requires 8-24V DC power supply. I Excess 76 used for gray code. I Only available with SSI output. I IMPORTANT NOTICE: These features were not available for purchase at the time this catalog was printed. For current availability, please visit the Allen-Bradley website at: http://www.ab.com/sensors/products/productlines/encoders/encoders.html Push-pull output and 10-30V DC power supply may only be ordered together. 7-27 Encoders Bulletin 845G Optical Absolute Encoders NEMA Type 4/Type13, Single-Turn, Size 25 Electrical Connections--19-Pin Connector 845-CA-D-_ Wire Color 32768 (15 Bit) 16384 (14 Bit) 8192 (13 Bit) Brown G(0) or 20 G(0) or 20 G(0) or 20 N/C Orange G(1) or 21 G(1) or 21 G(1) or 21 G(0) or 20 Yellow G(2) or 22 G(2) or 22 G(2) or 22 G(1) or 21 Green G(3) or 23 G(3) or 23 G(3) or 23 E Blue G(4) or 24 G(4) or 24 F Violet G(5) or 25 G(5) or 25 G Gray G(6) or 26 H White J Pin 2048 (11 Bit) 1024 (10 Bit) 512 (9 Bit) 360 (9 Bit) 0256 (8 Bit) N/C G(0) or 20 G(0) or 20 G(0) or 20 G(0) or 20 N/C G(1) or 21 G(1) or 21 G(1) or 21 G(1) or 21 G(0) or 20 G(2) or 22 G(2) or 22 G(2) or 22 G(2) or 22 G(2) or 22 G(1) or 21 G(3) or 23 G(3) or 23 G(3) or 23 G(3) or 23 G(4) or 24 G(3) or 23 G(2) or 22 G(4) or 24 G(4) or 24 G(4) or 24 G(4) or 24 G(5) or 25 G(4) or 24 G(3) or 23 G(5) or 25 G(5) or 25 G(5) or 25 G(5) or 25 G(6) or 26 G(6) or 26 G(5) or 25 G(4) or 24 G(6) or 26 G(6) or 26 G(6) or 26 G(6) or 26 G(7) or 27 G(7) or 27 G(7) or 27 G(6) or 26 G(5) or 25 G(7) or 27 G(7) or 27 G(7) or 27 G(7) or 27 White/Orange G(8) or 28 G(8) or 28 G(8) or 28 G(7) or 27 G(6) or 26 G(8) or 28 G(8) or 28 G(8) or 28 N/C K White/Brown G(9) or 29 G(9) or 29 G(9) or 29 G(8) or 28 G(7) or 27 G(9) or 29 N/C N/C N/C L White/Red G(10) or 210 G(10) or 210 G(10) or 210 G(9) or 29 G(8) or 28 MSBC MSBC MSBC MSBC M White/Yellow G(11) or 211 G(11) or 211 G(11) or 211 G(10) or 210 G(9) or 29 N/C N/C N/C N/C N White/Green G(12) or 212 G(12) or 212 G(12) or 212 G(11) or 211 G(10) or 210 N/C N/C N/C N/C P White/Blue G(13) or 213 G(13) or 213 N/C MSBC MSBC N/C N/C N/C N/C R White/Black G(14) or 214 Zero Set E Zero Set E Zero Set E Zero Set E Zero Set E Zero Set E Zero Set E Zero Set E S White/Violet MSBC MSBC MSBC N/C N/C N/C N/C N/C N/C T Black DC Common DC Common DC Common DC Common DC Common DC Common DC Common DC Common DC Common U White/Gray Latch Control Latch Control Latch Control Latch Control Latch Control Latch Control Latch Control Latch Control Latch Control V Red +DC +DC +DC +DC +DC +DC +DC +DC +DC A B C D 4096 (12 Bit) Electrical Connections--17-Pin Connector E Pin 845-CA-H-__ Wire Color 8192 (13 Bit) 4096 (12 Bit) 2048 (11 Bit) 1024 (10 Bit) 512 (9 Bit) 360 (9 Bit) 0256 (8 Bit) A White/Orange G(0) or 20 G(0) or 20 G(0) or 20 G(0) or 20 G(0) or 20 G(0) or 20 G(7) or 27 B White G(1) or 21 G(1) or 21 G(1) or 21 G(1) or 21 G(1) or 21 G(1) or 21 G(6) or 26 C Gray G(2) or 22 G(2) or 22 G(2) or 22 G(2) or 22 G(2) or 22 G(2) or 22 G(5) or 25 D Violet G(3) or 23 G(3) or 23 G(3) or 23 G(3) or 23 G(3) or 23 G(3) or 23 G(4) or 24 E Blue G(4) or 24 G(4) or 24 G(4) or 24 G(4) or 24 G(4) or 24 G(4) or 24 G(3) or 23 F Yellow G(5) or 25 G(5) or 25 G(5) or 25 G(5) or 25 G(5) or 25 G(5) or 25 G(2) or 22 G Orange G(6) or 26 G(6) or 26 G(6) or 26 G(6) or 26 G(6) or 26 G(6) or 26 G(1) or 21 H Brown G(7) or 27 G(7) or 27 G(7) or 27 G(7) or 27 G(7) or 27 G(7) or 27 G(0) or 20 J White/Violet G(8) or 28 G(8) or 28 G(8) or 28 G(8) or 28 G(8) or 28 G(8) or 28 N/C White/Brown G(9) or 29 G(9) or 29 G(9) or 29 G(9) or 29 N/C N/C N/C L White/Green G(10) or 210 G(10) or 210 G(10) or 210 N/C N/C N/C Zero Set M White/Yellow G(11) or 211 G(11) or 211 N/C N/C N/C N/C MSBC N White/Red G(12) or 212 Zero Set Zero Set Zero Set Zero Set Zero Set Latch Control K P White/Blue Latch Control Latch Control Latch Control Latch Control Latch Control Latch Control N/C R Black DC Common DC Common DC Common DC Common DC Common DC Common DC Common S Red +DC +DC +DC +DC +DC +DC +DC T Green MSBC MSBC MSBC MSBC MSBC MSBC Case Ground E IMPORTANT NOTICE: These features were not available for purchase at the time this catalog was printed. For current availability, please visit the Allen-Bradley website at: http://www.ab.com/sensors/products/productlines/encoders/encoders.html 7-28 Encoders Bulletin 845G Optical Absolute Encoders NEMA Type 4/Type13, Single-Turn, Size 25 Electrical Connections for SSI Output--12 Pin Connector E Catalog Number Wire Pair Wire Color Red/Bl ck/Shield Red/Black/Shield White/Black/Shield White/Bl ck/Shield 845-CA-G- 845-CA-G-__ (With 12 pin connector) Bl e/Bl ck/Shield Blue/Black/Shield Green/Bl ck/Shield Green/Black/Shield MSBC Pin MSBC is short for "most significant bit complement" or "direction control." In gray code models, its function is MSBC. In natural binary models, its function is direction control. Direction Control* Natural Binary E A logic "1" (+DC or open) on the MSBC pin will produce increasing counts with a counterclockwise rotation of the shaft. Function Pin Red +DC Input 8 Black DC Common 1 White Clock + 3 Black Clock - 11 Blue Data + 2 Black Data - 10 Green CW/CCW 12 Black Zero Set Pin 9 A logic "0" (DC common) on the MSBC pin will produce increasing counts with a clockwise rotation of the shaft. Gray Code Counterclockwise rotation of the shaft will produce increasing counts. For increasing counts with a clockwise rotation, use the Most Significant Bit Complement Pin instead of the Most Significant Bit Pin. See Electrical Connection table for pin designation. Zero Set Pin E Connecting the zero set pin to +DC will reset the encoder's position value to zero. CAUTION: Activating the zero reset pin results in a change of position reading. This can cause unexpected motion which could result in damage to the product, equipment, or personal injury. *Rotation is viewed from the end of the encoder shaft. E IMPORTANT NOTICE: These features were not available for purchase at the time this catalog was printed. For current availability, please visit the Allen-Bradley website at: http://www.ab.com/sensors/products/productlines/encoders/encoders.html 7-29 Encoders Bulletin 845G Optical Absolute Encoders NEMA Type 4/Type13, Single-Turn, Size 25 Dimensions--mm (inches) 58.42 (2.30) 58.42 (2.30) Axial Mount Connector Axial Mount Connector Connector Connector 63.5 (2.50) 63.5 (2.50) Radial Mount Connector Radial Mount Connector 2.54 (0.100) 2.54 (0.100) 6.35 (0.25) 7.62 (0.300) 7.62 (0.300) 0.85/0.90 (21.59/22.86) 21.59/22.86 (0.85/0.90) 31.75 (1.250) Dia. 26.21 (1.032) 31.75 (1.250) Dia. 2.31 (58.67) Dia. 63.50 (2.500) Dia. 5 (0.21) Dia.--4 Mounting Holes 8-32 UNC-2B x 4.6 (0.18) Deep on a 47.6 (1.875) Dia. Bolt Circle, 3 Places-- 120 Apart 26.21 (1.032) 52.40 (2.063) 8-32 UNC-2B x 4.6 (0.18) Deep on a 47.6 (1.875) Dia. Bolt Circle, 3 Places--120 Apart 656 (2.5) Dia. English Servo Mount 52.40 (2.063) 66.5 (2.62) Sq. Square Flange Mount 19.05 (0.75) 9.517 (0.3747) Dia. 8.636 (0.34) Shaft Dimensions Flexible Shaft Couplings Angle Parallel Off-Set 7-30 ATTENTION: Rigidly coupling the encoder shaft to the machine shaft will cause a failure in either the bearings of the encoder or the bearings of the machine shaft.