Rockwell Automation 1790-TXXXX Digital Expansion Terminal Block Compact Block LDX I/O - Manual (Page 10)

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Publication 1790-IN005B-EN-P - April 2003
Wire the Expansion Blocks
The following figures show the wiring information for the
expansion blocks.
1790-T16BVOX Input Expansion Block Wiring Diagram
• For inputs 0-7: Sinking inputs - wire COM 0 (pin 9) to Field Power (-) GND
Sourcing inputs - wire COM 0 (pin 9) to Field Power (+) 24V dc
• For inputs 8-15: Sinking inputs - wire COM 1 (pin 11) to Field Power (-) GND
Sourcing inputs - wire COM 1 (pin 11) to Field Power (+) 24V dc
Note: both COM 0 are internally connected - COM 0 is used for inputs 0-7, COM
1 is used for inputs 8-15. Both COM 1 are internally connected.
1790-T8BV8VX Input/Output Expansion Block Wiring Diagram
• Sinking inputs - wire COM (pin 9) to Field Power (-) GND
Sourcing inputs - wire COM (pin 9) to Field Power (+) 24V dc
Note: both COM (pins 9 and 10) are internally connected.
• Sinking outputs -wire VDC (pin 11) to Field Power (+) 24Vdc,
wire GND (pin 12) to Field Power (-) GND
20 18 16 14 12 10 8 6 4 2
19 17 15 13 11 9 7 5 3 1
IN15 IN11 COM1 IN7 IN3
IN13 IN9 COM0 IN5 IN1
IN12 IN8 COM0 IN4 IN0
IN14 IN10 COM1 IN6 IN2
20 18 16 14 12 10 8 6 4 2
19 17 15 13 11 9 7 5 3 1
OUT7 OUT3 GND IN7 IN3
OUT5 OUT1 COM IN5 IN1
OUT4 OUT0 COM IN4 IN0
OUT6 OUT2 VDC IN6 IN2