Allen-Bradley 1790-T0A8X, Installation Instructions Manual, Page: 10 / 20

10 Digital Expansion Terminal Block CompactBlock LDX I/O
Publication 1790-IN005C-EN-P - January 2015
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 (+) 24V DC, wire GND
(pin 12) to Field Power (-) GND.
1790-T8BV8BX 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.
• Sourcing outputs – wire VDC (pin 11) to Field Power (+) 24V DC, 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
OUT7 OUT3 GND
IN7 IN3
OUT5
OUT1 COM IN5 IN1
OUT4 OUT0 COM IN4 IN0
OUT6 OUT2 VDC 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