ALLEN BRADLEY 1747-L551 PLC Processor

Wiring Your I/O Modules
7–7
Wiring Your I/O Modules
Terminals on the modules have self-lifting pressure plates that accept
2 #14 AWG wires. Series B 12-point and 16-point and analog
modules are equipped with removable terminal blocks for ease of
wiring. The plug for the removable terminals is also color coded:
red (AC), blue (DC), orange (relay), or green (specialty).
LED indicators on the front of each module display the status of each
I/O point. The LED indicators illuminate when the proper signal to
an input terminal is applied or when the processor commands an
output to be energized.
To locate the I/O module wiring diagrams, contact your
Allen-Bradley sales office for the latest product data entitled Discrete
Input and Output Modules, Publication Number 1746-2.35. Or,
locate the installation instruction sheet that was sent with your I/O
module; it also includes I/O wiring diagrams.
1. Install a tie wire to secure your wiring and keep it neat. (If you
feed the tie into one hole, it will be routed back out through the
other.)
OUTPUT INPUT
0 4
1 5
23
0 4
1 5
23
Tie Wire
Wires Leading to Output
and Input Devices
2. Cover any unused slots with card slot fillers
(Catalog Number 1746-N2) to keep the chassis free from debris
and dust.
Publication 1747-6.2