Wiring Diagrams; Labeling For Slc/Plc Systems - Allen-Bradley 1746-IA4 Installation Instructions Manual

18 Digital I/O Modules

Wiring Diagrams

The wiring diagrams in these installation instructions are examples only. It is not
necessary to connect an I/O device to each and every I/O module terminal.

Labeling for SLC/PLC Systems

In this document, 16-point I/O module wiring diagrams include both decimal and
octal numbers for I/O addressing and wire identification (see figure below). To
wire your 16-point I/O module when used in a SLC system, use the decimal
numbers in the upper left portion of each box. When used in a PLC system, use the
octal numbers in the lower right portion of the box.
As shipped from the factory, the I/O module has a decimal address label on
the inside of its door. A separate octal conversion kit can be ordered, to allow
you to convert your module to the octal system.
TIP
IMPORTANT
Decimal and Octal Labeling for 16-point I/O Modules
For SLC (decimal)
IN 14
16
For PLC (octal)
Publication 1746-IN027C-EN-P - August 2008
You can order the octal label kit from your Allen-Bradley Distributor. The
octal kit is ordered based on the catalog number of the I/O module.
Please refer to the SLC 500 Modular Hardware Style User Manual,
publication 1747-UM011, for a listing of octal label kit catalog numbers.
Be sure the octal labels are used with your PLC system. Directions on how to
install the labels are included with the kit and on page 6 of this document.
L1
100/120V ac
L2
1746-IA16
100/120V ac
IN 0
IN 2
IN 4
IN 6
IN 8
IN 10
IN 12
IN 14
AC COM
Internally Connected
Commons
IN 1
0
1
IN 3
2
3
IN 5
4
5
IN 7
6
7
IN 9
10
11
IN 11
12
13
IN 13
14
15
IN 15
16
17
AC COM
SLC
PLC