Specifications

SLC 500 Programmable Controllers and I/O Modules

I/O Wiring

Terminals on the 4-, 8-, 12- and 16-point modules have self-lifting pressure plates that accept two

14 AWG (2mm2) wires. All 16-point I/O modules, 1746-OX8, -OB6EI, -OBP8, -OAP12, -IO12 and

IO12DC are equipped with color-coded removable terminal blocks.

32-point I/O modules are equipped with a 40-pin, MIL-C-83503 type header and a removable

wiring connector (1746-N3). The connector can be assembled with the wire type and length of your

choice. Wiring the 16- and 32-point modules can also be done with a Catalog 1492 Interface

module and pre-wired cable.

1492 Wiring System

The Bulletin 1492 Digital Programmable Controller Wiring System Product Line consists of IFMs

(Interface Modules), Pre-Wired Cables and Ready-to-Wire Cables. These products aid in the installation of Allen-Bradley

Programmable Controller I/O Modules. IFMs and pre-wired cables replace terminal blocks and up to 50% of the point-to-point wiring

between the programmable controller and field devices. They are available for over 60 different 1746 SLC 500, 1756 ControlLogix,

and 1771 PLC Digital I/O Isolated and Non-Isolated Modules. IFMs allow you to conveniently incorporate additional terminations,

LED status indicators or over current protection into your I/O circuitry.

Features

• Faster Installation Time: Pre-wired cables have the I/O module terminal block or

wiring arm already wired-up on one end and a cable connector on the other.

No need to measure, cut, strip, label, and terminate 20 to 40 wires per I/O module.

• Successful System Start-ups: The pre-wired cables are 100% tested for continuity.

No more crossed wires and loose connections between the I/O module and the

terminal blocks on the DIN rail.

• Simplified Troubleshooting: IFMs with optional LED indicators provide the field-side

status of the I/O circuitry. No more guesswork determining where a problem resides.

• Reduced Panel Space: Extra terminal, sensor, and fusible IFMs have terminals

for connecting the I/O points. In addition, they contain common terminals that

are used as power busses for field input and output devices. No additional

terminal blocks are needed to provide power to the field-devices.

• Quality-Looking Panel: The pre-wired cables and IFMs organize your wiring and

terminations for a consistent look to your panel. Pre-printed adhesive labels for the

terminal wiring neatly identify field-side connections.