User guide

Hardware Installation

890 USE 108 00 August 2001 123

Inserting Modules in the Backplane(s)

Module

Placement in

Backplanes

The Compact Controllers and the A120 I/O modules are designed for easy

installation. The controller is installed in the first slot in a primary backplane, and I/O

modules may be installed in any other slots in a primary or secondary backplane.

Attach the module to a hook at the top of the DTA backplane and drop it into the

housing. The 20-pin bus connector on the back of the module mates with the 20-

receptacle connector on the backplane, and the metal spring-loaded wire on the

back of the module passes through a hole in the backplane to make ground contact

with the DIN rail. Tighten the screw at the bottom of the module to fasten it to the

backplane.

This shows the two connection points.

CAUTION

We recommend that you use solid wire for all terminal

connections.

Neat and proper workmanship methods by qualified personnel must be

employed when making connections to all system modules. Take extra

precautions if you are using stranded wire, ensure that loose or

projecting strands do not short circuit or ground other terminals.

Failure to observe this precaution can result in injury or

equipment damage.