Rockwell-automation 1766-Lxxxx MicroLogix 1400 Programmable Controller User Manual download pdf (Page 40)

26 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Chapter 2 Install Your Controller

Connecting Expansion I/O

The expansion I/O module is attached to the controller or another I/O module

by means of a flat ribbon cable after mounting, as shown below.

TIP

Use the pull loop on the connector to disconnect modules. Do not pull

on the ribbon cable.

TIP

Up to seven expansion I/O modules can be connected to a controller.

ATTENTION: Remove power before removing or inserting an I/O

module. When you remove or insert a module with power applied,

an electrical arc may occur. An electrical arc can cause personal

injury or property damage by:

• sending an erroneous signal to your system’s field devices,

causing the controller to fault

• causing an explosion in a hazardous environment

Electrical arcing causes excessive wear to contacts on both the

module and its mating connector. Worn contacts may create electrical

resistance, reducing product reliability.

WARNING: EXPLOSION HAZARD

In Class I, Division 2 applications, the bus connector must be fully

seated and the bus connector cover must be snapped in place.

In Class I, Division 2 applications, all modules must be mounted in

direct contact with each other as shown on page 26. If DIN rail

mounting is used, an end stop must be installed ahead of the

controller and after the last 1762 I/O module.

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