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Hardware – Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers User Manual

Page 21

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Installing Your Controller

1–5

Using Emergency-Stop Switches

When using emergency-stop switches, adhere to the following points:

Do not program emergency-stop switches in the controller program. Any
emergency-stop switch should turn off all machine power by turning off the
master control relay.

Observe all applicable local codes concerning the placement and labeling of
emergency-stop switches.

Install emergency-stop switches and the master control relay in your system.
Make certain that relay contacts have a sufficient rating for your application.
Emergency-stop switches must be easy to reach.

In the following illustration, input and output circuits are shown with MCR
protection. However, in most applications, only output circuits require MCR
protection.

Hardware