Rockwell Automation 1747-ACNR15 ControlNet Adapter Module User Manual - Manual (Page 105)

Publication 1747-UM003A-EN-P
Understanding Your SLC 500/1746 Control System B-13
Emergency-Stop Switches
Adhere to the following points concerning Emergency-Stop switches:
•
Do not program Emergency-Stop switches in the 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. See the
following schematics.
IMPORTANT
The illustrations only show output circuits with Master
Control Relay (MCR) protection. In most applications
input circuits do not require MCR protection; however, if
you need to remove power from all field devices, you must
include MCR contacts in series with input power wiring.