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Rockwell Automation Publication 2080-UM002L-EN-E - November 2021
Chapter 2 About Your Controller
RMCC EtherNet/IP Example – Verify Address Change
Safety Considerations
Safety considerations are an important element of proper system installation.
Actively thinking about the safety of yourself and others, as well as the
condition of your equipment, is of primary importance. We recommend
reviewing the following safety considerations.
Disconnect Main Power
The main power disconnect switch should be located where operators and
maintenance personnel have quick and easy access to it. In addition to
disconnecting electrical power, all other sources of power (pneumatic and
hydraulic) should be de-energized before working on a machine or process
controlled by a controller.
Safety Circuits
Circuits installed on the machine for safety reasons, like overtravel limit
switches, stop push buttons, and interlocks, should always be hard-wired
directly to the master control relay. These devices must be wired in series so
that when any one device opens, the master control relay is de-energized,
thereby removing power to the machine. Never alter these circuits to defeat
their function. Serious injury or machine damage could result.
WARNING:
Explosion Hazard
Do not replace components, connect equipment, or disconnect equipment unless
power has been switched off.
WARNING:
Explosion Hazard
Do not connect or disconnect connectors while circuit is live.
