Spectrum Controls 1746sc-INI4vi - Manual (Page 52)

48 SLC 500 ™ Isolated Analog Input Modules
Standing Clear Of Machinery – When troubleshooting a problem with
any SLC 500 system, have all personnel remain clear of machinery. The
problem may be intermittent, and the machine may move unexpectedly.
Have someone ready to operate an emergency stop switch.
CAUTION
POSSIBLE EQUIPMENT OPERATION
Never reach into a machine to actuate a switch. Also,
remove all electrical power at the main power disconnect
switches before checking electrical connections or inputs/
outputs causing machine motion.
Failure to observe these precautions can cause personal injury
or equipment damage.
Safety Circuits – Circuits installed on machinery for safety reasons (like
over-travel limit switches, stop push-buttons, and interlocks) should
always be hard-wired to the master control relay. These circuits should
also be wired in series so that when any one circuit opens, the master
control relay is de-energized, thereby removing power. Never modify
these circuits to defeat their function. Serious injury or equipment
damage may result.
Refer to your system’s Installation & Operation Manual for more
information.
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