Rockwell Automation 1747-L5xx SLC 500 Modular Hardware Style User Manual - Manual (Page 73)

Publication 1747-UM011G-EN-P - June 2008
System Installation Recommendations 73
out, it no longer provides any safety protection. These switches should be
tested periodically to assure they will stop machine motion when needed.
Preventive Maintenance The printed circuit boards of the controller must be protected from dirt, oil,
moisture and other airborne contaminants. To protect these boards, the
controller must be installed in an enclosure suitable for the environment. The
interior of the enclosure should be kept clean and the enclosure door should
be kept closed whenever possible.
Regularly inspect your terminal connections for tightness. Loose connections
may cause improper functioning of the controller or damage the components
of the system.
The National Fire Protection Association (NFPA) provides recommendations
for electrical equipment maintenance. Refer to article 70B of the NFPA for
general requirements regarding safety related work practices.
ATTENTION
To ensure personal safety and to guard against damaging
equipment, inspect connections with incoming power off.