FC-PSU-UNI2450U V2.1  Safety Manager System Power Supply

Your Safety System is protecting your process equipment and proper power supply maintenance ensures the system remains
available. Each part of the system should be inspected and alarms acted upon immediately. The Safety Manager Systems
Troubleshooting and Maintenance Guide section 5 and the Fail Safe Controller FSC Service Manual section 7 provide further
guidance and service checklists for actions to take to maintain the system properly providing longest life and best system
performance.
Power System Alarms
The SMS Power Supply includes diagnostics and alarms which should be confirmed to be properly working, monitored and acted upon. These are the indicators that the power supply is in need of
attention before failure occurs. There are LED indicators for:
• Internal high air temperature > 90 Deg C
• Fan speed too slow
• Output voltage outside of the range below:

FC-PSU-UNI2450U-V1.0

The overall useful life of any electronic equipment can vary based on the environmental conditions they are exposed to
where they are installed. The following are critical to the lifecycle of the PSU and continued health of the system.
Humidity
Humidity levels should be maintained between 40% and 60% with fluctuations of less than 6% rate-of-change per hour. If
humidity is substantial, conditioned air along with humidity monitoring within the cabinet may be needed. During
maintenance, look for traces of condensation anywhere in the cabinet – this is a signal that the climate control is beginning to
fail.
Corrosion
Look at the paint and exposed metal surfaces within the cabinet for visible signs of corrosion. Corrosive salts and chemicals are
kept out of the cabinet by keeping the door closed. Be aware of metallic debris such as airborne zinc that originates from the
underside of raised floor tiles commonly used in computer rooms or any nearby hardware assembly or construction activities. If
deterioration occurs that you can see, then even further damage is occurring in the components you cannot see and actions
should be taken to further reduce contaminants.