Control & Monitoring Systems: PCM500

ONE MOUNTING POSITION HIGH

CONTROL & MONITORING SYSTEM

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UNIPOWER Telecom’s PCM500 Series Control and Monitoring System (PCMS) is a one mounting position high (1.75 inches) basic control and monitoring system for DC power plants. It controls up to 16 rectifiers in up to 4 shelves, precisely setting the float voltage and equalize voltage (optional) on all rectifiers simultaneously. It monitors the battery voltage and current by means of front panel test points or optionally by a front panel digital voltmeter and ammeter.

A front panel yellow LED indicates that the controller is  in the optional equalize voltage mode. Front panel red LEDs give the following alarms: rectifier fail alarm-minor, indicating a single rectifier failure; rectifier fail alarm-major, indicating two or more rectifier failures; AC input failure on any rectifier; failure on any fuse or circuit breaker; failure on one or both low voltage disconnects; battery overvoltage; and battery undervoltage. These alarms all have isolated Form C relay contact outputs.

The PCM500 is available in either 48 or 24VDC versions and will operate with a positive or negative polarity plant. It comes with brackets that permit mounting in either a 19- or 23-inch relay rack and can be mounted from the front of the rack with offsets every quarter-inch from front to back to align with exisitng rack-mounted equipment. The front panel has voltage adjustment potentiometers for float voltage, equalize voltage (option), battery overvoltage and undervoltage, and temperature compensation set (option). A front panel switch puts the PCMS in either float or equalize voltage mode. A front panel green/red LED indicates the controller is operating or has failed. The PCM500 mates with UNIPOWER Telecom’s rectifiers and shelves.

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