CM-250

About the CM-250

CM-250 is a PowerLogic Circuit Monitor (CM) manufactured by Square D/Schneider Electric. The CM-250 is a data acquisition and control instrument able to replace several conventional metering and data attainment modules. The CM-250 is designed with industry-standard RS-485/RS-422 communication to allow for easy integration into new or existing communication networks.

The CM-250 circuit monitor has the following features standard:

• On-board calendar and clock

• Sy/Max Compatibility

• True RMS sensing

• UL Listed (UL 508)

• Microprocessor-based control

• User Configurable

• Accepts standard CT and PT inputs (5A and 120V)

• Quick setup and operation from the faceplate

• 6-digit LED display of 24 values

• Non-volatile memory

• Waveform capture

• Energy management alarms

The CM-250 can report on 20 instantaneous values including voltage, current, power factor, real power, reactive power, frequency, apparent power, and temperature. A running minimum and maximum of each instantaneous value are stored in non-volatile memory.

The CM-250 enclosure is designed from three separate 16-gauge pieces of steel: a rear cover, a front cover, and an optional trim ring. The unit is self-cooled by convection. The CM-250 is usually mounted semi-flush through a panel or breaker cell door, but in situations where space is limited or multiple modules are being used, the unit can be mounted using a different method. The CM-250 is usually grounded by the connection of its hardware to a nearby grounded metal enclosure. If the user feels this is not sufficient, a separate equipment ground wire may be connected to one of the CM-250's mounting studs. 120 VAC 0.5 Amp 50/60 Hz.