10 Rockwell Automation Publication 1420-UM001E-EN-P - March 2016
Chapter 1 PowerMonitor 500 Unit Overview
PowerMonitor 500 Features
and Functions
The power monitor connects to your three-phase, split-phase (3-wire North
American single phase), or single-phase (2-wire European) AC power system
directly or through instrument transformers (PTs and CTs). It converts
instantaneous voltage and current values to digital values, and uses the resulting
digital values in calculations of voltage, current, power, energy, and demand.
The power monitor family includes several models that combine the following
basic components:
• A panel-mounted power monitor in one of two AC voltage ranges:
120/208V or 400/600V
• An optional pair of digital (relay) outputs
• An optional pair of 0…20 mA analog outputs
• Optional serial RS-232/RS-485 communication supporting Modbus
RTU
• Optional Ethernet port supporting EtherNet/IP and Modbus TCP/IP
• Front protection degree: IP65, NEMA 4X, NEMA 12
• Up to four configurable virtual alarms
• Class 1 (kWh) according to EN62053-21
• Class B (kWh) according to EN50470-3
• Class 2 (kVARh) according to EN62053-23
• Accuracy ±0.5% of reading (current/voltage)
• Metering values display: Four rows x 4 digit
• Energy value display: Ten digit plus sign
• Three-phase (system) variables: V(L-L), V(L-N), A, VA, W, VAR, power
factor, frequency
• Single phase variables: V(L-L), V(L-N), A(L), An (calculated), VA, W,
VAR , power factor
• System and single phase average and maximum variables
• Energy measurements (imported/exported): kWh and kVARh
• Revenue grade energy measurements per ANSI C12.1 Class 1.0, ANSI
C12.1
• Run hours counter (8+2 digit)
• Real-time clock function
• Universal power supply: 120/240V AC 50/60 Hz, or 120/240V DC
• Front dimensions: 96 x 96 mm (3.78 x 3.78 in)
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