The BiTRONICS M871 Monitoring & Recording IED offers high-speed, high-accuracy power measurements for the electric utility substation. The M871 calculates True RMS Voltage, Current, and Watts every quarter cycle. Harmonics to the 63rd, K-Factor, Power, Frequency, sequence components, and many other measurements are updated every cycle. This calculation speed, coupled with a Modicon PLC on a Modbus or high-speed Modbus Plus LAN, enables control applications formerly unthinkable with measurement instruments. An optional 10/100 Mbps Ethernet port communicates with UCA2.0-Compliant protocols (OSI and TCP/IP simultaneously). The M871 is also a powerful recorder featuring waveform capture, accurate up to 100A ac symmetrical, with 128 samples per cycle resolution, two disturbance recording modes at rates of 1-3600 samples per cycle, sequence of event and trend recording. The combination of reliability and performance has made BiTRONICS brand meters the instrument of choice in substation applications.
Modbus, Modbus TCP
Modbus RTU, Modbus TCP, Modbus Plus; Sub-cycle measurements; 5 simultaneous recording modes; simultaneous support of multiple protocols and physical links; up to 256Mb on-board non-volatile storage.
-40 to +70 C operating range, 6AC Voltage, 4AC current and 2DC input channels, 16 or 8 digital inputs, 4 of which can be relay outputs