Kingnen PMU331 Intelligent Bus Comprehensive Detection Device

Parameters

Working voltage: 24VDC ±20%

Maximum working voltage: 36VDC

Power consumption: <2W

Voltage detection: Three-phase AC voltage

Voltage detection overload: 1.2 times

Current detection: Three-phase AC current

Current detection overload: 1.2 times

Switching value detection: 3-way passive input

Temperature detection: 0–8 channel digital temperature sampling

Communication protocols: RS-485 communication, Modbus RTU

Electric energy pulse: LED output

Precision index

AC voltage: 40–400VAC, accuracy ±0.2%FS

AC current: 0–50A / 100A (multiple specifications), accuracy ±0.5%FS

Power accuracy: 1S

Electric energy accuracy: 2S

Temperature accuracy (–10°C to +85°C): ±0.5°C

Temperature accuracy (–55°C to +125°C): ±2.0°C

Electrical characteristics

Measure voltage: 40–400VAC, 1.2 times overload

Measure voltage withstand: No damage under 500V AC / 1 min

Power consumption per voltage line: <0.2VA

Measure current: 0–50A / 100A (multiple specifications)

Power consumption per current line: <0.1VA

Power frequency withstand voltage: 2kV / 1 minute

Insulation resistance: >40MΩ

EMC

Surge immunity – Voltage measurement port: differential mode 6kV, 2Ω (IEC 61000-4-5, Level 3)

Surge immunity – Power port: differential mode 2kV, 2Ω (IEC 61000-4-5, Level 3)

Surge immunity – RS-485 port: differential mode 2kV, 12Ω (IEC 61000-4-5, Level 3)

Electrostatic anti-interference: contact discharge 8kV, air discharge 15kV (IEC 61000-4-2, Level 4)

RE (radiated emission): low frequency (less than 1GHz), CISPR 22 Class B

Fast group pulse – Voltage detection port: IEC 61000-4-4, Level 4

Operating environment

Working temperature: –10°C to +65°C

Storage temperature: –25°C to +70°C

Relative humidity: 5% to 95%RH, no condensation