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Two-wire, non-polar, monitoring two routes of the voltage and current of three-phase four-wire power supply of fire equipment in real time, rotary display.
Voltage/Current Signal Sensor
JBF6187-A3 voltage/current signal sensor is a bus addressing type field device for monitoring 2 channels of 3-phase 4-line power supply system.
When any of the monitored voltage signals of 3-phase AC power malfunctions, for example, power interruption, overvoltage, under-voltage, missed phase, wrong phase, or when AC current overloads, the Voltage Signal Sensor will transmit the above fault signals to the monitor and trigger sound/light alarm signals.

Product Features
•  The sensor is encoded with electronic encoder, and the address range is 1 ~ 252.
•  The two-wire connection between the sensor and the monitor is polarity-free; both power supply and signals are transited in this BUS.
•  There are 2 indicators (LEDs) on the sensor - the green LED flashing means normal state, and the yellow light turns steady-on means fault condition.
•  The sensor monitors 3-phase 4-line fire equipment power supply in real time, and can report various faults in 100 seconds, like power supply interruption, overvoltage, under-voltage, missing phase, wrong phase, overload, etc.
•  The sensor can transmit the monitored voltage signal to the PWMS monitor in real time for display.
•  CT ratio function for monitoring current more than 5A (set via monitor menu)
Technical Data

TypeTwo channels
Monitoring objects:Voltage and current value of 3-phase 4-line power supply
Rated working voltage:DC 24V (loop provided)
Rated working current:5mA
Voltage monitoring rangeAC220V
Current monitoring rangeAC0.5A~5A
Voltage resolution:1V
Current resolution0.01A
Percentage of overvoltage0%~20%;
Percentage of under-voltage0%~20%;
Percentage of current overload0%~20%;
Communication modeTwo wires, polarity-free
Communication distance≤1500m
Working environmentTemperature: 0 ℃ ~ + 40 ℃;
Relative humidity: 10% ~ 93% (non-condensation)
Installation35mm standard rail
a. Use encoder to write addresses to sensors.
b. Install the sensor on the 35mm standard guide rail in the fire power distribution box.
c. Connect the polarity-free bus to the L1/L2 terminals of the sensor.
d. Connect the monitored power to U1A, U1B, U1C and U1N terminals of the sensor, and backup power to terminals U2A, U2B, U2C AND U2N terminals of the sensor. The input of phase A of the 3-phase 4-line power should connect I11, I12 and B to I21, I22 and C to I31 and I32.
e. The bus should be soft double stranded wires with a diameter not less than 1.5mm2 (RVS-2 X 1.5mm2).
f.  The wires for connecting the sensor and the output ends of the power supply should be two sets of copper wires of a diameter no less than 1.5mm2 (BV-4x1.5mm2). The cables for AC transmission should be of copper wires of a diameter no less than 1.5mm2 (BV-6X1.5mm2).

•  Do not wire when powered on.
•  Before powered on, check the correctness of the wiring and make sure the order of fire line and zero line.
Normal Sensor Display
 When the sensor line connection is normal and the monitored voltage is normal, the sensor LCD will show the monitored BUS information (BUS A~C) & address of the sensor in rotating display sequence as below:
The address of the sensor in the above figure is 128
Note: when the voltage signal sensor "voltage detecting input end” gets a power outage (or empty load), yellow fault light of the sensor is lit, the yellow fault light will turn on and the LCD back-light will turn on. The monitor will display "power failure" when the rotating display goes to this BUS number.