1-Channel Voltage 1-Channel Current Transducer Sensor

WB1925B35(1-Channel Voltage 1-Channel Current Transducer Sensor) adopts photoelectric isolation technology and digital acquisition and data processing technology to collect and calculate DC current signals and DC voltage signals in real time, and output data in RS485 bus mode. The product's DC current and DC voltage input signals, output and auxiliary power supply are completely isolated, small in size, light in weight and easy to install; it can be widely used in various automatic control systems to collect different DC current and DC voltage signals on site It saves the A/D volume of the system and provides a flexible and convenient software and hardware interface for the system.

Note: IN1 is connected to DC voltage input, IN2 is connected to DC voltage input, please pay attention to the polarity of the input signal; + E and GND are connected to the working power of the product; 485A and 485B are connected to other undefined terminals of the RS485 output terminal.

Proper use of sensors

1. Real-time data output sequence (using standard Modbus-RTU communication protocol)

When the sensor receives the "read data (03)" command from the user's host computer, it outputs data in the following order:

Note: The sensor can selectively output parameters according to the user's needs. The expression method of the output parameters is specified in the Communication Protocol.

2. Data calculation method

In the following table, Rx is the parameter value returned by the register. Umax1 indicates the rated value of IN1, and Umax2 indicates the rated value of IN2. See the product label for the rated value;

If a current shunt is connected to the front end of the current input, Ix is the output regulation of the shunt.

Grid, default is 1 if there is no shunt.

Applications:

Intelligent low-voltage power distribution system;

DC power screen, box substation;

Temperature and fire monitoring for transformer, fire monitoring for cable;

High-voltage switchgear fiber optic temperature measurement system;

Transformer contact monitoring.

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1. Input specifications:

   DC 75mV, 50V, 100V, 300V, 380V, 400V, 500V, 700V;

   DC 0.5A, 1A, 2A, 3A, 4A, 5A

2. Output specifications: RS485;

3. Accuracy grade: voltage 0.2, power 0.5, 0.2 when current is less than 2A; 0.5 when 2A≤current≤5A;

4. Linear measurement range: 0%～±120% of nominal input value;

5. Voltage input impedance: when the measured voltage Ux≤1V, Ri≥1MΩ,

   When the measured voltage Ux>1V, Ri=Ux×10kΩ/V;

6. Current input impedance: 75mV/IX (IX: measured current);

7. Voltage overload capacity: 2 times the nominal input voltage, lasting 1s, with an interval of 10s, repeating 10       times without breakdown;

8. Current overload capacity: 10 times the nominal input current, continuous 1s, 300s interval, repeated 5 times      without breakdown;

9. Anti-interference ability:

   Comply with EN61326: 2006 SURGE, EFT, ESD immunity test requirements.

10. Quiescent current: ≤80mA;

11. The data update time: 100mS;

12. Isolation withstand voltage: DC 2500V, 1min between input and output,

   DC 2500V, 1min between power supply and input,

   DC 2500V, 1min between power supply and output,

   DC 2500V, 1min between two inputs;

13. Communication method: half duplex, RS485,

14. Communication protocol: MODBUS-RTU

   B05 no parity, 2 stop bits; B15 odd parity, 1 stop bit

   B25 even parity, 1 stop bit; B35 no parity, 1 stop bit

15. Communication baud rate: ≤19.2KBPS (default 9600BPS);

16. Communication distance: 1200m;

17. Number of communication nodes: 64 points;

18. Auxiliary power supply: see product label;

19. Temperature drift: ≤350×10-6/℃ (-25℃～+70℃);

20. Working environment temperature: -25℃～+70℃.