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1-Channel Voltage Current Transducer WB1926B35

1-Channel Voltage Current Transducer WB1926B35

WB1926B35 uses photoelectric isolation technology and digital acquisition and data processing technology to collect and calculate DC voltage signals in real time, and output data in RS485 bus mode. The product’s DC voltage input signal, 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, saving The A/D overhead of the system, and provides a flexible and convenient software and hardware interface for the system.


Product Detail

Product Tags

Product Description and Application

WB1926B35 uses photoelectric isolation technology and digital acquisition and data processing technology to collect and calculate DC voltage signals in real time, and output data in RS485 bus mode. The product's DC voltage input signal, 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, saving The A/D overhead of the system, and provides a flexible and convenient software and hardware interface for the system.

Product Dimensional Drawing (unit: mm)

Product Terminal Identification Drawing

Key Technical Data

Attribute

Value

Input specifications

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

Output specification

RS485

Accuracy level

voltage 0.2

Linear measurement range

0%~±120% of nominal input value

Voltage input impedance

when the measured voltage Ux≤1V, Ri≥1MΩ, When the measured voltage Ux>1V, Ri=Ux×10kΩ/V

Voltage overload capacity

2 times the nominal input voltage, lasting 1s, interval 10s, repeat 10 times without breakdown

Anti-interference ability

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

Quiescent current

≤80mA

The data update time

100mS

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,

Communication method

half-duplex, RS485

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

Communication baud rate

≤19.2KBPS (default 9600BPS)

Communication distance

1200m

Number of communication nodes

64 points

Auxiliary power supply

see product label

Temperature drift

≤350×10-6/℃ (-25℃~+70℃)

≤150×10-6/℃ (0℃~+50℃)

Working environment temperature

-25℃~+70℃

Proper use of sensors

1. Sensor installationThis type of sensor has a card-type structure and is easy to install. It is suitable for NS35 / 7.5, NS35 / 15 or European EN50022 standard guide rails.
2. The sensor is calibrated when it leaves the factory, and the user can communicate with the electrician after the wiring is correct.The wiring method should be performed according to the sensor terminal definition diagram. To prevent interference,The RS485 bus connected to A and B should use twisted pair.
3. There is a light-emitting diode on the top of the sensor, and the periodic flashing indicates that the sensor is working normally, otherwise it is not working.
4. Setting method of DIP switch:

① The factory default communication address is 01 and the baud rate is 9600 BPS. You can reset it when you need to use another communication address or baud rate.

② The sensor has an 8-bit DIP switch (K1 ~ K8), where K1 and K2 are used to set the communication baud rate of the sensor. The specific meaning is as follows:

  1. K1

    K2

    Baud rate

    ON

    ON

    2400BPS

    ON

    OFF

    4800BPS

    OFF

    ON

    9600BPS

    OFF

    OFF

    19.2KBPS

    ③ The K3 ~ K8 bits of the DIP switch are used to set the binary communication address (0 ~ 63) of the sensor. The switch is set to ON for 0 and OFF for 1:

    K3

    K4

    K5

    K6

    K7

    K8

    Address

    ON

    ON

    ON

    ON

    ON

    ON

    0

    ON

    ON

    ON

    ON

    ON

    OFF

    1

    ON

    OFF

    OFF

    OFF

    OFF

    OFF

    31

    OFF

    OFF

    OFF

    OFF

    OFF

    OFF

    63

    5. The output of this product meets the RS-485 standard requirements. If multiple devices are connected to the bus, please connect 120Ω matching resistors between the A and B terminals of the sensors at the beginning and end of the bus.

    6. When using this product, in addition to completing the hardware connection as required, the user's host computer must be programmed according to the "Communication Protocol" in order to communicate with the sensor normally.

    7. 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:

    No

    Register address

    Content

    Meaning

    Bytes

    1

    0

    U

    IN1DC Voltage

    2

    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.

    8. Data calculation method

    In the following table, Rx is the parameter value returned by the register, Umax represents the rated value of IN1, and the rated value is shown on the product label;

    Parameter name

    Calculation method

    Data format

    Parameter content

    Voltage

    Rx×Umax1×Ix  ×0.0001

    Signed integer

    U

    9. Pay attention to the positive direction of the input signal. When wiring according to the requirements of the terminal definition icon, the output data is in the same direction as the positive end of the input signal, otherwise the two are reversed.


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