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VVM311 - 400V 200A DC Isolated Voltage and Current Sensor Module with Serial UART Communication MODBUS Compatible

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VVM311 400V 200A isolated DC voltage and current sensor module
  • VVM311 400V 200A isolated DC voltage and current sensor module

Product Description

The VVM311 provides isolated DC voltage measurement from 0 to 400 V and Hall effect DC current measurement up to 200 A using a WCS1500 sensor. The non-invasive current sensor requires no shunt resistor or wire break, making the module suitable for industrial monitoring and data acquisition.

It operates from a 9–24 V DC supply and provides measured voltage and current over a TTL UART interface at three readings per second. The datasheet specifies 1.5 kV DC isolation between the measured voltage and communication lines. Modbus RTU slave operation requires an external TTL-to-RS485 converter.

The 80 × 36 mm board supports programmable 9600/19200 baud rates, slave addresses 1–247, voltage and current calibration, and zero-current offset correction.

Applications

Motor Control Solar & Power Systems Battery Charging & Electric Vehicles

Product Specifications

Model / versionVVM311 / v1.2
Voltage range0–400 V DC
Current rangeUp to 200 A DC
Current sensorWCS1500 Hall effect
Isolation1.5 kV DC between measured voltage and communication lines
Operating supply9–24 V DC
PCB dimensions80 × 36 mm
InterfaceTTL UART; external converters for RS232/RS485 integration
Data rate3 readings per second
Baud rates9600 default / 19200
Serial formatV350.89DC32.64D followed by newline (example)
ModbusRTU slave via external TTL-to-RS485 converter
Slave ID1–247; default 1
Registers40001–40002 voltage; 40003–40004 current; 40005–40006 power; 32-bit floats
Baud commandsBAU1 / BAU2
Mode commandsMOD / SERIALON
Address commandSLVXXX, e.g. SLV005
Voltage calibrationCALXXX.XX, e.g. CAL054.60
Current calibrationCLIXXX.XX, e.g. CLI025.00
Zero correctionZER with no current flowing

Product Features

  1. 0–400 V DC voltage measurement
  2. Up to 200 A DC current measurement using WCS1500 Hall sensor
  3. Non-invasive current sensing; no shunt resistor or wire break
  4. 1.5 kV DC isolation between measured voltage and communication lines
  5. 9–24 V DC operating supply
  6. TTL UART output at three readings per second
  7. 9600 default baud; selectable 19200
  8. Modbus RTU slave through external TTL-to-RS485 converter
  9. Programmable slave ID 1–247; default 1
  10. Voltage, current and zero-current calibration commands
  11. 80 × 36 mm PCB

Package Includes

  • 1 × VVM311 isolated voltage and current sensor module
  • Auxiliary power supply and TTL-to-USB/RS485 converters are not specified as included.

Frequently Asked Questions

What ranges does VVM311 measure?
DC voltage from 0 to 400 V and DC current up to 200 A. Current sensing uses a WCS1500 Hall effect sensor without a shunt resistor or wire break.
What supply and isolation are specified?
The module requires 9–24 V DC power. The datasheet specifies 1.5 kV DC isolation between the measured voltage and communication lines. PCB size is 80 × 36 mm.
What UART data and baud rates are available?
The module transmits three readings per second. Example V350.89DC32.64D followed by newline represents 350.89 V DC and 32.64 A DC. BAU1 selects 9600 baud and BAU2 selects 19200. Follow the manufacturer's Rx/Tx pin labels and wiring table.
How is Modbus RTU used?
Use an external TTL-to-RS485 converter. MOD selects Modbus slave mode; SERIALON restores serial mode. SLV001–SLV247 selects the slave ID, with default 1. Register pairs 40001–40002, 40003–40004 and 40005–40006 hold voltage, current and power respectively as 32-bit floats.
How is calibration performed?
CALXXX.XX calibrates voltage, such as CAL054.60. CLIXXX.XX calibrates current, such as CLI025.00. ZER corrects zero-current offset when no current flows. Calibration factors are stored by the module.

Other Information

Applications: test and measurement, instrumentation and control, motor control, industrial automation, solar systems, battery chargers and electric vehicles.

Observe VIN polarity and the current-direction diagram. Follow the manufacturer pin labels: Rx carries measurement output and Tx accepts configuration commands. The datasheet's USB-to-TTL connection table uses Tx-to-Tx and Rx-to-Rx as labelled; its RS485-to-TTL table uses crossed Tx/Rx. Modbus replaces regular serial streaming. Use the appropriate external converter for RS232/RS485. Current sensitivity, accuracy tolerances, environmental ratings, wireless connectivity, Wh/Ah accumulation and over-current output are not specified in this PDF.

Warranty Information

1 Year Seller Warranty

This item is covered with a standard warranty of 1 year from the time of delivery against manufacturing defects only. This warranty is given for the benefit of TwoElectrons customers from any kind of manufacturing defects. Replacement will be done against manufacturing defects.

What Voids Warranty

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

Shipping & Returns Policy

Shipping Policy:
  • In-stock items are delivered within 7-10 working days for orders within India. Delivery varies based on location and courier service.
  • In-stock items are delivered within up to 20 working days for orders outside India. Delivery varies based on location and courier service.
  • If the item is out of stock, you can still place an order. The estimated delivery time will be notified to you by email.
Return & Refund Policy:
  • Return window: 7 days from receipt unless stated otherwise.
  • No refunds or replacements after the return window.
  • Returns are accepted only for non-working or damaged products.
  • Initiate return requests from here: Return Request or contact us at 09831070550.
  • Refunds are processed within 3-4 working days after inspection and approval.
VVM311 - 400V 200A DC Isolated Voltage and Current Sensor Module with Serial UART Communication MODBUS Compatible

Main Features

  • 0–400 V DC voltage measurement
  • Up to 200 A DC current measurement using WCS1500 Hall sensor
  • Non-invasive current sensing; no shunt resistor or wire break
  • 1.5 kV DC isolation between measured voltage and communication lines
  • 9–24 V DC operating supply
  • TTL UART output at three readings per second
  • 9600 default baud; selectable 19200
  • Modbus RTU slave through external TTL-to-RS485 converter
  • Programmable slave ID 1–247; default 1
  • Voltage, current and zero-current calibration commands
  • 80 × 36 mm PCB
SKU: 2EMK30015
₹ 1,964.00
For bulk orders, volume pricing & B2B enquiries, contact our team →

Lead time

QUANTITY DISPATCH
1-10 units Order from India: 7-10 working days
Order outside India: Up to 20 working days
10+ units To be negotiated
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