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VVM312 - 400V 100A DC Isolated Voltage and Current Sensor Module with Serial UART Communication MODBUS Compatible

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VVM312 400V 100A isolated DC voltage and Hall effect current sensor module
  • VVM312 400V 100A isolated DC voltage and Hall effect current sensor module

Product Description

The VVM312 provides isolated DC voltage measurement from 0 to 400 V and Hall effect current measurement up to 100 A for industrial and commercial monitoring. Its WCS1600 sensor measures current without a shunt resistor or breaking the measured conductor.

The module provides 1.5 kV DC isolation between the measured voltage and communication lines. A TTL UART interface supplies voltage and current readings, with programmable baud rate and serial calibration commands. Modbus RTU slave operation is supported through an external TTL-to-RS485 converter. The compact 80 × 36 mm board operates from a 9–24 V DC auxiliary supply.

Applications

Motor Control Solar & Power Systems Battery Charging & Electric Vehicles

Product Specifications

ModelVVM312
Versionv1.2
DC voltage range0–400 V
DC current rangeUp to 100 A
Current sensorWCS1600 Hall effect
Isolation1.5 kV DC between measured voltage and communication lines
Auxiliary power9–24 V DC
PCB dimensions80 × 36 mm
InterfaceTTL UART; external converter required for RS232/RS485 integration
Baud rate9600 default; 19200 selectable
Serial update rate3 values per second
Serial formatV350.89DC32.64D followed by newline; V = voltage, C = current, D = DC delimiter
Module pin labels9–24v, supply negative, Rx, Tx, NC; VIN screw terminals
Module Rx pinMeasurement data output, per manufacturer pin labeling
Module Tx pinConfiguration command input, per manufacturer pin labeling
Slave ID1 default; 001–247 allowed
Modbus registers40001–40002 voltage; 40003–40004 current; 40005–40006 power; 32-bit float
Baud commandsBAU1 = 9600; BAU2 = 19200; reset as prompted
Mode commandsMOD enters Modbus; SERION returns to serial
Voltage calibrationCALXXX.XX; e.g. CAL054.60
Current calibrationCLIXXX.XX; e.g. CLI025.00
Zero-current calibrationZER

Product Features

  1. 0–400 V DC isolated voltage measurement
  2. DC current measurement up to 100 A using WCS1600 Hall effect sensing
  3. Non-invasive current sensing without a shunt resistor
  4. 1.5 kV DC isolation between measured voltage and communication lines
  5. 9–24 V DC auxiliary power supply
  6. TTL UART output; programmable 9600 or 19200 baud
  7. Modbus RTU slave via external TTL-to-RS485 converter
  8. Programmable slave ID 1–247; default 1
  9. 80 × 36 mm compact PCB
  10. Voltage and current calibration through serial commands
  11. Stored calibration factors and serial zero-current correction

Package Includes

  • 1 × VVM312 isolated DC voltage and current sensor module
  • Auxiliary supply and TTL-to-USB/RS485 converters are not specified as included.

Frequently Asked Questions

What voltage and current can the VVM312 measure?
The VVM312 measures 0–400 V DC and DC current up to 100 A using a WCS1600 Hall effect sensor. Current measurement does not require a shunt resistor or a break in the measured conductor.
What supply and isolation does it provide?
The auxiliary supply is 9–24 V DC. The datasheet specifies 1.5 kV DC isolation between measured voltage and communication lines. The 400 V measurement input is separate from the auxiliary supply; observe the VIN terminal polarity.
Does the module support Modbus RTU?
Yes, through an external TTL-to-RS485 converter. The default slave ID is 1; IDs 001–247 are supported. Send SLVXXX to set the ID, MOD to enter Modbus mode, and SERION to return to regular serial mode. Regular UART data streaming is unavailable during Modbus operation.
What serial settings and data are available?
The default is 9600 baud; 19200 is also supported. BAU1 selects 9600 and BAU2 selects 19200, followed by the instructed reset. Voltage and current data are transmitted three times per second. Follow the datasheet pin labels and converter-specific wiring table.
How do I calibrate voltage and current readings?
Apply a known voltage and send CALXXX.XX, for example CAL054.60 for 54.6 V. For current calibration, apply a known current and send CLIXXX.XX, for example CLI025.00 for 25 A. Calibration factors are stored automatically. Use higher calibration values for better accuracy. Send ZER with no current flowing to remove the zero-current offset.

Other Information

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

Connect a 9–24 V DC auxiliary supply separately from the measured voltage input. Observe VIN polarity and the current-flow arrow. Follow the manufacturer's converter-specific connection table; the module's Rx/Tx labels reflect its documented pin convention.

Voltage and current readings stream three times per second in serial mode. Modbus mode requires an external TTL-to-RS485 converter. Calibration factors are stored automatically; use higher known voltage/current values for better calibration accuracy. Send ZER with no current flowing to remove offset.

Remote Configuration Support indicates seller support availability. No wireless interface, hazardous-area certification or other product certification is stated in the supplied datasheet.

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.
VVM312 - 400V 100A DC Isolated Voltage and Current Sensor Module with Serial UART Communication MODBUS Compatible

Main Features

  • 0–400 V DC isolated voltage measurement
  • DC current measurement up to 100 A using WCS1600 Hall effect sensing
  • Non-invasive current sensing without a shunt resistor
  • 1.5 kV DC isolation between measured voltage and communication lines
  • 9–24 V DC auxiliary power supply
  • TTL UART output; programmable 9600 or 19200 baud
  • Modbus RTU slave via external TTL-to-RS485 converter
  • Programmable slave ID 1–247; default 1
  • 80 × 36 mm compact PCB
SKU: 2EMK30016
₹ 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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