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VVM111 - 400V DC Isolated Voltage Sensor Module with Serial UART Communication MODBUS Compatible

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VVM111 400V DC isolated voltage sensor module with UART TTL interface
  • VVM111 400V DC isolated voltage sensor module with UART TTL interface

Product Description

The VVM111 provides isolated DC voltage measurement from 0 to 400 V for industrial and commercial monitoring systems. It offers 1.5 kV DC galvanic isolation between the measured voltage and communication lines, and operates from a separate 9–24 V DC supply.

Measured voltage is available digitally through a TTL UART serial interface at three readings per second. The default baud rate is 9600, with a programmable 19200 option. Modbus RTU slave operation is supported using an external TTL-to-RS485 converter, with programmable slave addresses from 1 to 247.

Applications

Motor Control Solar & Power Systems Battery Charging & Electric Vehicles

Product Specifications

ModelVVM111
Datasheet versionv1.2
Measurement0–400 V DC
Galvanic isolation1.5 kV DC between measured voltage and communication lines
Operating supply9–24 V DC
InterfaceTTL UART
Baud rates9600 default; 19200 selectable
Data update rate3 readings per second
Serial formatV350.89D followed by newline (example: 350.89 V DC)
Modbus operationRTU slave through external TTL-to-RS485 converter
Slave ID1–247; default 1
Voltage registers40001–40002; 32-bit float
Modbus example settingsFunction 03; two registers; high byte first; high word first
Baud commandBAU1: 9600; BAU2: 19200
Mode commandsMOD: Modbus slave; SERIALON: serial mode
Slave ID commandSLVXXX, e.g. SLV005
Calibration commandCALXXX.XX, e.g. CAL054.60
Board dimensions80 × 36 mm

Product Features

  1. 0–400 V DC isolated voltage measurement
  2. 1.5 kV DC isolation between measured voltage and communication lines
  3. 9–24 V DC operating supply
  4. TTL UART serial output; 3 readings per second
  5. Selectable 9600 or 19200 baud; 9600 default
  6. Modbus RTU slave with external TTL-to-RS485 converter
  7. Programmable slave ID 1–247; default 1
  8. Serial calibration with stored calibration factor
  9. Compact 80 × 36 mm PCB
  10. Follow the manufacturer's serial commands to configure baud rate, slave ID, operating mode and calibration.

Package Includes

  • 1 × VVM111 isolated DC voltage sensor module
  • Power supply and TTL/USB/RS485 interface converters are not specified as included.

Frequently Asked Questions

What voltage range does VVM111 measure?
It measures 0–400 V DC with 1.5 kV DC galvanic isolation between the measured voltage and communication lines. The module requires a separate 9–24 V DC supply.
How do I read voltage through UART?
The TTL UART interface defaults to 9600 baud and transmits three readings per second. Example: V350.89D followed by a newline represents 350.89 V DC. Follow the manufacturer pin labels and connection table.
Does it connect directly to an RS485 network?
An external TTL-to-RS485 converter is required. Send MOD over the serial interface to select Modbus RTU slave mode. The default slave ID is 1; SLV001 through SLV247 select the address.
Which Modbus registers contain voltage?
Registers 40001 and 40002 hold the voltage as a 32-bit floating-point value. The datasheet example uses function 03, two registers, high byte first and high word first.
Can baud rate, operating mode and calibration be changed?
Yes. BAU1 selects 9600 baud and BAU2 selects 19200; follow the reset prompt. SERIALON returns to regular serial mode. CAL followed by the actual voltage, such as CAL054.60, stores a calibration factor.

Other Information

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

Connect a separate 9–24 V DC operating supply and apply the measured DC voltage to the Vin screw terminal with correct polarity. The datasheet uses module pin labels Rx for outgoing measurement data and Tx for incoming configuration; follow its connection table rather than assuming conventional naming. USB-to-TTL uses Tx-to-Tx and Rx-to-Rx as labelled; RS485-to-TTL uses crossed Tx/Rx. Use an external level/interface converter for RS232 or RS485 integration. The module does not include a wireless interface. Modbus mode replaces regular serial streaming. Measurement accuracy, IP rating and environmental limits are not specified in the supplied 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.
VVM111 - 400V DC Isolated Voltage Sensor Module with Serial UART Communication MODBUS Compatible

Main Features

  • 0–400 V DC isolated voltage measurement
  • 1.5 kV DC isolation between measured voltage and communication lines
  • 9–24 V DC operating supply
  • TTL UART serial output; 3 readings per second
  • Selectable 9600 or 19200 baud; 9600 default
  • Modbus RTU slave with external TTL-to-RS485 converter
  • Programmable slave ID 1–247; default 1
  • Serial calibration with stored calibration factor
  • Compact 80 × 36 mm PCB
SKU: 2EMK30006
₹ 1,590.00
Minimum order quantity: 2. For larger quantities, bulk orders, volume pricing & B2B enquiries, please, please Request for quote →

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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