6 Channel Fully Isolated DC High Voltage Acquisition Module RS485 Modbus TCP

6 Channel Fully Isolated DC High Voltage Acquisition Module RS485 Modbus TCP

Product Overview
The 6-channel fully isolated DC high voltage acquisition module is designed for high-precision multi-channel DC voltage measurement in industrial and energy applications. Each channel adopts an independent 24-bit ADC and independent isolation architecture, ensuring excellent measurement accuracy, electrical safety, and anti-interference performance.
The module supports simultaneous synchronous sampling of 6 voltage channels with fast update rates as low as 20ms. Power supply, communication interface, and input channels are fully isolated from each other, providing isolation withstand voltage greater than 4kV DC.
Communication interfaces include RS485 Modbus-RTU and optional Ethernet Modbus-TCP, making the device suitable for integration into industrial automation systems, energy storage systems, EV charging infrastructure, photovoltaic monitoring, and battery management applications.
Main Features
* 6-channel synchronous high-voltage acquisition
* Independent 24-bit ADC for each channel
* Full isolation between channels, power, and communication
* Isolation withstand voltage >4kV DC
* High-speed update rate down to 20ms
* Floating-point data output
* High precision better than 0.1%
* Resolution up to 1/100000 of full scale
* RS485 Modbus-RTU communication
* Optional Ethernet Modbus-TCP communication
* Configurable baud rate and communication address
* Hardware DIP switch and software configuration supported
* Wide power supply input +9V to +55V DC
* Active upload function supported
* Industrial-grade ARM MCU with strong anti-interference capability
* 7.62mm large-pitch pluggable terminals for easy wiring
* Standard 35mm DIN rail mounting
Product Models
ZH-84061D-14M2/#V:6-channel isolated DC high voltage acquisition module with RS485
ZH-84061D-34M2/#V:6-channel isolated DC high voltage acquisition module with Ethernet + RS485
Example ordering model:ZH-84061D-14M2/2000V,represents a 2000V range module.

Technical Specifications

Parameter	Specification
Accuracy	Better than 0.1%
Linearity Accuracy	Better than 0.01%
Resolution	1/100000 FS
Voltage Ranges	500V / 800V / 1000V / 1500V / 2000V
Overload Capacity	1.2× continuous measurable overload
Input Impedance	>10MΩ

Sampling Speed
Configurable data update intervals:
20ms/40ms/60ms/80ms/100ms (default)/200ms/300ms/400ms
The module can complete synchronous updates for all 6 channels within the configured period.

Parameter	Specification
Channel Isolation	Independent isolation per channel
Power Isolation	Fully isolated
Communication Isolation	Fully isolated
Isolation Voltage	>4kV DC

 Communication Interface

RS485 Communication

Parameter	Specification
Protocol	Modbus-RTU
Baud Rates	4800/9600/19200/38400/57600/115200 bps
Data Format	8 data bits
Parity	None/Odd/Even
Stop Bit	1 or 2 selectable

Default factory serial settings:
Address: 1,Baud Rate: 9600bps,Parity: None,Data Bits: 8,Stop Bit: 1

Ethernet Communication (Optional)

Parameter	Specification
Protocol	Modbus-TCP
Default IP	192.168.2.7
Port	20108
Web Login Account	admin
Web Login Password	admin

Custom IP address modification is supported.

Optional multi-host polling function is available for customized applications.

Electrical Characteristics

Parameter	Specification
Auxiliary Power Supply	+9V ~ +55V DC
RS485 Power Consumption	<2W
Ethernet Power Consumption	<3W
Operating Temperature	-40°C ~ +70°C

 Mechanical Specifications

Parameter	Specification
Mounting Method	35mm DIN Rail
Dimensions	120 × 110.5 × 46 mm
Weight	Approx. 430g

Data Output

The module outputs:

* 6-channel DC voltage absolute values

* Positive and negative polarity values
* Maximum voltage values

Typical Applications

* EV charging stations
* Energy storage systems
* Solar photovoltaic systems
* Battery pack monitoring
* High-voltage DC power systems
* Industrial automation
* New energy vehicles
* High-voltage laboratory testing
* Battery management systems (BMS)
* Industrial IoT monitoring

Advantages for Industrial Applications

Compared with traditional voltage monitoring devices, this module provides:
* Higher isolation safety
* Faster synchronous sampling
* Better anti-interference performance
* High-voltage direct measurement capability
* Higher resolution and precision
* Flexible Modbus integration
* Easier industrial deployment
Customized solutions are available for:
* Voltage range customization
* Communication interface customization
* Ethernet protocol customization
* Active upload function

* OEM/ODM branding service

FAQ – 6 Channel Fully Isolated DC High Voltage Acquisition Module

1. What is this high voltage acquisition module used for?

This module is designed for high-precision DC high voltage measurement and monitoring in industrial and energy applications such as EV charging stations, solar photovoltaic systems, energy storage systems, battery management systems, and industrial automation equipment.

2. How many voltage channels does the module support?

The module supports simultaneous acquisition of 6 independent DC high voltage channels.

3. Are all channels electrically isolated?

Yes. Each voltage channel is independently isolated, and the power supply, communication interface, and input channels are fully isolated from each other.

4. What is the isolation voltage rating?

The isolation withstand voltage is greater than 4kV DC, suitable for high-voltage industrial environments.

5. What communication protocols are supported?

The module supports:
* RS485 with Modbus-RTU protocol

* Ethernet with Modbus-TCP protocol (optional models)

6. What voltage ranges are available?

Standard voltage ranges include:
* 500V* 800V* 1000V* 1500V* 2000V

Custom voltage ranges are also available.

7. What is the measurement accuracy?

The module provides:Accuracy better than 0.1%,Linearity accuracy better than 0.01%.

8. What ADC resolution is used?

Each channel uses an independent 24-bit ADC for high-precision voltage acquisition.

9. What is the measurement resolution?

The measurement resolution reaches 1/100000 of full scale.

For example:1000V range → 10mV resolution

10. How fast is the sampling speed?

The fastest update speed is 20ms for synchronous acquisition of all 6 channels.
Configurable update intervals include:20ms,40ms,60ms,80ms,100ms,200ms,300ms,400ms

11. Does the module support floating-point output?

Yes. The module supports floating-point data output for improved engineering calculation accuracy and software compatibility.

12. What data types can the module output?
The module outputs:
Absolute voltage values,Positive and negative polarity values,Maximum voltage values

13. What power supply is required?

The module supports a wide DC power input range:+9V to +55V DC

14. What is the power consumption?

Typical power consumption:

* RS485 version: <2W

* Ethernet version: <3W

15. What baud rates are supported?
Supported serial baud rates include:
4800bps,9600bps,19200bps,38400bps,57600bps,115200bps

16. What are the default RS485 communication settings?

Factory default serial settings:
Address: 1,Baud Rate: 9600bps,Parity: None,Data Bits: 8,Stop Bit: 1

17. What are the default Ethernet settings?

Factory default Ethernet settings:
* IP Address: 192.168.2.7
* Port: 20108
* Username: admin
* Password: admin

18. Can the IP address be modified?

Yes. The Ethernet IP address can be customized or modified according to system requirements.

19. Does the module support active upload function?

Yes. The module supports optional active upload functionality for automatic data transmission.

20. What mounting method is used?

The module supports standard 35mm DIN rail mounting for industrial control cabinet installation.

21. What operating temperature range is supported?

The operating temperature range is:

-40°C to +70°C

22. What industries commonly use this module?
Typical industries include:
* EV charging systems
* Solar photovoltaic systems
* Energy storage systems
* Battery management systems
* Industrial automation
* High-voltage testing systems

* New energy vehicles

23. Does the module support multi-host Ethernet polling?

Optional customized multi-host polling functionality is available for Ethernet communication systems.

24. Is OEM or ODM customization available?

Yes. We support OEM and ODM services including:
* Voltage range customization
* Communication customization
* Firmware customization
* Private label branding
* Industrial project customization

25. Why is full isolation important in high-voltage systems?
Full isolation improves:
* Operator safety
* System reliability
* Anti-interference capability
* Protection against high-voltage faults
* Stability in industrial environments