12 Channel DC Voltage Current Acquisition Module Fully Isolated RS485 Modbus

12 Channel DC Voltage Current Acquisition Module Fully Isolated RS485 Modbus

Product Overview

The ZH series 12-channel DC acquisition module is a professional industrial data acquisition device developed for high-precision voltage and current monitoring applications.

Each channel adopts an independent industrial-grade 24-bit ADC chip to achieve ultra-high measurement resolution up to one hundred thousandth of the full scale range. High-speed digital isolation technology ensures complete isolation between channels, communication interfaces, power supply, and input signals.

The module is powered by a 32-bit ARM MCU core, providing exceptional anti-interference capability, high stability, and reliable industrial operation. It supports RS485 Modbus-RTU or Ethernet Modbus-TCP communication protocols, enabling easy integration with PLC systems, SCADA platforms, industrial PCs, and energy management systems.

The product is widely used in industrial automation, battery aging test systems, energy storage monitoring, laboratory testing equipment, process control systems, and industrial IoT applications.

Product Model

ZH-44121D-14M2/#V 12-channel DC voltage acquisition, RS485,high precision

ZH-44122D-14M2/#A 12-channel DC current acquisition, RS485, high precision

ZH-44123D-14M2/#V*#A Voltage/current combination, RS485

ZH-44121D-34M2/#V Voltage acquisition, Ethernet + RS485

ZH-44122D-34M2/#A Current acquisition, Ethernet + RS485

ZH-44123D-34M2/#V*#A Voltage/current combination, Ethernet + RS485

Key Features

1.12-channel independent synchronous acquisition

2.Independent 24-bit industrial ADC per channel

3.Resolution up to 1/100000 of full scale

4.Adjustable sampling speed from 20ms to 400ms

5.Bipolar positive and negative signal measurement

6.Floating-point data output

7.Full isolation between channels and communication interfaces

8.Isolation voltage greater than 3000VDC

9.Wide power supply input range (+9V~+55VDC)

10.RS485 Modbus-RTU communication

11.Optional Ethernet Modbus-TCP communication

12.Hardware DIP switch and software configuration

13.Active data upload function

14.Industrial-grade surge protection

15.DIN rail and screw mounting installation

Typical Applications

1.Industrial Automation Systems

2.Used for analog voltage and current signal acquisition in industrial production lines and automation control systems.

3.Energy Storage Systems

4.Suitable for battery energy storage monitoring, DC power systems, and energy management platforms.

5.Battery Aging Test Equipment

6.Supports high-speed synchronized acquisition for battery aging and charge-discharge testing systems.

7.PLC & SCADA Monitoring

8.Integrated with PLC controllers, SCADA systems, industrial IPCs, and IoT gateways.

9.Laboratory & Test Equipment

10.Ideal for precision measurement, industrial instrumentation, and laboratory data acquisition applications.

Technical Specifications

Item	Specifications
Channel	12 Channels
ADC Resolution	24 Bit
Accuracy	Better than 0.1% / 0.2%
Linear Accuracy	0.01% / 0.05%
Voltage Range	75mV~500VDC,can be customized
Current Range	10mA~10ADC,can be customized
Isolation Voltage	>3000VDC
Working Temperature	-40℃ ~ +70℃
Data Update Speed	20ms~400ms
Power Supply	+9V~+55VDC
Communication	RS485 / Ethernet
Protocol	Modbus-RTU / Modbus-TCP
Surge Protection	>2kV
Installation	DIN Rail / Screw Mount
Dimensions	120×110.6×45.5mm
Weight	Approx. 330g

Frequently Asked Questions

Q1: Does the module support both Modbus-RTU and Modbus-TCP protocols?

Yes. RS485 models support Modbus-RTU, while Ethernet models support both Modbus-TCP and RS485 communication.

Q2: Is each analog input channel isolated?

Yes. Every acquisition channel is independently isolated, including signal, communication, and power isolation.

Q3: What is the fastest acquisition speed of the module?

The module supports ultra-fast synchronized acquisition with a minimum update interval of 20ms.

Q4: Can the module measure both positive and negative DC signals?

Yes. The module supports bipolar voltage and current measurement with floating-point output.