2 Channel Fully Isolated High Precision DC Voltage & Current Acquisition Module
Product No.: ZH-44023D
DIN Rail Module
Current range:1mA-10A DC(Can be customized)
Voltage range:75mV-1500V DC(can be customized)
Measurement Type:DC Voltage/DC Current
2 Channel Fully Isolated High Precision DC Voltage & Current Acquisition Module
Overview
The ZH-4402 Series is a professional industrial-grade DC acquisition module capable of accurately measuring two independent DC voltage or current signals simultaneously.
Built around dual independent 24-bit ADC converters and a 32-bit ARM processor, the module delivers exceptional accuracy, high noise immunity, and long-term stability in demanding industrial environments.
Each channel is electrically isolated from the power supply, communication interface, and other input channels, providing more than 4000VDC isolation protection for maximum system safety.
Applications include:
- Energy Storage Systems (ESS)
- Battery Pack Monitoring
- Production Automation
- Product Aging Test Equipment
- Industrial Process Monitoring
- Power Distribution Monitoring
- Renewable Energy Systems
- Laboratory Measurement Systems
1.Independent 24-bit ADC Per Channel
Each channel uses a dedicated industrial-grade 24-bit ADC converter.
Benefits:
- Ultra-high measurement resolution
- Better than 0.01% linearity
- Resolution up to 1/100,000 of full scale
Isolation between:
- Channel-to-channel
- Power supply to input
- Communication interface to input
- Isolation withstand voltage:> 4000V DC
3.Fast Synchronous Sampling
Dual channels are sampled simultaneously.
Selectable update intervals:
Sampling Speed:20ms/40ms/60ms/80ms/100ms/200ms/300ms/400ms
The fastest acquisition cycle completes within 20 milliseconds.
4.Modbus Communication Support
Available communication options
RS485 Version
- Modbus RTU Protocol
- Multi-drop Networking
- Long Distance Transmission
- Modbus TCP Protocol
- Industrial Ethernet Integration
- SCADA Compatibility
5.Bipolar Measurement Capability
Supports:
- Positive Voltage Measurement
- Negative Voltage Measurement
- Positive Current Measurement
- Negative Current Measurement
- Average Value
- Bipolar Average Value
- Maximum Value
- Raw ADC Data
- Floating Point Data
Available Models
| Model | Description |
|
ZH-44021D-14D3/#V |
2 Channel DC Voltage Acquisition + RS485 |
|
ZH-44022D-14D3/#A |
2 Channel DC Current Acquisition + RS485 |
|
ZH-44023D-14D3/#V*#A |
Voltage + Current Combination + RS485 |
|
ZH-44021D-34D3/#V |
2 Channel Voltage Acquisition + Ethernet + RS485 |
|
ZH-44022D-34D3/#A |
2 Channel Current Acquisition + Ethernet + RS485 |
|
ZH-44023D-34D3/#V*#A |
Voltage + Current Combination + Ethernet + RS485 |
|
Parameter |
Value |
|
Accuracy |
Better than 0.1% |
|
Resolution |
1/100,000 FS |
|
Isolation Voltage |
>4000VDC |
|
Supply Voltage |
9V~55VDC |
|
Operating Temperature |
-40°C~+70°C |
|
Surge Immunity |
>2kV |
|
Power Consumption |
<1W |
|
Mounting |
DIN Rail |
|
Communication |
RS485/Ethernet |
| Current range | 1mA/20mA/100mA/1A/2A/5A/10A DC,can be customized |
| Voltage range | 75mV/10V/30V/60V/300V/500V/1000/V1500V DC,can be customized |
FAQ
1.What is a DC acquisition module?
A DC acquisition module is used to measure and digitize DC voltage or current signals and transmit the data to PLCs, SCADA systems, HMIs, or industrial computers via communication protocols such as Modbus RTU and Modbus TCP.
2.Does the module support both voltage and current measurement?
Yes. Depending on the model selected, the module can measure DC voltage, DC current, or a combination of voltage and current signals.
3.Is channel-to-channel isolation provided?
Yes. Each channel is independently isolated, and the module provides over 4000VDC isolation between inputs, power supply, and communication interfaces.
4.Can it be used for battery and energy storage monitoring?
Yes. The module is widely used in:
- Battery Pack Monitoring
- BMS Systems
- ESS Energy Storage Systems
- Solar Energy Monitoring
- DC Power Distribution Monitoring
Supported protocols include:Modbus RTU (RS485) and Modbus TCP (Ethernet),
making integration easy with PLCs, SCADA systems, and industrial control platforms.
Application Cases
1.Battery Formation and Aging Test Systems
Monitor battery charging and discharging voltage/current in real time during production and aging tests.
2.Energy Storage Monitoring
Measure DC bus voltage and current in energy storage systems with high precision and electrical isolation.
3.Industrial Automation Equipment
Acquire process signals from production lines and transfer measurement data to PLC and SCADA systems.
4.Renewable Energy Systems
Used in solar PV, wind power, and hybrid energy systems for DC signal monitoring and performance analysis.
