4-Channel High Precision DC Data Acquisition Module ZH-4404D
Product No.: ZH-4404D
4-Channel Synchronized Acquisition
DC Current Range: 10 mA / 20 mA / 100 mA / 1 A / 2 A / 5 A / 10 A, customizable
DC Voltage Range: 75 mV / 10 V / 30 V / 60 V / 100 V / 300 V / 500 V / 1000 V, customizable
24-Bit High-Resolution ADC
The ZH-4404#D is a high-precision 4-channel DC data acquisition module designed for industrial measurement and monitoring applications.
Each channel uses an independent 24-bit industrial-grade ADC, providing high-resolution measurement with a minimum measurable value down to 1/100,000 of the rated range. High-speed isolation components provide electrical isolation between channels, while a 32-bit ARM MCU provides reliable processing and strong anti-interference performance.
The module supports RS485 or Ethernet communication and can use Modbus RTU or Modbus TCP, making it easy to integrate with PLCs, industrial computers, monitoring systems and other control platforms.
It can be configured for DC voltage, DC current, or combined voltage/current measurement according to application requirements.
Key Features
1.4-Channel Synchronized Acquisition
Four channels use independent ADC acquisition and can perform synchronized measurement of electrical signals. The fastest data update time is 20 ms.
2.24-Bit High-Resolution ADC
Independent 24-bit ADCs provide high measurement resolution. The linearity accuracy is better than 0.01%, with measurement resolution down to 1/100,000 of the range.
3.Full Electrical Isolation
The four measurement channels are isolated from each other, while the power supply, communication interface and input signals are also isolated. Isolation withstand voltage is greater than 2500 VDC.
4.Fast and Adjustable Data Update
Eight update intervals are available:20 / 40 / 60 / 80 / 100 / 200 / 300 / 400 ms
The default setting is 100 ms.
5.RS485 or Ethernet Communication
Choose the communication interface according to your system:
RS485 + Modbus RTU
Ethernet + Modbus TCP
The communication baud rate can be configured from 4800 to 115200 bps.
6.Bipolar Measurement
Supports positive and negative polarity measurement and provides raw 24-bit ADC data as well as floating-point data output.
7.Wide Power Supply
Supports a wide auxiliary power supply of:+9 V to +55 VDC
8.Flexible Installation
Supports:35 mm DIN rail mounting or Screw mounting
9.Compact dimensions:115 × 90 × 40 mm
10.Weight: approximately 170g.
Model Selection
Model
Input
Communication
ZH-44041D-14N1/#V
4-Channel DC Voltage
RS485 / Modbus RTU
ZH-44042D-14N1/#A
4-Channel DC Current
RS485 / Modbus RTU
ZH-44043D-14N1/#V#A*
4-Channel DC Voltage/Current Combination
RS485 / Modbus RTU
ZH-44041D-34N1/#V
4-Channel DC Voltage
Ethernet / Modbus TCP
ZH-44042D-34N1/#A
4-Channel DC Current
Ethernet / Modbus TCP
ZH-44043D-34N1/#V#A*
4-Channel DC Voltage/Current Combination
Ethernet / Modbus TCP
Note: For ZH-44043D models, the total number of channels is 4. Voltage and current channels can be configured in different combinations,
such as 2 voltage + 2 current. The #V and #A values represent the customized measurement ranges.
Technical Specifications
Applications
Parameter
Specification
Number of Channels
4
ADC Resolution
24-bit
Accuracy Class
Better than Class 0.1
Voltage Accuracy
0.05%
Current Accuracy
0.05% (<1 A range); 0.1% (1–10 A range)
Linearity Accuracy
0.01%
Minimum Measurement
Up to 1/100,000 of rated range
DC Current Range
10 mA / 20 mA / 100 mA / 1 A / 2 A / 5 A / 10 A, customizable
DC Voltage Range
75 mV / 10 V / 30 V / 60 V / 100 V / 300 V / 500 V / 1000 V, customizable
Data Update Time
20 / 40 / 60 / 80 / 100 / 200 / 300 / 400 ms
Isolation Voltage
>2500 VDC
Auxiliary Power
+9 to +55 VDC
Surge Protection
>2 kV
Communication
RS485 or Ethernet
Protocol
Modbus RTU / Modbus TCP
Baud Rate
4800–115200 bps
Installation
35 mm DIN Rail / Screw Mount
Dimensions
115 × 90 × 40 mm
Weight
Approx. 170 g
Operating Temperature
-40°C to +70°C
Power Consumption
<2 W typical for RS485; <3 W typical for Ethernet
Used for multi-channel DC voltage and current measurement in automated production and control systems.
2.Data Center Monitoring
Suitable for monitoring DC electrical parameters in equipment rooms and data center infrastructure.
3.Product Aging Testing
Can be used for long-term monitoring of voltage and current during product aging and reliability tests.
4.Power Supply Testing
Suitable for monitoring DC output voltage and current of power supplies and electronic equipment.
5.Equipment Condition Monitoring
Provides multi-channel electrical data for industrial equipment monitoring and analysis.
6.Laboratory and Test Systems
The high resolution, configurable measurement ranges and Modbus communication make it suitable for automated test and measurement systems.
Why Choose ZH-4404#D?
1.High Measurement Resolution
24-bit ADC technology and up to 1/100,000 measurement resolution provide detailed DC signal measurement.
2.Independent Channel Isolation
Each measurement channel is independently isolated, reducing interference between channels and improving system reliability.
3.Fast Data Acquisition
Four channels can be synchronously acquired with update intervals as fast as 20 ms.
4.Flexible Configuration
Voltage, current and combined voltage/current versions are available, with measurement ranges customizable according to application requirements.
5.Easy System Integration
RS485/Modbus RTU and Ethernet/Modbus TCP interfaces allow straightforward connection to industrial control and monitoring systems.
6.Reliable Industrial Design
Wide operating temperature, wide auxiliary power input and >2500 VDC isolation make the module suitable for demanding industrial environments.
FAQ
1. How many channels does the ZH-4404#D support?
The module provides 4 independent DC measurement channels. Voltage, current, or voltage/current combination configurations are available.
2. Does the module support both RS485 and Ethernet?
Yes. Different model versions are available with RS485/Modbus RTU or Ethernet/Modbus TCP communication.
3. What DC voltage and current ranges are available?
Voltage ranges include 75 mV, 10 V, 30 V, 60 V, 100 V, 300 V, 500 V and 1000 VDC. Current ranges include 10 mA, 20 mA, 100 mA, 1 A, 2 A, 5 A and 10 A, with customized ranges available.
4. Are the four channels electrically isolated?
Yes. The four input channels are isolated from each other, and the power supply, communication interface and measurement inputs are also isolated. The isolation withstand voltage is greater than 2500 VDC.
5. How fast can the module update measurement data?
The data update interval can be set from 20 ms to 400 ms. The fastest setting is 20 ms.
6. Can the measurement range be customized?
Yes. The voltage and current ranges can be customized according to the application requirements. The selected range is incorporated into the product model.
