4-Channel Fully Isolated DC Voltage Current Power Data Acquisition Module
Product No.: ZH-44044
4 fully isolated channels
75mV, 1V, 5V, 10V, 30V, 60V, 100V, 250V, 400V, 500V, 1000VDC, etc. can be customized
Current range:100uA, 1mA, 20mA, 100mA, 1A, 5A, 10ADC, etc. can be customized (can measure uA level current)
High-accuracy, high-resolution ADC conversion per channel
4-Channel Fully Isolated DIN Rail 100UA DC Power Signal Acquisition Module, Modbus RTU/TCP Transducer
Product Overview
This product is a real-time measurement and acquisition module for comprehensive collection of electrical parameters of 4-channel DC loads. It uses high-speed isolation devices to achieve isolation between signals in each channel. The signal measurement adopts a dedicated 24 bit high-precision true RMS measurement chip to measure effective value parameters such as current, voltage, power, and accumulated electricity. It has high accuracy, good stability, and fast sampling speed; Standard Modbus RTU protocol or Modbus TCP protocol. Widely used in production automation testing, computer room monitoring, product aging detection, etc.
Model Selection
ZH-44044-*4N1:4 channel DC power acquisition module(RS485 communication or Ethernet)
ZH-44041-*4N1:4 channel DC voltage acquisition module(RS485 communication or Ethernet)
ZH-44042-*4N1:4 channel DC current acquisition module(RS485 communication or Ethernet)
ZH-44043-*4N1:4 channel DC current voltage acquisition combo(total 4 channel,RS485 communication or Ethernet)
Product Features
1.Measurement of voltage, current, power, and accumulated power of 4-channel DC loads, which can be used for both AC and DC measurements;
2. Fast speed, 4-channel independent AD synchronous sampling, can complete data acquisition of all 4 electrical parameters in as little as 20ms;
3. High precision, using 24 bit AD sampling, dynamic range of 1000:1, and linear current range of up to 0.1%;
4.20mS、40mS、60mS、80mS、100mS、400mS、1000mS Seven adjustable collection speeds, which means completing the measurement of all electrical parameters within the set time;
5. It has both unipolar and bipolar measurement functions and can be selected for use;
6. High reliability, 4 channels are isolated from each other, power supply, communication and tested end are fully isolated, and the withstand voltage is greater than 2500V;
7. There are two options for setting the address and baud rate with a hardware dip switch, as well as software settings;
8. Optional network port communication, Modbus RTU protocol and Modbus TCP protocol are optional;
Technical Specification
20mS, 40mS, 60mS, 80mS, 100mS (default), 400MS, 1000MS can be set
Note: When the input is an AC signal with a frequency other than 50Hz, the sampling speed needs to be adjusted to 400mS.
no parity/odd parity/even parity, 8 data bits, 1 stop bit
Or special method: no verification, 8 data bits, 2 stop bits (the 9th bit can be set to 1 or 0)
Note: This product defaults to software modification at the factory, with parameters including Address 1, baud rate 9600, no checksum, 8 data bits, and 1 stop bit
Accuracy level
0.2%
Current range
100uA, 1mA, 20mA, 100mA, 1A, 5A, 10ADC, etc. can be customized (can measure uA level current)
Voltage range
75mV, 1V, 5V, 10V, 30V, 60V, 100V, 250V, 400V, 500V, 1000VDC, etc. can be customized
Input impedance
voltage channel>10 k Ω/V; current channel sampling voltage less than 0.15V
Overload capacity
1.2 times the range is sustainable and measurable; Instantaneous (<50mS) current 5 times, voltage 1.5 times the range without damage
Working temperature
-20 ℃ to+70 ℃
Frequency response
0-1000Hz (for AC/DC universal products)
Data collection update time
Isolation withstand voltage
>2500V DC; Equipped with surge protection
Auxiliary power supply
+9V~30V or+9V~57V
Rated power consumption
<1W (typical 24V power supply 30mA)
Output interface
RS485 (Modbus RTU communication protocol) or Ethernet port (Modbus TCP communication protocol)
Data output
4-channel DC voltage, current, power, cumulative power (AC measurable power factor)
Communication baud rates
4800, 9600, 19200, 38400, 57600, 115200 bps; (Can be set up through software or hardware)
Data format
Installation method
35mm rail installation; Appearance size: 115X90X40 mm
Applications
1.Industrial Automation & Production Testing:
Automated optical inspection lines, DC motor monitoring, and precision electrical manufacturing testing.
2.Burn-in & Aging Test Racks:
Real-time multi-channel power tracking during electronic component and power supply stress testing.
3.Data Centers & Telecom Infrastructure:
Server room DC power distribution cabinets, telecom base station energy management, and battery string monitoring.
4.Renewable Energy:
Solar photovoltaic DC string monitoring and micro-grid load diagnostics.
Why Choose Us
1.True Industrial-Grade Isolation:
Complete galvanic isolation (more than 2500V) across all channels and ports eliminates ground loops and protects expensive downstream PLC/SCADA control systems.
2.High-Speed Simultaneous Sampling:
Independent AD converters per channel capture rapid transients in as fast as 20ms, avoiding the blind spots of multiplexed scanning meters.
3.Flexible Integration & Protocols:
Native support for standard Modbus-RTU (RS485) and Modbus-TCP (Ethernet) ensures seamless plug-and-play integration with third-party software and PLCs.
4.Robust & Reliable Hardware:
Engineered for harsh industrial environments with a wide operating temperature range (-40 to +70) and dual configuration modes (hardware DIP switch & software).
FAQ
Q1: Do these modules feature internal data logging storage?
A1: No. These are real-time acquisition and transmission modules designed to stream parameters instantly to a PLC, SCADA, or upper computer via Modbus. They do not contain internal flash storage for historical data logging.
Q2: Can I mix voltage and current inputs on the same module?
A2: Yes. Model ZH-44043-*4N1 is specifically designed as a combination unit supporting mixed 4 channels of voltage and current inputs.
Q3: How do I configure the device address and baud rate?
A3: You can configure the device easily using either the onboard hardware DIP switches or via software configuration commands over the communication line.
Q4: What communication protocols are supported?
A4: The modules support standard Modbus-RTU over RS485 and Modbus-TCP over Ethernet (network port options available), making them compatible with almost all industrial automation software.
