8-Channel Fully Isolated DC Power and Energy Monitoring Module 0-20mA 0-75mV

8-Channel Fully Isolated DC Data Acquisition Module Modbus RTU/TCP Transducer

Product Overview
The JSH-44084 is an eight-circuit DC power and energy monitoring module for industrial load measurement. Each circuit provides voltage and current measurements, together with power and separate forward/reverse energy data.
Eight independent ADCs sample the circuits synchronously. At the fastest listed setting, measurements for all eight circuits update within 20 ms. Selectable update intervals allow the module to suit different monitoring and communication requirements.
The eight measurement circuits are isolated from one another, with isolation between the measured inputs, auxiliary power, and communication interface. Within each circuit, voltage and current share a common negative terminal, and current is measured in the load’s negative return path.
The module communicates through RS485 using Modbus RTU and mounts on a standard 35 mm DIN rail. Voltage and current ranges are specified when ordering.

Model Selection

Key Features

1.Measurement of voltage, current, power, and accumulated power of 8-channel DC loads, capable of universal measurement for both AC and DC;

2. Fast speed, 8-channel independent AD synchronous sampling, can complete data acquisition of all 8 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%;
4.10mS,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, 8 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. Plug and unplug terminals, easy to use, exquisite appearance, flame-retardant ABS;
Technical Specification

Application
1.Multi-Circuit DC Distribution Monitoring
Monitor eight DC feeders supplying separate loads. Per-circuit voltage, current, power, and energy readings allow a supervisory system to compare loading, track consumption, and locate circuits with unusual operating trends.

2.DC Load Banks and Production Burn-In Tests
Collect electrical measurements from eight DC test circuits during load testing or equipment burn-in. Synchronous sampling provides measurements from the same acquisition period, helping operators compare circuit loading and observe changes as test conditions vary.

3.Data Center DC Power Monitoring
Measure selected DC equipment feeders or auxiliary DC circuits in a data center. Per-circuit power and energy data support load allocation and consumption analysis. Select ranges and wiring to match the actual DC distribution system.

4.Battery Charge and Discharge Test Systems
Monitor voltage, current, power, and transferred energy across eight suitable test circuits. Separate forward/reverse energy registers support charge and discharge energy tracking. Confirm polarity settings, current direction, and circuit isolation requirements during integration.

5.DC Lighting Circuit Monitoring
Track the operating current, power, and energy consumption of individual DC lighting branches. A host system can compare readings against expected load levels and identify changes that may require inspection.

6.Industrial Equipment Energy Analysis
Integrate eight-circuit DC measurements into a PLC or supervisory platform to compare equipment consumption across operating periods. Accumulated energy readings support analysis by load, machine, or production stage.

Why You Choose Us
1.Reliable Industrial Standards:
Offering dependable industrial signal acquisition and automation hardware.

2.Wide Operating Range:
Built for rugged industrial environments with an operating temperature range from -40 to+70.

3.Flexible Configuration:
Supports hardware DIP switches for setting addresses and baud rates alongside software configuration options, plus standard Modbus-RTU or TCP protocols.
FAQ
Q1: Does this module store historical data internally?
A: No, this product functions strictly as a real-time signal acquisition and monitoring module without internal historical storage or data logging capabilities.

Q2: How fast is the data acquisition?
A: It features 8 independent AD simultaneous sampling channels that can complete data acquisition for all 8 channels in as fast as 10ms.

Q3: What communication interfaces and protocols are supported?
A: It offers RS485 or Ethernet interfaces supporting standard configurable Modbus-RTU or Modbus-TCP communication protocols.

Q4:Can it measure all eight circuits simultaneously?
Yes. The manual specifies eight independent ADCs with synchronous sampling. The fastest listed update interval is 20 ms for all eight circuits.

Q5:Does 0.2% FS mean 0.2% of the measured value?
No. FS means full scale. For example, 0.2% of a 5A full-scale range is 0.01A.

Q6:Can the measurement range be changed through software?
The input ranges must be specified when ordering. The voltage and current range registers are documented as reference fields that do not participate in measurement calculation.

Q7:Can accumulated energy be reset?
Yes. Modbus commands can clear all energy values, all forward energy values, or all reverse energy values.

Q8:Does it measure individual battery cells?
It is designed for load-circuit electrical measurement. Suitability for individual cells in a series-connected battery stack requires separate confirmation of input ranges, working-voltage limits, and wiring.