24-Channel Common Negative 0-10V 0-500V DC Voltage Data Acquisition Module
Product No.: JSH-42241
Accuracy level: 0.5% FS
Working temperature: -20 ℃ to+60 ℃
Data update time: 100ms
Voltage range: 10V/60V/100V/200V/300V/500V DC(can produce 20mA input current type)
24-Channel Common Negative DC Voltage Data Acquisition Module RS485 Ethernet Modbus Monitoring Module
Product Overview
The JSH-42241-14F2 is a 24-channel DC voltage acquisition module supplied by Shenzhen JSH Electronic Co.,Ltd. It measures multiple DC voltage signals and sends readings to a host system through RS485 using the Modbus RTU protocol.
The module uses 24-bit A/D conversion and updates all channel readings every 100 ms. It is designed for applications such as LED burn-in testing, street lighting monitoring and automated production inspection.
All voltage inputs share a common negative terminal internally. Measurement points must therefore be compatible with a shared negative reference.
Model
Input Type
Channels
Communication
JSH-42241-14F2
DC voltage
24
RS485 Modbus RTU
JSH-42121-14F2
DC voltage
12
RS485 Modbus RTU
JSH-42242-14F2
DC current
24
RS485 Modbus RTU
JSH-42122-14F2
DC current
12
RS485 Modbus RTU
Voltage and current models are separate configurations. Confirm the required input type and measurement range before ordering.
Product Features
- 24 DC voltage measurement channels.
- 24-bit A/D conversion.
- 100 ms update interval for all channels.
- Measurement accuracy of 0.5% of full scale.
- RS485 interface with Modbus RTU communication.
- Common-negative voltage inputs for compatible test circuits.
- Screw mounting or DIN rail mounting.
Technical Specification
Product Size
Application
Parameter
Specification
Accuracy level
0.5% FS
Voltage Range
10V/60V/100V/200V/300V/500V DC(can produce 20mA input current type)
Working temperature
-20 ℃ to+60 ℃
Data update time
100mS
Isolation withstand voltage
>2500V DC (input voltage and current signals are not isolated from each other)
Auxiliary power supply
24V DC (15V~30V)
Rated power consumption
less than 2W(Typical value 24V power supply 60mA)
Output interface
RS485 or Ethernet(Standard Modus-RTU or Modbus-TCP Protocol)
Data output
24 channels voltage,can measure positive and negative polarity, can customize the active data upload mode
Communication baud rates
4800, 9600, 19200, 28800 bps
Data format
no checksum, 8 data bits, 1 stop bit
Install
35mm DIN rail or screw installation
145X90X40mm,screw installation:135x70mm,installation aperture:5mm
1.LED Burn-In Test Fixtures
Collect voltage readings from multiple LED test positions through one RS485 connection. This configuration suits fixtures where the monitored circuits share a common negative reference. A host system can record readings and apply its own acceptance limits.
2.Automated Production Inspection
Read multiple DC voltage test points during production checks. The 100 ms update interval supports recurring voltage checks across compatible power supply outputs and control circuits.
3.Street Lighting Monitoring
Acquire DC voltage readings from compatible lighting circuits for supervisory monitoring. Verify the grounding arrangement and input range before connecting the module.
Why choose us
Shenzhen JSH Electronic Co.,Ltd supplies DC voltage and current acquisition modules for industrial monitoring and test applications. Share your channel count, maximum input voltage, grounding arrangement and host interface requirements so we can help identify the appropriate model and documentation.
FAQ
1. What does the JSH-42241 measure?
The JSH-42241 measures 24 DC voltage signals and provides readings through RS485 Modbus RTU. DC current measurement requires a corresponding current-input model.
2. Are the 24 voltage channels isolated from one another?
No. The voltage inputs share a common negative connection internally. The module is intended for measurement points that can use the same negative reference.
3. How quickly are the readings updated?
All channel readings are updated every 100 ms. The time required for the host to retrieve the data also depends on the communication settings and polling arrangement.
4. What does 0.5% FS accuracy mean?
It means the stated accuracy is based on the configured full-scale measurement range, rather than the instantaneous measured voltage. Select a range appropriate for the signals being measured.
5. Can I connect the module to a PLC or computer?
A PLC or other host supporting RS485 Modbus RTU can read the module. A computer typically requires an appropriate RS485 interface and compatible Modbus software.
6. Can it directly measure each battery in a series-connected battery string?
Do not connect its input pairs directly across individual series-connected batteries. The channel negatives are internally connected, while the batteries have different negative potentials. Ask JSH Electronic to evaluate a suitable battery monitoring solution.
