8-Channel Resistance Measurement Module for Component Testing
Product No.: JSH-T08R
Measurement Range: 20mΩ to 40MΩ
ADC Resolution: 32-bit High Precision ADC
Measurement Channels: 8 Channels
Resolution: Up to 0.001Ω
8 Channel Resistance Measurement Module 20mΩ to 40MΩ RS485 Modbus RTU/TCP Resistance Acquisition Module
Product Overview
The 8 Channel Resistance Measurement Module is a high-precision industrial resistance acquisition device featuring a 32-bit ADC and ARM-based MCU. It supports resistance measurement from 20mΩ to 40MΩ with up to 0.1% full-scale accuracy and 1mΩ resolution. Designed for industrial automation, quality control, sensor testing, and resistance monitoring applications, the module supports RS485 Modbus RTU and Modbus TCP communication with isolated power and communication interfaces for reliable operation in harsh industrial environments.
Model Selection
JSH-T08R-14N1:8 channel resistance measurement module,RS485
JSH-T08R-34N1:8 channel resistance measurement module,RS485+Ethernet
Key Features
1.8 Independent Resistance Measurement Channels
2.Wide Measurement Range from 20mΩ to 40MΩ
3.High Precision 32-bit ADC Architecture
4.Resolution up to 0.001Ω
5.Full Scale Accuracy up to 0.1%
6.Adjustable Sampling Rate (30ms–600ms)
7.Automatic and Fixed Range Selection
8.Common Point Measurement Mode
9.Line Resistance Compensation Function
10.Surge and Overvoltage Protection
11.Maximum Input Protection up to 60V
12.RS485 Modbus RTU Communication
13.Optional Ethernet Modbus TCP
14.Triple Isolation Protection Design
15.DIN Rail Installation
Technical Specification
Applications
Item
Specification
Product Name
8 Channel Resistance Measurement Module
Measurement Channels
8 Channels
Measurement Range
20mΩ to 40MΩ
ADC Resolution
32-bit High Precision ADC
Minimum Resolution
0.001Ω
Minimum Measurement Value
0.02Ω
Maximum Measurement Value
40MΩ
Measurement Accuracy
0.1% Full Scale
Minimum Error
0.01Ω
Temperature Drift
≤ ±30ppm/°C
Sampling Rate
30ms / 100ms / 300ms / 600ms Configurable
Measurement Modes
Auto Range / Fixed Range
Fixed Measurement Ranges
25Ω, 1kΩ, 5kΩ, 20kΩ, 100kΩ, 1MΩ, 10MΩ, 40MΩ
Auto Range
0.02Ω to 40MΩ
Line Resistance Compensation
Supported
Common Point Measurement Mode
Supported
Unused Channel Masking
Supported
Excitation Voltage
<2V (Low Resistance), <2.6V (High Resistance)
Excitation Current
<1mA
Input Protection
Surge and Overvoltage Protection
Maximum Input Voltage
60V
Power Supply
9~30VDC
Power Consumption
<1W (Without Ethernet), <3W (With Ethernet)
Communication Interface
RS485 / Ethernet + RS485
Communication Protocol
Modbus RTU / Modbus TCP
Baud Rate
4800, 9600, 19200, 38400, 57600, 115200 bps
Data Format
8 Data Bits, No/Odd/Even Parity, 1 or 2 Stop Bits
Isolation Protection
Power, Communication and Measurement Circuits Isolated
Isolation Voltage
>1500VDC
Operating Temperature
-40°C to +70°C
Mounting Method
35mm DIN Rail or Screw Mounting
Dimensions (L × W × H)
115 × 90 × 40 mm
Screw Mounting Size
105 × 70 mm
Weight
Approx. 150g
1.Resistor Component Inspection
Measure multiple resistive components in an automated inspection station. Configure suitable ranges for each channel and compensate lead resistance where necessary.
2.Multi-Point Resistance Testing
Connect up to eight resistive test points to one module. Use fixed ranges for predictable resistance values or automatic segmented measurement when improved accuracy across a wider span is required.
3.Resistance-Based Temperature Monitoring
Use compatible PT100, PT1000, copper RTD or specified NTC sensors for multi-point temperature acquisition. Confirm the required temperature span, sensor wiring and measurement accuracy before ordering.
4.PLC and Industrial PC Test Systems
Read measurements through RS485 or Ethernet using the appropriate Modbus configuration. CAN + RS485 versions are also available for systems requiring those interfaces.
Why Choose JSH-T08R?
The JSH-T08R combines low- and high-resistance measurement in one eight-channel module. Independent channel ranges, selectable acquisition speeds and multiple communication versions help adapt the module to different test-system requirements.
FAQ
1. What resistance range can the JSH-T08R measure?
The module covers 0.02 Ω to 40 MΩ through eight selectable ranges. Each channel can have its own range setting.
2. Does it support four-wire resistance measurement?
No. The V6.52 version uses two-wire measurement. Channel-specific compensation registers can correct lead-resistance errors.
3. Are all eight channels updated every 35 ms?
No. The fastest listed 35 ms value applies to one channel under specific fixed-range conditions. The complete cycle depends on the enabled channels, their range settings, acquisition speed and measurement mode.
4. Are the resistance channels isolated from each other?
No. The acquisition inputs, power supply and communication are isolated from each other, but the measurement channels are not mutually isolated.
5. Can it measure PT100 or PT1000 sensors?
Yes. The module supports PT100, PT1000, Cu50, Cu100 and NTC 10 kΩ B3435 sensors. Confirm the temperature range and accuracy required for your application.
6. Can it measure resistance on powered equipment?
No. Resistance measurements must be performed on de-energized test objects. The module is intended for low-capacitance, low-inductance resistive loads.
