Industrial 8-Ch Analog Acquisition Module, 12-Bit High-Precision, Supports Voltage And Current Acquisition, DC 7~36V Wide Voltage Power Supply, Modbus RTU Protocol
Industrial 8-Ch Analog Acquisition Module
12-bit High-precision
Supports Voltage and Current Acquisition
DC 7~36V Wide Voltage
Modbus RTU Protocol
Multiple Isolation Protection
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-1.jpg)
Features At A Glance
Modbus RTU Analog Input 8CH is an industrial standard analog acquisition module, supports multiple ranges and 8-ch simultaneous acquisition. Adopts Modbus RTU protocol with built-in protection circuits such as power isolation, magnetical isolation, resettable fuse, and TVS.
- Configurable device address (1~255), multi devices can be cascaded on RS485 bus
- Onboard voltage regulator, supports 7~36V wide range power supply
- Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
- Onboard unibody magnetical isolation, allows signal isolation, high reliability, strong anti-interference
- Onboard resettable fuse and TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, provides over-current/over-voltage proof, lightningproof & anti-electrostatic
- Supports 12-bit high-precision acquisition with multiple range input modes, supports single-ended/differential input, supports voltage and current simultaneous acquisition
- Adopts high-precision resistors and zero-drift high-precision operational amplifier for more accurate data acquisition
- Built-in oversampling digital filtering algorithm, onboard watchdog, for stable output without crashing
- Rail-mount case design, support stacking combination, easy to install and safer to use
- 3x LEDs for indicating the MCU status and signal transceiving status
Version Options
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-2-1.jpg)
Modbus RTU Analog Input 8CH
Supports four ranges (configurable):
0~5V/1~5V
0~20mA (default) /4~20mA
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-2-2.jpg)
Modbus RTU Analog Input 8CH (B)
Supports four ranges (configurable):
0~10V (default)/2~10V
0~20mA /4~20mA
Specifications
MODEL | Modbus RTU Analog Input 8CH | Modbus RTU Analog Input 8CH (B) |
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COMMUNICATION INTERFACE | RS485 |
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BAUD RATE | 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 |
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DEFAULT COMMUNICATION FORMAT | 9600, N, 8, 1 |
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MODBUS PROTOCOL | Standard Modbus RTU protocol |
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POWER SUPPLY | DC 7~36V |
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SAMPLING ACCURACY | 12-bit resolution, accuracy ≤3% |
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DATA UPDATE RATE | 25Hz |
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INPUT MODE | supports single-ended/differential input, supports voltage and current simultaneous acquisition |
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DEFAULT MODE | 8-ch current mode, 0~20mA | 8-ch voltage mode, 0~10V |
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RANGE | 0~5V/1~5V 0~20mA/4~20mA | 0~10V/2~10V 0~20mA/4~20mA |
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CURRENT SAMPLING RESISTOR | 249Ω | 499Ω |
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Primary Function
Supports Sending Modbus RTU Protocol Commands Via RS485
To Acquire Data From 0~20mA/0~10V Sensor
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-3.jpg)
Industrial Grade Isolated Protection
Onboard power and signal dual isolation for RS485 communication, provides stable isolation voltage, features high reliability and strong anti-interference performance. Built-in TVS (transient voltage suppression tube) can effectively suppress the surge voltage and transient peak voltage in the circuit, lightningproof & ESD protection. Built-in resettable fuse and protection diode to ensure stable current and voltage output, provides over-current and over-voltage proof, improves shock-proof performance, suitable for the industrial environments with high requirement.
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-5.jpg)
Supports Voltage/Current Acquisition
Wider Measurement Range
8-Ch Analog Acquisition Interfaces, Voltage And Current Acquisition Is Switchable Via Jumper. Multiple Ranges Configurable Via Software
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-7.jpg)
Interface Introduction
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-9.jpg)
Connection Diagram
Supports Setting Device Address (1~255) For Multi-Device Cascading, Supports Single-Ended/Differential Input, Supports Voltage And Current Simultaneous Acquisition
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-11.jpg)
Wide Voltage Power Supply, Isolated RS485 Interface
Built-In Fuse And Anti-Reverse Protection, With ESD Protection For Analog Input
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-13.jpg)
Rail-Mount Support
Supports 35mm Standard Guide Rail, With Rail-Mount Buckle, Easy To Install.
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-15.jpg)
Supports Stacking Installation
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-16.jpg)
Product Show
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-17.jpg)
Dimensions
![](https://www.waveshare.com/img/devkit/accBoard/Modbus-RTU-Analog-Input-8CH/Modbus-RTU-Analog-Input-8CH-details-size.jpg)
Resources & Services
![](https://www.waveshare.com/img/devkit/LCD/common/res_banner.png)
PACKAGE CONTENT
The power supply of this product is not included, it is recommended to purchase
12V power supply if you need it.
Modbus RTU Analog Input 8CH
- Modbus RTU Analog Input 8CH x1
- Power supply terminal adapter x1
Modbus RTU Analog Input 8CH (B)
- Modbus RTU Analog Input 8CH (B) x1
- Power supply terminal adapter x1
- Jumper cap 10PCS x1