دستور+

Waveshare Modbus RTU Analog Input 8CH

Waveshare Industrial Modbus RTU Analog Input 8CH Module

ھدايت وارو دستور

Model: Modbus RTU Analog Input 8CH

1. تعارف

The Waveshare Industrial Modbus RTU Analog Input 8CH module is a high-precision industrial-grade data acquisition device designed for robust and reliable performance in various industrial environments. It supports 8 channels of simultaneous analog input, capable of acquiring both voltage and current signals with 12-bit resolution. Utilizing the standard Modbus RTU protocol over an RS485 interface, this module offers wide compatibility with industrial control systems such as PLCs and host computers.

Key features include a wide DC 7~36V power supply range, multiple isolation protections (power, magnetic, resettable fuse, TVS), and configurable input ranges, making it a versatile solution for precise analog data monitoring.

Waveshare Modbus RTU Analog Input 8CH Module with highlighted features
Figure 1: Waveshare Industrial Modbus RTU Analog Input 8CH Module highlighting 12-bit high-precision, voltage/current acquisition, wide voltage, Modbus RTU, and multiple isolation protection.

2. Features At A Glance

  • High-Precision Acquisition: 12-bit resolution with an accuracy of ≤3% for precise data.
  • Multi-Channel Input: 8-channel simultaneous analog acquisition.
  • لچڪدار ان پٽ موڊ: Supports single-ended/differential input and simultaneous voltagاي ۽ موجوده حصول.
  • Configurable Ranges: گھڻن جلدtage and current ranges configurable via software (e.g., 0-5V, 1-5V, 0-10V, 2-10V, 0-20mA, 4-20mA).
  • Modbus RTU Protocol: Standard protocol for wide compatibility with industrial systems.
  • RS485 انٽرفيس: Allows cascading of multiple devices with configurable addresses (1~255).
  • وسيع جلدtage بجلي جي فراهمي: Operates on DC 7~36V.
  • Industrial-Grade Isolation: Onboard unibody power supply isolation and magnetic isolation for signal integrity and strong anti-interference.
  • مضبوط تحفظ: Features resettable fuse, TVS (Transient Voltage Suppressor) for surge, over-current/over-voltage, lightningproof, and ESD protection.
  • مستحڪم آپريشن: Built-in oversampling digital filtering algorithm and watchdog for stable output without crashing.
  • آسان تنصيب: Rail-mount case design (35mm standard guide rail) and support for stacking combination.
  • حيثيت جا اشارو: Three LEDs (RXD, TXD, STATUS) for monitoring MCU and communication status.

3. وضاحتون

پيرا ميٽر Modbus RTU Analog Input 8CH Modbus RTU Analog Input 8CH (B)
ڪميونيڪيشن انٽرفيس RS485
بيڊ جي شرح 4800، 9600، 19200، 38400، 57600، 115200، 128000، 256000
Default Communication Format 9600، اين، 8، 1
Modbus پروٽوڪول Standard Modbus RTU protocol
بجلي جي فراهمي ڊي سي 7 ~ 36V
Sampling جي درستگي 12-bit resolution, accuracy ≤3%
ڊيٽا اپڊيٽ جي شرح 25Hz
انپٽ موڊ Supports single-ended/differential input, supports voltage and current simultaneous acquisition
طئي ٿيل موڊ 8-ch current mode, 0~20mA 8-ch voltage mode, 0~10V
حد 0~5V/1~5V
0~20mA/4~20mA		 0~10V/2~10V
0~20mA/4~20mA
موجوده Sampling Resistor 249Ω 499Ω
Dimensions of the Modbus RTU Analog Input 8CH module in millimeters
Figure 2: Module Dimensions (Unit: mm)

4. پيڪيج مواد

The package contents vary slightly depending on the version purchased:

Modbus RTU Analog Input 8CH (Standard Version)

  • Modbus RTU Analog Input 8CH x1
  • Power supply terminal adapter x1
Package content for Modbus RTU Analog Input 8CH standard version
Figure 3: Package contents for the standard 8CH module.

Modbus RTU Analog Input 8CH (B) (B Version)

  • Modbus RTU Analog Input 8CH (B) x1
  • Power supply terminal adapter x1
  • Jumper cap 10PCS x1
Package content for Modbus RTU Analog Input 8CH (B) version
Figure 4: Package contents for the 8CH (B) module.

نوٽ: The power supply for this product is not included. A 12V power supply is recommended if needed.

5. سيٽ اپ ۽ تنصيب

5.1 انٽرفيس ختمview

Familiarize yourself with the module's interfaces:

Interface diagram of the Modbus RTU Analog Input 8CH module showing power, RS485, analog inputs, and LED indicators
Figure 5: Module Interface Introduction. Labels include 7-36V DC Power supply, GND, AI1-AI8 inputs, A+, B- for RS485, and RXD, TXD, STATUS LED indicators.

5.2 پاور سپلائي ڪنيڪشن

Connect a DC 7~36V power supply to the 7-36V ۽ GND terminals. Ensure correct polarity. The module features anti-reverse protection, ESD protection, and power supply/signal dual isolation for enhanced safety and reliability.

Wiring diagram for DC power supply and isolated RS485 interface with protection features
Figure 6: Wide Voltage Power Supply and Isolated RS485 Interface Connection. Illustrates DC 7-36V power input and isolated RS485 connection, along with anti-reverse, ESD, and dual isolation protection.

5.3 RS485 ڪميونيڪيشن ڪنيڪشن

Connect the RS485 A+ and B- terminals to your host device (PC or PLC). Multiple modules can be cascaded on the RS485 bus by setting unique device addresses (1~255) for each module.

Connection diagram showing multi-device cascading via RS485 and simultaneous voltage/current acquisition
Figure 7: Connection Diagram. Shows how the module connects to a host via RS485 and supports multi-device cascading, as well as simultaneous voltagاي ۽ موجوده حصول.

5.4 Analog Input Configuration

The module supports both voltage and current acquisition. The input mode (voltage or current) is switchable via jumpers. Specific ranges are configurable via software.

  • Modbus RTU Analog Input 8CH (Standard): Supports 0~5V/1~5V and 0~20mA (default)/4~20mA.
  • Modbus RTU Analog Input 8CH (B): Supports 0~10V (default)/2~10V and 0~20mA/4~20mA.

Refer to the detailed wiring and jumper settings in the diagram below for configuring voltage or current acquisition and selecting the appropriate range.

Diagram illustrating jumper settings for voltage and current acquisition and configurable ranges for both module versions
شڪل 8: Voltage/Current Acquisition and Configurable Ranges. Shows jumper positions for voltage (OFF) and current (ON) acquisition, and the available ranges for both 8CH and 8CH (B) versions.

5.5 Physical Installation (Rail-Mount)

The module is designed for 35mm standard guide rail mounting. It comes with a rail-mount buckle for easy installation. For stacking multiple modules, remove the rail-mount buckle from the outer module, then assemble the modules together using screws.

Module mounted on a 35mm standard guide rail
Figure 9: Rail-Mount Support. The module is shown securely mounted on a 35mm standard guide rail.
Diagram showing how to stack multiple modules together
Figure 10: Stacking Installation. Instructions for combining multiple modules via screws after removing the rail-mount buckle.

6. آپريٽنگ هدايتون

6.1 Primary Function

The module's primary function is to acquire analog data from 0~20mA or 0~10V sensors and transmit it to a host device (PC or PLC) using Modbus RTU protocol commands via the RS485 interface.

Diagram showing the data flow from sensor to host via the acquisition module
Figure 11: Primary Function. Data acquisition flow from a 0-20mA/0-10V sensor through the acquisition module to a host system via RS485.

6.2 Modbus RTU Communication

The module operates as a Modbus RTU slave device. Your host system (master) will send Modbus commands to read the analog input registers. The default communication format is 9600, N, 8, 1 (Baud Rate, Parity, Data Bits, Stop Bits). The device address is configurable from 1 to 255.

For detailed Modbus register maps and command structures, please refer to the product's Wiki page mentioned in the 'Warranty & Support' section.

6.3 LED اشارا

  • RXD LED: Indicates data reception activity on the RS485 interface.
  • TXD LED: Indicates data transmission activity on the RS485 interface.
  • اسٽيٽس LED: Indicates the MCU's working status. Refer to the Wiki for specific status codes or patterns.

7. سار سنڀال

  • صفائي: ماڊيول کي صاف ۽ مٽي ۽ ملبي کان پاڪ رکو. صفائي لاءِ نرم، سڪل ڪپڙو استعمال ڪريو. مائع يا رگڙيندڙ ڪلينر استعمال ڪرڻ کان پاسو ڪريو.
  • ماحولياتي حالتون: پڪ ڪريو ته ماڊل نقصان کان بچڻ لاءِ ان جي مخصوص درجه حرارت ۽ نمي جي حدن اندر ڪم ڪري ٿو.
  • فرم ويئر اپڊيٽس: Check the Waveshare Wiki periodically for any available firmware updates that may improve performance or add features. Follow the instructions provided for safe updating.
  • ڪنيڪشن جي سالميت: Regularly inspect all wiring connections (power, RS485, analog inputs) to ensure they are secure and free from corrosion or damage.

8. مسئلا حل ڪرڻ

  • ڪابه طاقت ناهي/ماڊيول جواب نه ڏئي رهيو آهي:
    • Verify the DC 7~36V power supply is correctly connected and providing the specified voltage.
    • Check the power supply terminal adapter for proper connection.
    • Ensure the power supply itself is functional.
  • No Communication via RS485:
    • Confirm RS485 A+ and B- connections are correct.
    • Check the baud rate, parity, data bits, and stop bits settings on both the module (default 9600, N, 8, 1) and the host device.
    • Verify the module's device address is unique and matches the address used by the host.
    • Ensure the RS485 bus is properly terminated if necessary (refer to RS485 best practices).
    • Check the RXD/TXD LEDs for activity. If no activity, check wiring and host communication settings.
  • Inaccurate Analog Readings:
    • Confirm the correct input mode (voltage/current) is selected via jumpers.
    • Verify the software-configured range matches the sensor's output range.
    • Ensure the sensor is correctly wired to the AIx+ and AIx- terminals.
    • Check for external electrical noise or interference in the environment.
    • Ensure the sensor itself is calibrated and functioning correctly.
  • Module Crashing/Unstable:
    • While the module has a built-in watchdog, ensure the power supply is stable and within the specified voltage حد.
    • Check for excessive heat if operating in a confined space.

9. استعمال ڪندڙ ٽوٽڪا

  • سافٽ ويئر ترتيب: Always refer to the official Waveshare Wiki for the latest software tools and detailed instructions on configuring input ranges and device addresses.
  • Wiring Best Practices: For industrial environments, use shielded cables for analog inputs and RS485 communication to minimize interference. Ensure proper grounding.
  • جاچ: Before deploying in a critical application, thoroughly test the module with known voltage/current sources across all desired ranges to verify accuracy and stability.
  • دستاويز: Keep a record of your module's configuration (device address, baud rate, input ranges) for easier troubleshooting and maintenance.

10. وارنٽي ۽ سپورٽ

For detailed technical documentation, programming guides, software tools, and further support, please visit the official Waveshare Wiki:

www.waveshare.com/wiki/Modbus_RTU_Analog_Input_8CH

Waveshare Resources & Services logo
Figure 12: Waveshare Resources & Services.

Waveshare provides comprehensive resources to assist users with their products. Please refer to the Wiki for the most up-to-date information and troubleshooting guides.

لاڳاپيل دستاويز - Modbus RTU Analog Input 8CH

اڳيview ويو شيئر موڊبس آر ٽي يو اينالاگ ان پٽ 8CH - استعمال ڪندڙ مينوئل ۽ ٽيڪنيڪل وضاحتون
Comprehensive guide to the Waveshare Modbus RTU Analog Input 8CH module, covering hardware description, version comparison, configuration, software testing with SSCOM and Modbus Poll, and development protocols for Raspberry Pi, STM32, and Arduino.
اڳيview ماڊل d'entrée Analogique Modbus RTU 8 Canaux par Waveshare
Ce document technique présente le module d'entrée analogique 8 canaux Modbus RTU de Waveshare, conçu pour l'acquisition de données de tension et de courant dans les systèmes d'automatisation industrielle. Il détaille les spécifications techniques, les méthodes de connexion, les tests logiciels et le protocole de communication Modbus.
اڳيview ويو شيئر موڊبس آر ٽي يو اينالاگ آئوٽ پُٽ 8CH - ٽيڪنيڪل گائيڊ ۽ پروٽوڪول
Comprehensive technical guide for the Waveshare Modbus RTU Analog Output 8CH module. Covers hardware description, version comparison, hardware connection, software testing with SSCOM and Modbus Poll, demo procedures for Raspberry Pi, STM32, Arduino, and PLC, and a detailed Modbus development protocol V2.
اڳيview موڊبس آر ٽي يو رلي: يوزر مينوئل ۽ ٽيڪنيڪل گائيڊ
موڊبس آر ٽي يو رلي لاءِ جامع گائيڊ، حفاظتي هدايتون، هارڊويئر ڪنيڪشن، ايس ايس ڪام ۽ موڊبس پول سان سافٽ ويئر سيٽ اپ، ۽ مختلف آپريشنز لاءِ تفصيلي ڪمانڊ پروٽوڪول شامل آهن. شامل آهن اڳوڻيampراسبي پائي، ايس ٽي ايم 32، آرڊينو، ۽ پي ايل سي انٽيگريشن لاءِ سبق.
اڳيview موڊبس آر ٽي يو رلي 32CH يوزر مينوئل ۽ ٽيڪنيڪل گائيڊ
Modbus RTU Relay 32CH لاءِ جامع يوزر مينوئل ۽ ٽيڪنيڪل گائيڊ. صنعتي آٽوميشن لاءِ حفاظت، هارڊويئر، سافٽ ويئر انٽيگريشن (Raspberry Pi، STM32، Arduino، PLC)، ۽ Modbus RTU ڪمانڊ پروٽوڪول کي ڍڪي ٿو.
اڳيview ويو شيئر سولر پاور مئنيجر يوزر مينوئل
User manual for the Waveshare Solar Power Manager module, detailing its features, specifications, board components, usage instructions, and applications for solar energy charging with 6V-24V solar panels and 3.7V Li batteries.