1. Produk Langkungview
The Waveshare Industrial Modbus RTU Analog Input 8CH module is a high-precision data acquisition device designed for industrial applications. It supports 8 channels of simultaneous analog input with 12-bit resolution, capable of acquiring both voltage and current signals. The module communicates using the standard Modbus RTU protocol via an RS485 interface and features robust isolation and protection circuits for reliable operation in demanding environments.
Fitur konci:
- 12-bit high-precision analog acquisition.
- Supports 8 channels of simultaneous voltage jeung akuisisi ayeuna.
- Configurable input ranges (e.g., 0-5V, 0-10V, 0-20mA, 4-20mA).
- Standard Modbus RTU protocol over RS485.
- Wide DC 7~36V power supply input.
- Industrial-grade isolation: power isolation, magnetical isolation, resettable fuse, TVS (Transient Voltage Suppressor).
- Anti-reverse protection, ESD protection, lightningproof, and anti-surge capabilities.
- Configurable device address (1~255) for multi-device cascading.
- Rail-mount case design for easy installation and stacking.
- LED indicators for RXD, TXD, and STATUS.
2. Eusi Paket
The package contents vary slightly depending on the version of the module. Please verify your specific model.
Modbus RTU Analog Input 8CH (Standard Version):
- Modbus RTU Analog Input 8CH module x1
- Adaptor terminal catu daya x1
Modbus RTU Analog Input 8CH (B Version):
- Modbus RTU Analog Input 8CH (B) module x1
- Adaptor terminal catu daya x1
- Jumper cap 10PCS x1
Note: The power supply for this product is not included. A 12V power supply is recommended if needed.
3. Setélan
3.1 Instalasi fisik
The module features a rail-mount case design, allowing for easy installation on a 35mm standard guide rail. It also supports stacking multiple modules together via screws for compact setups.
3.2 Sambungan Wiring
Refer to the interface introduction and connection diagrams for proper wiring.
- Power Supply (7-36V DC): Connect your DC power source to the 7-36V and GND terminals. The module has built-in anti-reverse protection.
- Antarmuka RS485: Connect the A+ and B- terminals to your RS485 host (e.g., PC or PLC). The RS485 interface is isolated for enhanced reliability.
- Analog Inputs (AI1-AI8): Connect your sensors to the respective AIx+ and AIx- terminals. The module supports single-ended or differential input.
3.3 Input Range Configuration
The module supports both voltage and current acquisition. The acquisition mode (voltage or current) is switchable via jumpers. The specific input ranges are configurable via software.
For the Modbus RTU Analog Input 8CH (Standard):
- Voltage ranges: 0~5V / 1~5V
- Current ranges: 0~20mA (default) / 4~20mA
For the Modbus RTU Analog Input 8CH (B Version):
- Voltage ranges: 0~10V (default) / 2~10V
- Current ranges: 0~20mA / 4~20mA
Consult the product's wiki for detailed instructions on jumper settings and software configuration.
4. Parentah Operasi
The module operates as an analog acquisition device, receiving commands via the Modbus RTU protocol over RS485 to acquire data from connected sensors.
4.1 Modbus RTU Communication
The module uses the standard Modbus RTU protocol. You will need a Modbus master device (e.g., PC with Modbus software, PLC) to send commands and read data from the module.
- Alamat alat: The module's address is configurable from 1 to 255. This allows multiple modules to be connected on the same RS485 bus.
- Tingkat baud: Supported baud rates include 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000.
- Default Communication Format: 9600, N, 8, 1 (9600 baud, No parity, 8 data bits, 1 stop bit).
For detailed Modbus register maps and command structures, refer to the product's official wiki.
4.2 Indikator LED
- RXD LED: Nunjukkeun panarimaan data.
- TXD LED: Indicates data transmission.
- LED STATUS: Indicates the MCU's working status.
5. Pangropéa
The Waveshare Modbus RTU Analog Input 8CH module is designed for industrial reliability and generally requires minimal maintenance. Ensure the module is installed in a clean, dry environment within its specified operating temperature range.
- beberesih: Upami diperlukeun, gently ngabersihan exterior modul jeung lemes, lawon garing. Ulah make cleaners cair atawa pangleyur.
- Sambungan: Périodik pariksa sagala sambungan wiring pikeun mastikeun aranjeunna aman tur bebas tina korosi.
- Firmware: Check the Waveshare wiki for any available firmware updates that may improve performance or add features.
6. Cara ngungkulan
This section addresses common issues you might encounter with the Modbus RTU Analog Input 8CH module.
6.1 Masalah Komunikasi
- No communication / RXD/TXD LEDs not blinking:
- Verify RS485 wiring (A+ to A+, B- to B-).
- Ensure the power supply is connected correctly and within the 7-36V DC range.
- Check that the baud rate and communication format (parity, data bits, stop bits) on your Modbus master match the module's settings (default: 9600, N, 8, 1).
- Confirm the module's device address is unique on the bus and matches the address used by the Modbus master.
- Incorrect data readings:
- Verify sensor connections to the analog input terminals.
- Check jumper settings for voltage/current acquisition mode.
- Ensure the software-configured input range matches the sensor's output and the physical jumper settings.
- Consult the Modbus register map on the Waveshare wiki to ensure you are reading the correct registers for analog data.
6.2 Masalah kakuatan
- Module not powering on (STATUS LED off):
- Pariksa catu daya voltage jeung polaritasna.
- Ensure the power supply is capable of providing sufficient current.
- Inspect the power supply terminal adapter and connections.
7. Spésifikasi
| Fitur | Modbus RTU Analog Input 8CH (Standard) | Modbus RTU Analog Input 8CH (B Version) |
|---|---|---|
| Antarbeungeut Komunikasi | RS485 | |
| Laju Baud | 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 | |
| Format Komunikasi Standar | 9600, N, 8, 1 | |
| Protokol Modbus | Protokol Modbus RTU standar | |
| Sasayogian tanaga | DC 7 ~ 36V | |
| Sampling Akurasi | 12-bit resolution, accuracy ≤3% | |
| Laju Update Data | 25Hz | |
| Modeu Input | Supports single-ended/differential input, voltage and current simultaneous acquisition | |
| Modeu standar | 8-ch current mode, 0~20mA | Volum 8-chtage mode, 0~10V |
| Configurable Ranges | 0~5V/1~5V (Voltage) 0~20mA/4~20mA (Current) | 0~10V/2~10V (Voltage) 0~20mA/4~20mA (Current) |
| Ayeuna SampResistor ling | 249Ω | 499Ω |
| Ukuran (L x W x H) | 121.0 mm x 72.0 mm x 35.0 mm | |
| Beurat | 0.141 kg | |
8. Tips pamaké
- Modbus Map: For integration with HMIs or other Modbus master devices, the Modbus register map is essential. Always refer to the official Waveshare Wiki for the most up-to-date Modbus map and detailed communication protocols.
- Range Configuration: Pay close attention to both the physical jumper settings and the software configuration for input ranges (voltage/current, and specific ranges like 0-5V vs 1-5V). Mismatched settings can lead to incorrect readings.
- Baud Rate Adjustment: If you need to adjust the baud rate from the default, ensure your Modbus master is configured to match the new setting. This is a common point of failure for communication.
- Sasayogian tanaga: While the module supports a wide voltage range, using a stable and clean power supply (e.g., a regulated 12V supply) is crucial for optimal performance and accuracy.
9. Garansi jeung Rojongan
For technical support, detailed documentation, examples, and the Modbus register map, please visit the official Waveshare Wiki:
www.waveshare.com/wiki/Modbus_RTU_Analog_Input_8CH
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