1. 제품 오버view
The Waveshare Modbus POE ETH Relay is an industrial-grade 8-channel relay module designed for control via an Ethernet port. It supports both Modbus RTU and Modbus TCP protocols, offering versatile communication options. This module also features Power over Ethernet (PoE) for simplified power supply and comes housed in a durable ABS rail-mount case for easy installation in industrial environments.
그림 1: 상향식 view of the Waveshare Modbus POE ETH Relay Module, showing relay channels, Ethernet port, and power input.
2. 주요 특징
- 8-Channel Relay Control: Provides eight independent relay channels for controlling various devices.
- Modbus Protocol Support: Compatible with Modbus RTU and Modbus TCP protocols for industrial automation.
- PoE 전원 공급 장치: Supports IEEE 802.3af compliant Power over Ethernet, simplifying wiring.
- 와이드볼tage 입력: Accepts DC 7V to 36V power input via screw terminal or DC 5.5*2.1 power port.
- 플래시 켜짐/꺼짐 기능: Allows temporary relay activation with automatic deactivation after a specified duration.
- MQTT 프로토콜 지원: Enables control through MQTT, with an Alibaba Cloud MQTT application demo available.
- 옵토커플러 절연: Onboard optocoupler isolation protects the relay from high-voltage circuit interference.
- 역방향 오류 방지 회로: Integrated protection against accidental damage from incorrect power connection.
- 고품질 릴레이: Contact rating of ≤10A 250VAC/30VDC, suitable for controlling home appliances or low-voltage DC devices.
- 레일 장착형 ABS 케이스: Durable and safe enclosure designed for easy installation on DIN rails.
- 상태 표시기 : Four LEDs (RUN, STA, TXD, RXD) and network indicators provide real-time status feedback.
3. 설정 및 설치
3.1 전원 공급 옵션
The module offers flexible power input methods:
- PoE 포트: Connect an IEEE 802.3af compliant PoE switch or injector to the Ethernet port.
- DC 5.5*2.1 Power Port: Use a DC 7V-36V power adapter.
- 나사식 터미널: Connect a DC 7V-36V power source to the designated screw terminals.
Figure 2: Illustration of multiple power supply options including PoE, DC power port, and screw terminals.
3.2 네트워크 연결
Connect the module to your network using a standard Ethernet cable. If using PoE, ensure your network equipment supports it. The module supports TCP Server, TCP Client, UDP Mode, UDP Multicast, HTTP, and MQTT communication modes.
3.3 릴레이 연결
Each of the 8 relay channels provides 1 Normally Open (NO) and 1 Normally Closed (NC) contact. The common (COM) terminal is also available. Ensure that the connected load's voltage and current do not exceed the relay's contact rating of ≤10A 250VAC/30VDC.
- For AC 220V devices, connect the device in series with the COM and NO/NC terminals.
- For DC 30V devices, connect the device in series with the COM and NO/NC terminals, observing polarity if necessary for the device.
Figure 3: Wiring diagrams for connecting AC 220V and DC 30V devices to the relay contacts.
3.4 Rail-Mount Installation
The module is designed with an ABS protective enclosure for rail mounting. Simply clip the module onto a standard DIN rail in your control cabinet or enclosure.
4. 사용 설명서
4.1 통신 프로토콜
The module primarily communicates using Modbus RTU and Modbus TCP protocols. Commands are sent via the Ethernet port to control the relays.
- 모드버스 RTU: Typically used over serial communication, but supported over Ethernet for compatibility.
- 모드버스 TCP: Standard protocol for Modbus communication over Ethernet networks.
Refer to the official Waveshare documentation or development resources for detailed Modbus register maps and command structures.
4.2 Flash-on, Flash-off Function
This feature allows you to momentarily activate a relay. By passing a specific argument with the control command, the relay will turn on for a set duration and then automatically turn off. Consult the programming guide for command syntax and timing parameters.
4.3 MQTT Control
The module supports control via MQTT protocol. This enables integration with IoT platforms and cloud services. An Alibaba Cloud MQTT application demo is available for reference, demonstrating how to publish commands and subscribe to status updates.
4.4 상태 표시기
Monitor the module's operational status using the onboard LEDs:
- RUN (Ethernet Port Indicator): Blinks in 2-second cycles when the Ethernet port is functioning normally.
- STA (MCU Indicator): Blinks when the Microcontroller Unit (MCU) is operating normally.
- TXD (Transmit Data Indicator): 모듈이 데이터를 전송할 때 불이 켜집니다.
- RXD (Receive Data Indicator): 모듈이 데이터를 수신할 때 불이 켜집니다.
- 이더넷 포트 녹색 표시등: Lights up when a network connection is established.
- 이더넷 포트 노란색 표시등: Blinks to indicate data activity (transmitting/receiving).
그림 4: 상세 view of the module's interfaces and LED indicators.
5. 유지관리
The Waveshare Modbus POE ETH Relay module is designed for industrial reliability and requires minimal maintenance. However, adhering to the following guidelines can ensure optimal performance and longevity:
- 환경 조건: Operate the module within its specified temperature and humidity ranges. Avoid exposure to excessive dust, moisture, or corrosive substances.
- 청소: If necessary, gently clean the exterior of the module with a soft, dry cloth. Do not use liquid cleaners or solvents. Ensure the device is powered off before cleaning.
- 펌웨어 업데이트: 웨이브쉐어 공식 웹사이트를 주기적으로 확인하세요. web사용 가능한 펌웨어 업데이트는 해당 사이트에서 확인하십시오. 업데이트 절차는 제공된 지침을 주의 깊게 따르십시오.
- 연결 무결성: Regularly inspect all power and network connections to ensure they are secure and free from damage.
6. 문제 해결
This section provides solutions to common issues you might encounter with the Modbus POE ETH Relay module.
| 문제 | 가능한 원인 | 해결책 |
|---|---|---|
| 모듈의 전원이 켜지지 않습니다. | 잘못된 전원 공급 장치 볼륨tage or polarity; faulty power source; PoE not active or incompatible. | Verify power input (7-36V DC) and polarity. Ensure PoE source is active and compliant with IEEE 802.3af. Check power cables and connections. |
| No network connection (Ethernet Green LED off). | Faulty Ethernet cable; network switch/router issue; incorrect network settings. | Check Ethernet cable for damage and proper connection. Verify network switch/router status. Ensure module's network settings (IP address, subnet mask) are correct. |
| Relays not responding to commands. | Incorrect Modbus address or function code; communication protocol mismatch; software configuration error. | Confirm Modbus RTU/TCP settings and relay addresses. Verify the commands sent match the protocol specifications. Check software configuration for errors. Ensure the MCU (STA LED) is blinking normally. |
| Intermittent relay operation. | 대용량tage interference; unstable power supply; loose connections. | Ensure proper grounding. Check for strong electromagnetic interference sources. Verify power supply stability. Secure all wiring connections. |
If you encounter issues not covered here, please refer to the official Waveshare online development resources or contact technical support.
7. 사양
| 매개변수 | 값 |
|---|---|
| 모델 | Modbus POE ETH Relay |
| 전원 공급 장치 | PoE (IEEE 802.3af compliant), DC 5.5*2.1 port, or Screw terminal (7~36V DC) |
| 통신 인터페이스 | Ethernet (PoE port) |
| 릴레이 채널 | 8 |
| 문의 양식 | 1NO 1NC per channel |
| 연락처 평가 | ≤10A 250VAC / 30VDC |
| 모드 버스 프로토콜 | Modbus RTU Protocol, Modbus TCP Protocol |
| 작동 모드 | 오토매틱 |
| 제품 치수 | 5.7 x 3.54 x 1.57인치(145 x 90 x 40mm) |
| 무게 | 8.82 온스(250g) |
그림 5: 모듈의 외형 치수.
8. 보증 및 지원
웨이브쉐어 제품은 뛰어난 신뢰성과 성능을 위해 설계되었습니다. 구체적인 보증 정보는 웨이브쉐어 공식 웹사이트를 참조하십시오. web사이트를 방문하거나 구매처에 문의하세요.
For technical assistance, online development resources, and further documentation, please visit the official Waveshare support portal. If you encounter any problems or require detailed guidance, do not hesitate to contact Waveshare technical support directly.
Note: Online Development Resources and Technical Support are provided.
