Waveshare Industrial Modbus RTU 8-ch Relay Module (E) with RS485 Interface, 30A High Current, Multi Isolation Protection Circuits, Rail-mounted Case

Waveshare Industrial Modbus RTU 8-ch Relay Module (E) with RS485 Interface, 30A High Current, Multi Isolation Protection Circuits, Rail-mounted Case

This is an industrial 8-ch relay module controlled via RS485 bus, utilizing Modbus RTU protocol. It features embedded protection circuits such as power isolation, ADI magnetical isolation, resettable fuse, and TVS diode, etc. It also comes with an ABS enclosure. The Modbus RTU Relay (E) is very easy to use. Due to its fast communication, stability, reliability, and safety, it is an ideal choice for industrial control equipments and/or applications with high communication requirement.

User Manual / Datasheet / Example Codes Etc.

Features

• Configurable device address (1~255), multi devices can be cascaded on RS485 bus
• Features flash-on, flash-off function, by passing arguments to the command, it is possible to turn on the relay for a while and then close it automatically
• Onboard voltage regulator, supports 7V~36V wide voltage supply
• Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
• Onboard unibody ADI magnetical isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption
• Onboard resettable fuse and TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, provides over-current/over-voltage proof, lightningproof & anti-electrostatic
• Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit
• Adopts dedicated relay driver chip, with built-in flyback diode protection, for stronger and more stable driving ability
• Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection
• High quality relay, contact rating: ≤30A 250V AC or ≤30A 28V DC
• Rail-mounted ABS plastic enclosure, easy to install, safe to use
• 3 LEDs for indicating the MCU status and signal transceiving status

Specifications

• Power supply: 7~36V
• Communication interface: RS485
• Baudrate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
• Default communication format: 9600, N, 8, 1
• Relay channels: 8
• Contact form: 1NO 1NC
• contact rating: ≤30A 250V AC or ≤30A 28V DC
• Communication protocol: Standard Modbus RTU protocol
• RS485 address: 1~255
• LED indicators
• STA: MCU indicator, keeps flashing when the MCU is normally working
• TXD: TX indicator, lights up when sending data
• RXD: RX indicator, lights up when receiving data

Package Includes

• 1x Modbus RTU Relay (E)

Hardware Analysis

Multiple protections for safer and more reliable use

Interfaces & Indicators

With Multiple LED Indicators, Easy To Monitor The Operating Status

RS485 Communication

Configurable device address (1~255), multi devices can be cascaded on RS485 bus

In case of many devices are cascaded, or communication distance is quite long, it is necessary to use RS485 repeaters

Relay connection

Contact rating of the onboard relay up to 30A 250V AC or 30A 28V DC

Dimensions