Waveshare Industrial Modbus RTU 8-ch Relay Module (D) With Digital Input and RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply

Industrial Modbus RTU 8-ch Relay Module (D) With Digital Input and RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply

This is an industrial 8-ch relay module controlled via RS485 bus, with 8-ch digital input, utilizing Modbus RTU protocol. It features embedded protection circuits such as power isolation, magnetical isolation, and TVS diode, etc. It also comes with an ABS enclosure. The Modbus RTU Relay (D) 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.

Features

Configurable device address (1~255), multi devices can be cascaded on RS485 bus
Features flash-on, flash-off function, by passing argument to the command, it is possible to turn on the relay for a while and then close it automatically
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, 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
Supports passive and active digital input, with bi-directional optocoupler isolation, built in debouncing algorithm. The relay supports digital input linkage control or toggle control
Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection
High quality relay, contact rating: ≤10A 250VAC/30VDC
Rail-mounted ABS plastic enclosure, easy to install, safe to use
Multiple LEDs for indicating the MCU status and signal transceiving status

Specifications

Power Supply : 7~36V
Communication Interface : RS485
Baudrat : 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
Default Communication Format : 9600, N, 8, 1
Relay Channels : 8 Channels
Contact Form : 1NO, 1NC
Contact Load : ≤10A 250V AC or ≤10A 30V DC
Digital Input : 8DI, 5~36V, passive / active input (NPN or PNP), built-in bi-directional optocoupler isolation
Modbus Protocol : Standard Modbus RTU protocol
RS485 Address Setting : 1~255
Indicator : STA: MCU indicator, keep flashing when MCU normally working / TXD: TX indicator, lights up when sending data / RXD: RX indicator, lights up when receiving data

User Manual / Datasheet / Example Codes Etc.