Industrial Modbus RTU 8-ch Relay Module (B) with RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply

Reference : MRE03053

€34.90

Tax included

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, and TVS diode, etc. It also comes with an ABS enclosure.

If you want to know more about this product, please check the Wiki Page.

Note: This is the 7~36V version, if you want the 5V version, just click Here.

Description

If you have any questions on this product please feel free to contact us.

*Disclaimer: The images are merely illustrative.

Features At A Glance

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, magnetical isolation, and TVS diode, etc. It also comes with an ABS enclosure. The Modbus RTU Relay (B) 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.

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
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
3 LEDs for indicating the MCU status and signal transceiving status

Specifications

PRODUCT	Modbus RTU Relay	Modbus RTU Relay (B)
Power supply	5V	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	≤10A 250VAC/30VDC
Communication protocol	Standard Modbus RTU protocol
RS485 address	1~255
LED indicators	STA: MCU indicator, keeps flashing when the MCU normally working TXD: TX indicator, lights up when sending data RXD: RX indicator, lights up when receiving data

Hardware Analysis

Multiple protections for safer and more reliable use

Enclosure Design

Rail-mounted ABS plastic enclosure, easy to install, safe to use

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

for reference only, the USB TO RS232/485/TTL converter is Not included

Relay connection

Contact rating of the onboard relay up to 10A 250VAC/30VDC
Directly controlling 220VAC home appliances, or devices below 30VDC

Applications

Product show

Outline dimensions

Resources & Services

WIKI: www.waveshare.com/wiki/Modbus_RTU_Relay

Package Content

Weight: 0.244 kg

The power supply of this product is not included, it is recommended to purchase 12V power supply if you need it.
It is also recommended to purchase USB TO RS232/485/TTL or USB TO RS485 at the same time for easy testing.

Modbus RTU Relay (B) x1