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

:MRE03053
€28.37

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.

Quantity

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

*Disclaimer: The images are merely illustrative.

Modbus-RTU-Relay-B-details-1.jpg
 

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.

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

  2. 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

  3. Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal

  4. Onboard unibody magnetical isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption

  5. 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

  6. Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit

  7. Adopts dedicated relay driver chip, with built-in flyback diode protection, for stronger and more stable driving ability

  8. Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection

  9. High quality relay, contact rating: ≤10A 250VAC/30VDC

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

  11. 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

Modbus-RTU-Relay-B-details-3.jpg
 

Enclosure Design

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

Modbus-RTU-Relay-B-details-5.jpg
 
 

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

Modbus-RTU-Relay-B-details-7.jpg

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

Modbus-RTU-Relay-B-details-9.jpg
 
 

Applications

Modbus-RTU-Relay-B-details-11.jpg
 
 

Product show

Modbus-RTU-Relay-B-details-13.jpg

Outline dimensions

Modbus-RTU-Relay-B-details-size.jpg
 

Resources & Services

WIKI: www.waveshare.com/wiki/Modbus_RTU_Relay

 

Package Content

Weight: 0.244 kg

Modbus RTU Relay (B) x1

Modbus-RTU-Relay-B-details-pack.jpg
MRE03053

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