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Industrial Modbus RTU 8-ch Relay Module with RS485 Interface

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Industrial Modbus RTU 8-ch Relay Module with RS485 Interface

SKU: WS-25739 Brand: Waveshare

Industrial Modbus RTU 8-ch Relay Module with RS485 Interface, Multi Isolation Protection Circuits, 5V Power Supply...

$50.45 AUD, inc GST

$45.86 AUD, exc GST

In stock, ships same business day if ordered before 2PM
Delivered by Tue, 19th of Nov

Quantity Discounts:

6-12 $44.49 (exc GST)
12+ $43.57 (exc GST)

Details

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

RS485 8-ch Relay Module (B)

Modbus RTU Protocol, Multi Isolation Protection Circuits, Safe & Stable & Reliable

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

* Resources for different product may vary, please check the wiki page to confirm the actually provided resources.

Selection Guide

product	Modbus POE ETH Relay	Modbus POE ETH Relay (B)	Modbus POE ETH Relay 30CH	Modbus RTU Relay	Modbus RTU Relay (B)	Modbus RTU Relay (D)	Modbus RTU Relay 16CH	Modbus RTU Relay 32CH

Communication parameters
Communication interface	Ethernet port (PoE support)			RS485 port
Baud rate	-			4800,9600,19200,38400,57600,115200,128000,256000 (configurable)
Default communication format	-			9600, N, 8, 1
Communications protocol	TCP/UDP/MQTT			RS485 protocol
Modbus protocol	Modbus RTU Protocol or Modbus TCP Protocol			Modbus RTU Protocol
Device address	Unconfigurable, identify the devices by IP address			1~255 (configurable, supports cascading multiple devices)
control interface
Output control (DO)	8-ch relay		30-ch relay	8-ch relay			16-ch relay	32-ch relay
Contact form	1NO 1NC
Contact rating	=10A 250VAC/30VDC
DIGITAL INPUT	-	8DI, 5~36V, passive / active input (NPN or PNP), built-in bi-directional optocoupler isolation	-			8DI, 5~36V, passive / active input (NPN or PNP), built-in bi-directional optocoupler isolation	-
Others
Power Supply	PoE port, DC 5.5*2.1 power port, or screw terminal			DC 5.5*2.1 power port, or screw terminal
Power range	7~36V wide range			5V	7~36V wide range		5V	7~36V wide range
Dimensions	145×90×40mm	175×90×40mm	300×110×60mm	145×90×40mm		175×90×40mm	200×110×60mm	300×110×60mm
Installation	Standard DIN 35mm rail mounting, wall mounting

Weight: 0.244 kg

Quick Overview

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

This product is listed in:

Breakouts & Modules>RS485

Product Comments

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Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

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