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

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

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.

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 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

• 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

Relay Connection

Contact Rating Of The Onboard Relay Up To 10A 250VAC/30VDC

Directly Controlling 220VAC Home Appliances, Or Devices Below 30VDC

Dimensions