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Industrial Modbus RTU Relay Module Review

3

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Very good

Revainrating 4.5 out of 5  
Rating 
4.7
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Description of Industrial Modbus RTU Relay Module

Industrial Modbus RTU 8-ch Relay Module, RS485 Bus, Communication interface: RS485. Communication protocol: Standard Modbus RTU protocol. Configurable device address (1~255), multi devices can be cascaded on RS485 bus. Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal. Onboard unibody ADI magnetical isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption. Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightning-proof & anti-electrostatic. Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit. 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.

Reviews

Global ratings 3
  • 5
    2
  • 4
    1
  • 3
    0
  • 2
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  • 1
    0

Type of review

Revainrating 5 out of 5

Outside modbust timing

You can force the relay to switch but if you expect something to be read from this device you have to ignore the 3.5 character response time, since this device is responsible for 1 character time. Waveshare support is useless.

Pros
  • Electronics
Cons
  • I don't remember but there was something

Revainrating 4 out of 5

Very good Modbus RTU relay with a nice surprise.

This is a really good 8 channel Mobus RTU relay. Everything works as I expected. It responds to Modbus read and write coil commands and has non-standard coil switching code. It uses register 4000 hex to set the slave address. DIN rail and thru hole mounting options, it's much more professional than an exposed PCB and costs a few bucks more to have protection and DIN rail mounting. It has a status LED that flashes when the device is working, as well as transmit and receive LEDs. It comes with a…

Pros
  • Configurable device address (1~255), multiple devices can be cascaded on the RS485 bus
Cons
  • High price

Revainrating 5 out of 5

Does not meet Modbust timing requirements

You can force the relay to switch, but if you expect to read something from this device, you must ignore the minimum response time of 3.5 characters, since this device is responsible for 1 character. Waveshare support is useless.

Pros
  • Solid onboard power supply isolation, provides stable isolated voltage, requires no additional power supply for the isolated port. Built-in magnetic unibody ADI isolation ensures signal isolation, high reliability, strong anti-interference and low power consumption.
Cons
  • Something is wrong