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DelcomRF Modbus RTU IO Module DRF440R

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DelcomRF Modbus RTU IO Module DRF440R

DelcomRF Modbus RTU IO Module DRF440R The great feature of the DRF440R series is that it can be used as master and slave at the same time. The unit, which works as a slave, can “control different slave units connected to the same line, or transmit data to the wireless modem on the line” by renewing its status via the RS485 port, if the master feature is activated “according to the user’s request”, if there is a status change in the input channels.

If there is no change in their status, it repeats the input status within the time specified by the user and sends “power failure, data refresh of other slave devices that have failed” via the RS485 port. Thus, you do not need to use an additional master unit for state change besides the

DelcomRF Modbus RTU IO Module DRF440R has 4 channels of optically isolated digital inputs and 4 channels of relay outputs. It works on Modbus RTU protocol. RS485 line connection can be used up to hundreds of meters. They are industrial type products. They work between -40 and +80 degrees.

DelcomRF Modbus RTU IO Modülü DRF440R


Wireless communication techniques are frequently used in automation systems and RF modems that can establish wireless communication are grouped under two options. Modems broadcasting in licensed and unlicensed bands are divided into two as those that communicate with each other in wide and narrow band frequencies. Please for your projects and questions from

For example, models that broadcast 12.5 Khz band with GFSK PSK QAM narrowband communication and broadcast in 125/250/500 Khz broadband spectrum using LoRa protocol. DelcomRF Modbus RTU IO Module DRF440R

CLICK for narrow band licensed or unlicensed band transparent modem options!

CLICK for Unlicensed Band Radio Modems

CLICK for G4 CAT4 Router with industrial serial port output!

Modbus Protocol:

It is a server/client based protocol developed by Modicon company in 1979 to work with PLCs and is one of the most used protocols in the industrial environment. Among the biggest reasons why it is preferred is that it is easy to use and a free protocol. With its ease of use and reliable protocol structure, billions of devices communicate with this protocol today…