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Rayleigh Instruments RI-DMUX Modbus RTU Multiplexer - 2x Masters on Single Bus


  • Compact size - 2 module (35mm width) DIN Rail mounting
  • Supports 2 x RS-485 RTU Modbus Masters
  • Supported baud rates 9600, 19200, 38400, 57600, 115200
  • Master devices can share or have private devices
  • 1 x Digital Input
  • 5VDC/1.5A Auxiliary Supply
  • Compatible with rayleighconnect™ cloud system


The RI-DMUX is a Modbus RTU multiplexer that allows for two masters on a single RS-485 bus and forms part of a growing family of rayleighconnect™ products.

Requests from two Modbus RTU masters are queued and forwarded to Modbus RTU slave devices ensuring no data transmission conflicts. Once a response is received it is sent to the master that sent the request.

The second master does not receive the requests or responses initiated by the first master.

Two Modbus RTU RS-485 Masters on a Single Bus


Additional Information

Manufacturer Rayleigh Instruments
Product Name / Options Price (ex VAT)
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