Modbus / Modbus - Converter
Modbus Splitter


The HD67146-A1 is a Modbus Master / Modbus MultiSlave Converter. It allows you to interface several Modbus slave devices with two Modbus Masters simultaneously.

HD67146-A1 Modbus Converter Diagram

This converter acts as a splitter, allowing both Masters to query the same Modbus slaves without creating conflicts on the bus. Furthermore, it provides electrical isolation between the Modbus sides.

Internally, the converter can be configured with a filter that defines which Modbus slave nodes are accessible to each connected Modbus Master.

Communication Interfaces

  • HD67146-A1: 2 x RS485 ports + 1 x RS232 port
  • HD67146-485-A1: 3 x RS485 ports

The HD67147-A1 is a Modbus Slave / Modbus Slave Converter, It allows you to interface two Modbus RTU Masters.


The HD67157-A1 is a Modbus TCP Slave / Modbus TCP Slave Converter, It allows you to interface two Modbus TCP Masters.

Modbus Communication Diagram
Order Code Details Description User manual
HD67146-485-A1 View Modbus Master / Modbus MultiSlave 3xRS485 - Converter ( Possibility to connect two Modbus Masters to one/more slaves ) ( Housing type: A, Terminal Blocks Connectors )
HD67146-A1 View Modbus Master / Modbus MultiSlave - Converter ( Possibility to connect two Modbus Masters to one/more slaves ) ( Housing type: A, Terminal Blocks Connectors )
HD67147-A1 View Modbus Slave / Modbus Slave - Converter
( Housing type: A, Terminal Blocks Connectors )
HD67157-A1 View Modbus TCP Slave / Modbus TCP Slave - Converter
( Housing type: A, Terminal Blocks Connectors )