H1750M Modbus 24-bit Digital I/O Board


The H1750M Modbus digital I/O board contains twenty-four discrete digital input/output bits. The input or output direction of each digital bit is user-selectable and may be set individually or all at once.

The H1750M digital I/O boards provide a direct interface to industry standard mounting racks and solid-state relay I/O modules. Mounting racks such as the PB16 and G4PB24 can be controlled directly with the H1750M.

The status of the digital inputs and outputs is communicated to the host using either the Modbus RTU or DGH ASCII serial protocol using the jumper selectable RS232 or RS-485 serial interface.

Two versions of the H1750M are available. The H1750M-1 contains a 50-pin ribbon connector mounted on the bottom of the PC board. The H1750M-2 contains a male 50-pin ribbon connector mounted on the top of the PC board.

Download Datasheet

Download Manual

Modbus Register Map

Additional Information

Sensor Type

Digital I/O



RS-232 Only, RS-485 Only

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