Modbus I/O Expansion Racks

Modbus is a protocol in the industrial manufacturing and environment monitoring fields. It suits master-slave or query-response distributed I/O applications. The units have pre-installed a Modbus firmware. PC's, HMI's or PLC's can use Modbus/TCP and Modbus/RTU protocol to communicate with I/O modules in the unit via the RS-232/485 or Ethernet interface.

Modbus Expansion I/O Racks Application Diagram

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