Modbus MFU Option Card Installation Manual
8 of 64 Publication PUB091-004-00_0918
1.1 General
The Modbus Module has three variants:
Single RS-485 highway
Dual Independent isolated RS-485 highways
Single RS-485 highway with inbuilt isolating repeater
Communication Medium RS-485 2-wire highway (single or dual), half duplex
Protocol Modbus RTU
Mode Master/Slave; module is a slave.