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Modbus MFU Option Card Installation Manual
1.1 General
The Modbus Module has three variants:
Single RS-485 highway plus one analogue input channel
Dual Independent isolated RS-485 highways
Single RS-485 highway with inbuilt isolating repeater
Communication Medium
Protocol
Mode
Fig 2:
8 of 76
RS4-85 2-wire highway (single or dual), half duplex
Modbus RTU
Master/Slave, module is a slave
RS485
Highway
Analogue
Input
Single Highway + Analogue Input
RS485
Highway 1
RS485
Highway 2
Dual Highway
RS485
Highway 1
RS485
Highway 1
Single Highway + Repeater
The Types of Modbus Module Mk2 Option Card
Publication PUB091-003-00_0119
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