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Wire rs-485 connection – B&B Electronics 3PCIOU4 - Manual User Manual

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RS-422/485 Connections/Operation

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Chapter 8

Document Number 3PCI-0712m

4-Wire RS-485 Connection

In a 4-wire RS-485 system, each receive line connects to the same receive terminal on
all slaves, and each transmit line connects to the same transmit terminal on all slaves.
The master to the first slave is connected as above.

Figure 22. 4-Wire RS-422 or RS-485 Connections

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