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24 RS-232/RS-485/422 Option

Xtreme/104 Opto User's Manual, ver. 0.00

RS-485/422 Cable Wiring

Figure 2 describes a 4 wire cabling scheme between a port on the

Xtreme/104 Opto adapter to a port on the RS-485/422 peripheral.

Figure 2: RS-485/422 wiring diagram (4 wire)

RTS +

RTS -

CTS +

CTS -

TxD +

TxD -

RxD +

RxD -

RxD +

TxD +

RxD -

TxD -

RTS -

CTS -

RTS +

CTS +

Xtreme/104 Opto adapter

RS-485/422 peripheral

Figure 3 describes a 2 wire cabling scheme between a port on the

Xtreme/104 Opto adapter to a port on the RS-485/422 peripheral.

Figure 3: RS-485/422 wiring diagram (2 wire)

RTS +

RTS -

CTS +

CTS -

TxD +

TxD -

RxD +

RxD -

RxD +

TxD +

RxD -

TxD -

RTS -

CTS -

RTS +

CTS +

Xtreme/104 Opto adapter

RS-485/422 peripheral

Technical Tips:

1. The RS-485/422 electrical interface consists of a

differential signaling scheme. You should always connect

the signals with twisted pairs.

2. Signal reference must be connected.

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