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Chapter 4: Appendices – RS-485/422 Interface 4-13

Titan/cPCI User’s Manual, ver. 0.00

RS-485/422 Cable Wiring

You can wire Titan/cPCI adapters in various ways to

communicate with RS-485/422 peripherals. This section

describes a few examples of RS-485/422 cabling schemes.

Figure 5 describes a 4 wire cabling scheme between a port on the

Titan/cPCI adapter to a port on the RS-485/422 peripheral.

Figure 5: RS-485/422 wiring diagram (4 wire)

RTS +

RTS -

CTS +

CTS -

TxD +

TxD -

RxD +

RxD -

RxD +

TxD +

RxD -

TxD -

RTS -

CTS -

RTS +

CTS +

Titan/cPCI adapter

RS-485 peripheral

Technical Tip

The RS-485/422 electrical interface consists of a differential

signaling scheme. You should always connect the signals with

twisted pairs

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