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Titan/cPCI User’s Manual, Connect Tech Inc.

Revision 1.01 29

RS-422/485 Cable Wiring

You can wire Titan/cPCI adapters in various ways to communicate with RS-422/485

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

Figure 8 depicts a 4 wire cabling scheme between a port on the Titan/cPCI adapter to a port on

the RS-422/485 peripheral.

Figure 9: RS-422/485 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-422/485 electrical interface consists of a differential signaling

scheme. You should always connect the signals with twisted

pairs

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