Advantech PCA-6143P User Manual page 23

Pin Signal
1 TX- –
4 RX- –
2 TX+ –
3 RX+ –
5 GND
The following figure shows the circuits for the card's RS-422 and
RS-485 driver and receiver.
Now that you have made all the required external connections, you
can close up your chassis (as described in Chapter 2). If you are
installing any other cards, do it now. You can then power up your
system as described in the next chapter.
Pin Signal
– 1 TX-
– 4 RX-
– 2 TX+
– 3 RX+
5 GND
Driver and receiver circuit
Chapter 3 Connecting peripherals 23