Rs422 Serial Port Cables - Brainboxes CC-310 Hardware Manual

PCI VELOCITY / OPTO ISO RS422/485
handshake inwards. There is no need to carry the ground from one
device to another.
This RS422 arrangement allows data to be transmitted and
received simultaneously since each signal has its own data cable
pair. In addition, the receiver can set RTS true so telling the
transmitter on its CTS input that the receiver is ready to accept data.
In this way, no data will ever be transmitted when the receiver is
unable to accept it, due to a full input buffer etc. And so no data
will be lost.

RS422 Serial Port Cables.

Use screened twisted pair Belden cable 9729 and 9829, L
type 2493 and 2919 or IBM Part No 4716748 cable to make the
RS422 connection. Unscreened Belden type 8795 may also be used
in less noisy environments.
The on board resistor networks terminate the receiving end
of the twisted pair cable in its characteristic impedance.
Figure 4-1. Serial Port 1 To Other PC Cable.
RS422/485 Information
Chapter 4 Page 43