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PCI VelocityRS232/422/485
CTS 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 5-1. Serial Port 1 To Other PC Cable.
SERIAL PORT 1 Side
9 Pin Female D Connector
Additional RS422/485 Operation
Other PC SERIAL PORT Side.
9 Pin Female D Connector
Chapter 5 Page 73
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