8 – 12 HEIDENHAIN Technical Manual TNC 426, TNC 430
8.2.3 RS-422/V.11 Interface
RS-422/V.11 is a standard serial interface.
It is suitable for data transfer rates up to 10 Mbps.
The interface module of the TNC can transmit data at up to 115 200 bps.
Transmission distance: over 1 kilometer
Hardware The interface works symmetrically, using two signal lines. At the receiver, the
difference in voltage of the two lines is evaluated.
Advantage:
n Longer lines can be used
n Higher data transfer rate
Physical connections:
Transmission length
Receiver
Transmitter
RxD
TxD
RxD
TxD
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