HEIDENHAIN TNC 407 (243 020) Service Manual - Manual (Page 68)

31-O
SERVICE MANUAL TNC
Issue:
01.09.19958
Page 57
14.3.2 Wiring Diagram and Adaptor of the RS 422 Data Interface
RS 422 Adaptor Block max. 100 X22 Data Interface
RS 422
249 819 01 250 478
1 GND CHASSIS
2 RXD
3 CTS
4 TXD
RTS
6 DSR
7 DTR
a
SIGNAL
9
1 3
1 4 D T R
15
Advantage of the 422 data interface:
If a Baud rate of
38 400 has been selected with the RS 422 interface, data transfer over a cable length of
1 km is possible.
The pin assignment of the RS 422 is the same at the logic unit X22 and at the adaptor block RS 422