1766 HEIDENHAIN Technical Manual MANUALplus 620
9.5 The Serial Interface of the Control
9.5.1 RS-232-C/V.24 interface
With RS-232-C/V.24, data transfer is executed asynchronously, with a start bit
before each character and one or two stop bits after each character.
Transmission distance: up to 20 m
Hardware The physical connection between two RS-232-C/V.24 interfaces is an
asymmetrical line, i.e. the common ground connection between transmitter
and receiver is used as a return wire.
Physical connections:
RxD
TxD
RxD
TxD
Transmission length
Transmitter
Receiver
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