HEIDENHAIN MANUALplus 620 Technical Manual page 1769

9.5.2 RS-422/V.11 interface
Hardware
January 2012
The RS-422/V.11 serial interface is suitable for data transfer rates up to 10
Mbps.
The interface modules of the control can transfer data at up to 115 200 bps.
Transmission distance: over 1 kilometer
The interface works symmetrically, using two signal lines. At the receiver, the
difference in voltage of the two lines is evaluated.
Advantage:
Large transmission distances are possible
High data transfer rates
Physical connections:
9.5 The Serial Interface of the Control 1769