HEIDENHAIN iTNC 530 Service Manual page 277

D-sub adapter connector 25-pin
To test the data transfer lines
display by LEDs
D-sub adapter connector
25-pin
To cross the data transfer lines
D-sub adapter connector
Adaptation of 25-pin connector to 9-pin connector
Background:
The adapter block RS 232 on the switch cabinet mostly has a 25-pin
connector, the COM interface on the laptop mostly has a 9-pin
connector.
May 2006 16 – 277