July 2010 13 – 201
13.7.2 RS-232-C (V.24)
Some possible combinations are:
The RS-232-C has different pin layouts at the iTNC 530 (connector X27, X127) and at the
RS-232-C adapter block (D-sub connector on electrical cabinet).
Exception: The cable with the ID 366964-xx may be connected to the 9-pin adapter block or
directly to the control.
You find detailed information on cables and cable layouts for serial data transfer in the help
menu of TNCremoNT under the catchword "Cable assembly".
For data transfer via RS-232-C or RS-422 HEIDENHAIN recommends using an "Opto
Bridge".
This serial adapter connector ensures metallic isolation via optocoupler and can thus protect
the serial interface against overvoltage, different load potentials and interference voltages
on the ground lines.
"Opto Bridges" are available in specialized computer stores.
Please note:
If the machine manufacturer has already mounted an "Opto Bridge", a further opto bridge
will not function, as such components must be powered from both sides!
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