13 – 182 HEIDENHAIN Service Manual iTNC 530
13.2.2 Via serial interface RS-232-C or RS-422
Requirements A laptop/PC with a RS-232-C or RS-422 interface or a USB interface (for connection of a USB/
RS-232-C adapter).
A crossed serial data transfer cable ("null-modem cable") for the connection of laptop and
D-sub connector on the electrical cabinet (HEIDENHAIN adapter block).
Possible configurations, also for direct connection of the laptop to the iTNC 530. -->
See “Cable Overview” on page 13 – 200.
An "opto bridge".
Managing the serial
data interfaces on
the iTNC 530
Use the connector for HeROS!
Connection setup
8 Connect your laptop to the adapter connector RS-232-C or RS-422 of the electrical cabinet with
a crossed serial data transfer cable (and possibly an opto bridge).
8 Now configure the serial interface on the iTNC 530.
Do not use self-made cables (shielding problems, contact problems, short circuits, etc.).
Mark your cable as "crossed" or "non-crossed"!
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!
Data interface Connector
Single-processor
software
Dual-processor software
RS-232-C (V.24) X27 for HeROS X27 for Windows
X127 for HeROS
RS-422 (V.11) X28 for HeROS X28 for Windows
X128 for HeROS
Usually, the machine tool builder mounts the HEIDENHAIN adapter connector RS-232-C or
RS-422 to a electrical cabinet wall.
If this is not the case, note that mostly you must use a different data transfer cable for direct
connection of the iTNC 530. --> See “Cable Overview” on page 13 – 200.
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