HEIDENHAIN iTNC 530 Service Manual page 555

Expansion boards with metallic isolation are recognized
as follows:
On the front panel there are the LEDs RESET X1, READY
and RESET X2.
There is a grounding screw on the front panel.
There is transformer on the front panel.
These boards have the ID 324952-10 with index A, -11,
-12, ...
Transformer
component on the
board
July 2010 28 – 555