HEIDENHAIN TNC 407 (243 020) Service Manual - Manual (Page 48)

31-O
SERVICE MANUAL TNC
Issue: 01.09.1995
Page 41
8.6.2 Connection Schematic of the PLC Power
internal
The PLC outputs 00 to 023 are supplied via 1 can be switched off) and can be reset by an
external emergency stop.
The PLC outputs 024 to 030 are supplied via
2 cannot be switched off) and
cannot
be reset
by an external emergency stop.
However, all PLC outputs can be reset by an internal emergency stop (e.g. GROSS POSITIONING ERROR
<AXIS>
(The voltage at
2 must be connected, as it is used for the internal power supply of the PLC board and
the graphics board.)