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
(The voltage at
2 must be connected, as it is used for the internal power supply of the PLC board and
the graphics board.)