HEIDENHAIN TNC 306 Technical Manual - Manual (Page 172)

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TNC 406/TNC 306 5 EMERGENCY STOP routine 3/97
5.1 Connection diagram
Under fault conditions, the "control operational" output should switch off the 24-volt supply. Because
of the enormous importance of this function this output is tested by the control every time the
power is switched on.
This diagram represents a proposal for circuitry. The machine tool builder is responsible for
complying with applicable safety regulations.
+ -
Logic unit
Switch opens briefly when the control voltage
of each microprocessor is switched on
X41/34 X44/2 X44/1 X42/4
X21/34 X24/2 X24/1 X22/4
"Control is
ready"
24V not
interruptible 24V
interruptible "Control ready"
feedback
EMERGENCY
STOP
buttons
Control
voltage
on
k1
k1
K1
24 V
PLC
LE406
LE360