HEIDENHAIN TNC 370D - Manual (Page 17)

3–14 TNC 370 D Mounting and Electrical Installation July 02
3.7.4 Reference Signal for the Spindle
Usually, the reference mark of the spindle encoder is evaluated as a reference signal for the spindle.
In special cases, a 24 V signal on terminal X30 can be evaluated as a reference signal for the spindle
or as a reference signal release (see chapter “Spindle”). For reliable evaluation, the signal must last
for at least 3 milliseconds.
X30 Spindle Reference Signal
Terminal Assignment
1 +24 V input
2 0 V
3.7.5 Supply voltage for Control-is-Ready Signal
The power supply for the control-is-ready signal is taken from the 24 V power supply of the PLC.
X34 power supply for control-is-ready signal
Connecting terminal Assignment
1 +24 V PLC
2 0 V