Earthing Plan - HEIDENHAIN TNC 415 Technical Manual

4.3 Earthing plan

LE - Power supply
VDE 0551
1
+24V-
0V
Selectable
connection
Emergency stop
controlled
PLC - Power-
supply
VDE 0550
3
+24V-
0V
*) In order to avoid an earth circuit, the measuring voltage should not be grounded. If it must be
grounded, ensure that the ground line is short and noise immune.
3-20 TNC 407/TNC 415/TNC 425
Unit LE
+5V
Insulated
0V
+24V- SI
1 stab. supply
X31
voltages
0V 0V
2
Power supply
Measuring voltage
*)
X23
1
2
Optoc.
X14
X13
X12
X11
X10
X9
X8 X7 X7 X8 X8 X3-X6
4 Power supply
Machine Encoders
1 2 3
X1 X2 X3
PT 100
Unit PL 410B
X1
X2
to 2nd PL
2
6mm
2
6mm
B
2
6mm
2
6mm
4 5 6
X4 X5 X6
X47
+24V- +24V- 0V
1
0
01.98