Main Contactor And Safety Relay - HEIDENHAIN TNC 410 M Technical Manual

5.3.3 Main Contactor and Safety Relay

X70: Main
contactor X71:
Safety relay for
spindle
X72: Safety relay
for axes
5 – 44
For information on the wiring and function, see the Basic Circuit Diagram for
your control.
Connecting
terminals
X70 to X72
1
2
3
a
4
a
5
a. Max. 125 V
Warning
A recovery diode is required in the proximity of inductive loads, e.g. relay or
contactor coils.
HEIDENHAIN Technical Manual for Inverter Systems and Motors
Assignment
+24 V output (max. 250 mA)
24 V input for U ON, Axis ON, Spindle ON
Z
Not assigned
Normally closed contact 1
Normally closed contact 2