HEIDENHAIN MANUALPLUS 620 - Page 270

270 HEIDENHAIN Technical Manual MANUALplus 620
X17/X18:
EMERGENCY STOP
on MB
Connectors X17 and X18 are electrically parallel.
With the MB 620T without FS, the EMERGENCY STOP must be wired exter-
nally in the EMERGENCY STOP chain as before. In the MB 620T without FS,
the connectors X17 and X18 do not support dual channel evaluation of the
EMERGENCY STOP button. These inputs must therefore not be used for eval-
uating EMERGENCY STOP!
With the MB 620T FS, the EMERGENCY STOP is evaluated by the control via
HSCI and has HEIDENHAIN standard wiring.
Emergency stop buttons are to be used only for emergency stop purposes.
Under normal operating conditions, a machine must not be switched off via
the emergency stop buttons. The proper functioning of all emergency stop
buttons must be tested annually by pressing these buttons.
Pin layout X18 on MB 620 FS (X17 without function):
X7: PLC outputs Pin layout:
Ampacity of the outputs: Maximum 150 mA per output
Connecting
terminals
Assignment
1 Power supply for emergency stop channel A (-TEST.A)
2 Emergency stop channel A
3 Power supply for emergency stop channel B (-TEST.B)
4 Emergency stop channel B
Connecting
terminals
Assignment
1 O0 (illumination for the NC Start key)
a
a. With standard wiring
2 O1 (illumination for the NC Stop key)
a
3 O2 (illumination for the Control voltage ON key)
a
4O3
5O4
6O5
7O6
8O7
9 +24 V NC (available here)
10 0 V NC (available here)