11. Turning the Power ON/OFF
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(2) When the control unit and the display unit use each different power supply
DCIN
DCOUT
ON/OFF
PD25
CF24
ACIN
NFB
NFB
G171
G013
24Vdc
Power Supply
ACIN
RA
DCIN
DCOUT
CF01
ON/OFF
ON
G170
OFF
RA
Display unit
Control unit
(a)
(b)
(c)
(a’)
(a) The switch is turned OFF
(b) A signal is input from the OFF switch through the G170 cable, which starts a shutdown process.
After the completion of the shutdown process, the OFF signal is sent to PD25 through G171 cable.
(c) PD25 stops outputting the voltage.
Relays operate to turn OFF the other power source. Both display and control units are turned OFF.
(a)’ To stop the NC operations at the same time of switching OFF the display unit (in order to keep the axis
position during the shutdown process, for example), the control unit also needs to be turned OFF.