10 Operation
Operation of the valve
© Moog GmbH User Manual "D633-A Series" (CA80942-001; Version 1.0, 12/08) 53
10.2 Operation of the valve
Operation of the valve:
Via command signal from
the machine controller
The valve is controlled via the command signal which it receives from the ma-
chine controller.
Direct interventions by the user on the valve during normal operation are
not necessary.
The valve has no controls, such as e.g., switches or buttons, which must be ac-
tuated.
Information on maintenance:
Chapter "11.2 Maintenance", page 58
Information on correcting possible faults:
Chapter "11.3 Troubleshooting", page 59
10.3 Shutting down the valve
Safety instructions:
Shutting down the valve
Shutting down the valve
The valve can be shut down by switching off the command signal.
If necessary, the valve can be restarted by switching on the command signal.
Chapter "3.2.2 Restarting the valve", page 15
DANGER
Hydraulic pressure and electrical supply voltage are still
normally applied after the valve has been shut down. The
machine is not automatically put out of operation when
the valve is shut down.
During operation, do not carry out any work, such as e.g.,
mounting or removal, electrical or hydraulic connection,
troubleshooting or servicing, on the valves or the ma-
chine.
Failure to comply with this requirement results in danger due
to:
• Hydraulic fluid squirting out under pressure
• Uncontrolled sequences of motions
• Destruction
• Malfunction
Before working on the valves or the machine, shut down
and switch off the machine without fail and de-energize
and depressurize the machine.
For this purpose, switch off the command signal of the valves
as well as the supply voltage of the connected peripherals,
such as e.g., externally powered transducers or programming
units.
Secure the machine without fail against restarting.
Examples of suitable securing measures:
• Lock the main command device and remove the key
• Attach a warning sign to the master switch
