General Information; Before Commissioning; Pressure Build−Up In The Overall Supply - Festo VTSA Series Description

4. Commissioning
4.1

General information

4.1.1 Before commissioning

4.1.2 Pressure build−up in the overall supply
4−4
Switch off the power supply before connecting or discon
·
necting plugs (otherwise this could lead to functional
damage).
Only commission a valve terminal that has been mounted
·
and wired completely.
Make sure that there is a sufficient supply of fresh air
·
(cooling) for the following operating conditions:
When the maximum number of valves are fitted
When the maximum operating voltage is applied
When the solenoid coils are constantly under stress
Please observe the following instructions on building up
·
pressure in the overall supply.
Warning
If the build−up of pilot air is too slow or delayed, this may
lead to sudden unexpected movements of the actuators
under the following conditions:
When the compressed air is switched on via a soft−start
valve
If there are electric signals (e.g. after EMERGENCY STOP)
This can cause damage to the machine or system and even
injury to persons.
Operate the valve terminal with external pilot air accord
·
ing to the pressure specified in Appendix A, Tab. A/6.
The pilot air must be branched in front of the soft−start
valve (see figure).
Festo P.BE−VTSA−44−EN en 0905e