Festo MPA-ASI Series, Manual

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4. Commissioning
4−4
Festo P.BE−MPA−EN en 0802c
4.1 General instructions
4.1.1 Before commissioning
·
Switch off the power supply before connecting or
disconnecting plugs (otherwise this could lead to
functional damage).
·
Commission only a valve terminal which has been fitted
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 valve coils are constantly under stress.
·
Please observe the following instructions on building up
pressure in the complete supply.
4.1.2 Pressure increase in the complete supply
Warning
If the build−up in pressure of the auxiliary pilot air is too
slow or delayed, this may cause the actuators to perform
sudden unexpected movements under the following
conditions:
when the compressed air is switched on with a safety
start−up valve (slow build up of pressure) and
if there are electric signals (e.g. after EMERGENCY STOP).
This can cause damage to the machine or system and even
injury to human beings.
·
Operate the valve terminal with external pilot air
(3
Ū
8bar). Branch the pilot air in front of the safety
start−up valve (see diagram).