General Notes On Connecting The Tubing - Festo VTSA-44-MP Series Manual

3. Installation
3.2

General notes on connecting the tubing

Back pressure
Festo P.BE-VTSA-44-EN en 1101f
Warning
Uncontrolled movements of the connected actuators and
loose tubing can cause injury to persons and/or damage
to property.
Before carrying out mounting, installation and mainten-
ance work, switch off the following:
– compressed air supply
– operating and load voltage supplies.
Note
Observe the following if the UL requirements are to be
complied with in your application:
– Rules for observing the UL certification can be found in
the separate UL-specific documentation. The relevant
technical specifications listed there also apply here.
– The technical data in this documentation may show
values deviating from this.
Pay attention to the following:
The components of the valve terminal contain electrostatically
sensitive components. The components will be damaged if
you touch the contact surfaces of the plug connectors or if
you do not observe the handling specifications for electro-
statically sensitive devices.
When exhausting large volume actuators or if the exhaust
performance is too small, back pressures can build up in the
valve terminal exhaust ducts. The back pressures can lead
to pneumatic actuation of other valves, especially with un-
switched 3/2-way valves that are normally closed.
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