Festo VTSA Series, Manual

Page: 77 / 166

3. Installation
3−17
Festo P.BE−VTSA−44−EN en 0601a
3.3.4 Reversibly operated VTSA valve terminal
With reversible operation of the VTSA valve terminal the
operating pressure is supplied via connections 3 and 5 and
the exhaust is vented via connection 1.
Operate a reversible VTSA valve terminal only with external
pilot air.
In the case of valve terminals with selector end plate the code
cover must be set as follows:
Setting 1 for ISO−conform operation of the valve terminal.
Setting 3 for operation of the valve terminal with pres
sureless channel 12 (e.g. operation with ducted pilot and
beathable exhaust air).
Please note
·
If the VTSA valve terminal is fitted with reversible
3/2−way valves (identifier T32
F −A, T32 N −A, T32 W −A), you
must operate the valve terminal only in setting 1 of the
code cover.
3.3.5 Operating the VTSA valve termiinal with reversible 2x3/2−way valves
Please note
If reversible 2x3/2−way valves (identifier T32 F −A, T32 N −A,
T32 W −A) are operated on the valve terminal with standard
2x3/2−way valves (identifier T32 C −A, T32 H −A, T32 U −A), you
must operate the reversible valves in a separate pres
sure zone.
Exception:
If the reversible 2x3/2−way valves are operated with
reversible pressure regulators (identifier R
5 ) (circuit dia
grams see appendix B Tab.B/2 and Tab.B/5), a separate
pressure zone is not required.