Applying The 24 V Operating Voltage - Festo VIFB-02- Series Manual

VIFB1 – 02
> IFB1-02_BES_V_018474g1_1996-04N - Restored Document - 2011-12-15 <
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4. Installation
The following components of the valve termi-
nal/valve sensor terminal are supplied separately
with +24 V DC via this connection:
• electronic components and/or inputs
(tolerance: ± 25 %)
• outputs (tolerance: ± 10 %)
PLEASE NOTE
The electronic components and inputs show
a greater tolerance range of the 24 V opera-
ting voltage than the outputs. Under certain
circumstances this can cause the electronic
components to indicate the switching status
of the outputs, although the latter are not in
the switched position (operating voltage of
the outputs outside tolerance range).
The 24 V operating voltage of the outputs should
be tested whilst the system is operating. Please
see that the operating voltage of the outputs is
within the permitted tolerances even during full
operation.

Applying the 24 V operating voltage

PLEASE NOTE
Please observe the polarity when the opera-
ting voltage is applied.
The following diagram shows the pin assignment
of the operating voltage connection. A suitable
24 V supply should be connected via the mains
connection socket (see Chapter 3, Technical
specifications).
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