Festo CDVI-DN Manual page 37

1. Installation
Festo P.BE-CDVI-DN-EN en 0805a
Warning
If the valve terminal is supplied with load voltage via an
output of a "safety I/O module", switch-on test pulses of
the "safety I/O module" may cause unexpected reactions
of the valve terminal.
Make sure any switch-on test pulses are reliably sup-
•
pressed or switched off.
Observe the following for the connection of the 24 V load
voltage (pin 2):
Observe the tolerance (21.6 V ... 26.4 V DC).
•
Check the 24 V load voltage of the valves while
the system is in operation.
Caution
Excessive voltages or short circuits can cause functional
damage on the CP..-SC-DN, whereby actuators can no
longer be controlled.
Protect the load voltage of the solenoid coils with
•
external fuses.
To ascertain the amperage of the fuses, first calculate
the maximum current consumption in accordance with
section 1.4.1.
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