Festo Compact Performance Series, Programming And Diagnosis

Page: 27 / 58

1.6 Connecting the operating voltage
WARNING
Use only power units which guarantee reliable elec-
trical isolation of the operating voltages as per
IEC 742/EN 60742/VDE 0551 with at least 4 kV
isolation resistance (protected extra low voltage,
PELV). Switch power packs are permitted if they
guarantee reliable isolation as per EN 60950/
VDE 0805.
Remark:
By using PELV power units, protection against electric
shock (protection against direct and indirect contact) in
accordance with EN 60204-1/IEC 204 is guaranteed on
Festo valve terminals.
Safety transformers with the adjacent designation must
be used for supplying PELV networks. The valve termi-
nals must be earthed in order to ensure their function
(e.g. EMC).
Information on this procedure as well as the connecting
cables and current consumption can be found in the
manual "CP system, installation and commissioning".
1. Installation
CP FB8-E 9809a
1-15