Festo Compact performance CPA ASI−8E8A−Z Manual Del Usuario página 25

3.6 Connecting the AS−Interface bus and the load voltage
Please note
The sensor power supply for the inputs is provided via
the AS−Interface bus.
The power supply for the valves (outputs) is provided
by the additional supply: The valves must be supplied
separately with 24 V via the load voltage connection.
Warning
Use only power units which guarantee reliable electrical
isolation of the operating voltages as per IEC 742/
EN 60742/VDE 0551 with at least 4 kV isolation resis
tance (Protected Extra Low Voltage PELV). Switch power
packs are permitted, providing they guarantee reliable
isolation in accordance with EN 60950/VDE 0805.
Please note:
By the use of PELV power units, protection against electric
shock (protection against direct and indirect contact) is
guaranteed in accordance with EN 60204−1/IEC 204.
Safety transformers with the adjacent symbol must be
used for supplying PELV networks.
Festo CPA..−ASI−8E8A−Z 0303NH English 25