Festo CPA-SC Series, Manual

Page: 79 / 140

3. Installation
3−25
Festo P.BE−CPASC−EN en 0808c
3.3.5 Connecting the electric cables
Warning
·
In order to provide the electric power supply, use only
PELV
circuits as per IEC/DIN EN 60204−1 (Protective
Extra−Low Voltage, PELV).
Take into account also the general requirements for
PELV circuits as per IEC/DIN EN 60204−1.
·
Use only power packs which guarantee reliable
electrical isolation of the operating voltage as per
IEC/DIN EN60204−1.
By the use of PELV power units, protection against electric
shock (protection against direct and indirect contact) is
guaranteed in accordance with IEC/DIN EN 60204−1
(electrical equipment of machines, general requirements).
Note
Check within the framework of your EMERGENCY STOP
circuit, to ascertain the measures necessary for putting
your machine/system into a safe state in the event of an
EMERGENCY STOP (e.g. switching off the operating voltage
for the valves and output modules, switching off the com
pressed air).
Caution
Long signal cables reduce the immunity to interference.
Do not exceed the maximum permitted signal cable length
of 10 m.