Selecting The Power Unit - Festo CPV GE-CO2-8 Series Electronic Manual

1. Installation

1.5.2 Selecting the power unit

1-30
Warning
Use only power units which guarantee reliable 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, provid-
ing 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 guar-
anteed with the Festo valve terminals in accordance with
EN 60204-1/IEC 204. Safety transformers with the adjacent
symbol must be used for supplying PELV networks. The valve
terminals must be earthed to ensure that they function cor-
rectly (e.g. EMC).
The current consumption of a CP system depends on the
number of CP modules and valve coils. Recommendation:
S
Used closed-loop power units.
S
When selecting the power units, check that they have
sufficient output. If required, ascertain here the total
current consumption according to the following table.
Festo P.BE-CP-CO2-EN en 0107NH