Selecting The Power Supply Unit - Festo CPX System Manual

3. Installation

3.1.4 Selecting the power supply unit

3−8
Warning
Use only PELV circuits as per IEC/DIN EN 60204−1 for the
·
electric power supply (protective extra−low voltage,
PELV).
Also observe the general requirements for PELV circuits
laid down in IEC/DIN EN 60204−1.
Use only power sources that guarantee reliable electri
·
cal isolation of the operating voltage as per
IEC/DIN EN 60204−1.
Protection against electric shock (protection against direct
and indirect contact) is guaranteed in accordance with
IEC/DIN EN 60204−1 by using PELV circuits (electrical equip
ment of machines, general requirements).
The current consumption of a CPX terminal depends on the
number and type of integrated modules and components.
Recommendation:
Use regulated power supply units, to ensure that the load
·
voltage of the outputs remains within the permitted toler
ances even during continuous operation.
Select power supply units that provide sufficient output
·
reserves for later extensions to the CPX terminal.
Note
When selecting the power supply units, check that they
have sufficient output. If necessary, ascertain the current
consumption according to the following tables.
Festo P.BE−CPX−SYS−EN en 0902e