Connecting The Power Supply And The I/Os - Festo SPC11-POT-TLF System Manual

3. Installation

3.3.2 Connecting the power supply and the I/Os

Festo P.BE-SPC11-SYS-EN en 0205a
Warning
Use only power units which guarantee reliable electrical
isolation of the voltage supplies in accordance with
IEC 742/EN 60742/VDE 0551 with at least 4 kV isolation
resistance (Protected Extra-Low Voltage, PELV). Switch
power packs are permitted providing they guarantee reli-
able isolation in accordance with EN 60950/VDE 0805.
By using PELV power units, you can ensure protection with
the SPC11 against electric shock (protection against direct
and indirect contact) in accordance with EN 60204-1/IEC 204.
For supplying power to PELV networks, you should use safety
transformers with the symbol shown here. The SPC11 must
be earthed in order to guarantee the operation of certain
functions (e.g. EMC).
Caution
In order to avoid faults caused by electromagnetic in-
fluences:
S Connect the earth connection on the left-hand side of the
housing to the earth potential with low impedance (short
cable with large cross-sectional area).
S Use only the following original cables for connecting the
power supply and the inputs/outputs:
Original cables for connecting the power supply and the in-
puts/outputs:
Type designation
KMPV-SUB-D-15-5
KMPV-SUB-D-15-10
Cable length
5 m
10 m
3-21