Festo VTSA Series, Manual

Page: 87 / 166

3. Installation
3−27
Festo P.BE−VTSA−44−EN en 0601a
3.3.10 Connecting the electric cables
Warning
VTSA valve terminals with 24 V DC control voltage:
·
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.
VTSA valve terminals with 110 V AC control voltage:
·
Observe the valid safety regulations for working with
110 V AC control voltage.
·
Make sure that the earth connection of the valve
terminal is connected to the protective earth.
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).
Please 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).