Festo
CPVASI4E3AZ
2018-11c English
9
3.5 Connecting the AS-interface bus and the load voltage
Note
The sensor supply derived from the ASInterface power
supply is protected against short circuits and overload.
It must
not
be connected to other voltages (for example
common ground).
The valves must be supplied separately with 24 V via
the load voltage connection.
The AS-interface has an integrated watchdog function
which resets the outputs if there is a bus communica
tion failure.
Warning
S
Use only PELV (protective extra-low voltage) circuits
as per EN 60204-1 for the electric power supply.
S
Also observe the general requirements for PELV
power circuits as per EN 60204-1.
S
Only use power sources which guarantee reliable
electrical isolation of the operating voltage as per
EN 60204-1.
By the use of PELV circuits, protection against electric
shock (protection against direct and indirect contact) is
guaranteed in accordance with EN 60204-1.
