Festo CDVI-DN Manual page 40

1. Installation
1-28
Connection with galvanic isolation of operating and
load voltage:
2
1
0 V
24 V
3
0 V
24 V
2
1
Power supply unit for load voltage (valves and outputs)
2
Isolation monitoring device
3
Power supply unit for operating voltage (electronics
and sensors)
Fig. 1/10: Connection example for power supply with two
PELV power supply units
Note
Galvanic isolation will no longer be possible if you loop
the voltage through to further I/O modules without
galvanic isolation.
3 4 1 2
Festo P.BE-CDVI-DN-EN en 0805a