Instruction Manual

3. Installation
3−16
Festo P.BE−CPX−SYS−EN en 0902e
Internal voltage forwarding
The operating voltage supplied (internal electronics/inputs)
and load voltage (valves/outputs) are forwarded in the inter
linking blocks via what are known as contact rails. Fig.3/2
and Fig.3/3 show the differences between 4−pin and 5−pin
alternative connections:
1
2
3
4
CPX−GE−EV−S CPX−GE−EV
CPX−GE−EV−Z
CPX−GE−EV−V
5
0 V
val
24 V
val
0 V
OUT
24 V
OUT
0 V
el/sen
24 V
el/sen
FE
0 V
val
24 V
val
0 V
OUT
24 V
OUT
6
1 Load voltage for valves (24 V
val
and
0 V
val
)
2 Load voltage for digital outputs
(24 V
out
and 0 V
out
)
3 Operating voltage for electronics and
sensors (24 V
el/sen
and 0 V
el/sen
)
4 Functional earth (FE)
5 Rails for internal functions
6 Connection to FE connection on end
plate
Fig.3/2: Basic representation of the power supply concept for interlinking blocks with
4−pin alternative connections (M18, 7/8")