Power Supply Concept, Formation Of Power Zones - Festo CPX-CMAX-C1-1 Mounting, Installation And Diagnostics

3. Electrical installation

3.4.2 Power supply concept, formation of power zones

3−14
The modular power supply concept of the CPX terminal allows
power zones to be formed.
Observe the following:
The internal electronics of the VPWP and the digital posi
tion measuring system and, if present, the sensor inter
face are supplied with power by the electronics/sensors
operating voltage supply (U
The VPWP load supply and the VPWP outputs are sup
plied with power by the valve load supply (U
The CMAX internally connects the contact rails 0 V
to 0 V of the CPX terminal.
VAL
This means that the operating power supply for the
electronics/sensors (U
the CMAX load supply for the valves (U
longer electrically isolated.
Complete electrical isolation (all poles) of the valve
supply of the VPWP is therefore not possible, even in
conjunction with a CPX valve supply of type CPX−EV−V.
Note
Damage to components and operative malfunctions!
The CMAX must be supplied via the same potential
·
(common power supply unit) as the operating power
supply for the electronics/sensors (U
CPX terminal (see also Fig. 3/3).
The CMAX always connects the 0 V supply for the elec
tronics with the 0 V supply for the valves. This must be
observed when a CPX−GE−EV−V interlinking block is located
to the left of the CMAX because this can remove any inten
tional electrical isolation.
).
EL/SEN
VAL
) of the CPX terminal and
EL/SEN
) are no
VAL
) of the
EL/SEN
Festo P.BE−CPX−CMA X−SYS−EN en 0908NH
).
EL/SEN