Festo CPX-CMAX, Описание

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4 Electrical installation
Festo – P.BE-CPX-CMAX-SYS-EN – en 2017-09b – English 45
Current consumption of the CMAX from U
EL/SEN
of the CPX terminal
Current consumption at nominal operating voltage [mA] 200
Maximum current consumption 400
Tab. 4.11 Current consumption from U
EL/SEN
of the CPX terminal
Current consumption of the CMAX from U
VAL
of the CPX terminal
Max. current consumption of valve drive VPWP [A] 1.2
Max. load current of the digital output VPWP – optionally usable 0.5
Max. load current of the voltage output VPWP – optionally usable 0.5
Total current consumption (max. 2.5 A) 2.2
Tab. 4.12 Current consumption of the CPX terminal from U
VAL
4.4.2 Power supply concept, formation of power zones
The modular power supply arrangement of the CPX terminal facilitates formation of voltage zones. The
internal electronics of the VPWP, the digital displacement encoder and the sensor interface are supplied
with power from the electronics/sensors operating voltage supply (U
EL/SEN
). The VPWP load voltage
and the digital outputs at the VPWP are supplied with power from the valve load voltage (U
VAL
)
(
è
Section 4.4).
Note
The CMAX connects internally the contact rails U
EL/SEN
(0 V) and U
VAL
(0 V) of the CPX
terminal.
– As a result, the operating voltage supply for the electronics/sensors (U
EL/SEN
) of the
CPX terminal and the load supply for the valves (U
VAL
) supplying the CMAX are no
longer electrically isolated, regardless of the system supply used, up to the next
additional power supply for valves.
– As a result, complete electrical insulation (all pins) of the load voltage of the VPWP is
not
possible, even in connection with an additional power supply for valves CPX-EV-V.
Note
Damage to components and malfunctions!
The load voltage supply (U
VAL)
for the CMAX and the components of the positioning
system must be supplied with the same potential as the operating voltage supply for
electronics/sensors (U
EL/SEN
).
Use a shared power supply unit (
è
Fig. 4.1).
Observe the information on power supply and the required earthing measures in the CPX
system description (P.BE-CPX-SYS-...).