Festo CPX-CMAX - Power Supply

4 Electrical installation
44 Festo – P.BE-CPX-CMAX-SYS-EN – en 2017-09b – English
4.4 Power supply
Operating and load voltage are supplied to the CPX terminal through the interlinking blocks or other compon
ents of the CPX terminal (è CPX system description). Components of the positioning system are supplied
through the CPX-CMAX, which passes on the operating and load voltage of the CPX terminal.
The following is supplied Power supply through
Internal electronics of the following components:
– CMAX
– VPWP
– CASM (optional)
– Displacement encoder
Operating voltage supply for electronics/
sensors (U
EL/SEN
) of the CPX terminal
1)
Valve drive VPWP Load voltage supply of valves (U
VAL
) of the
CPX terminal
1)
+ 24 V DC voltage output VPWP
Digital output VPWP (output brake)
1) Additional information è CPX system description.
Tab. 4.9 Operating and load voltage supply of the positioning system
Note
Malfunctioning due to power supply outside the tolerance.
The module with the lowest tolerance always determines the permitted voltage toler
ances.
 When the CMAX is used, special tolerances in accordance with Tab. 4.10 must be
observed for the load voltage to the valves (U
VAL
) of the CMAX interface.
Load voltage supply to valves (U
VAL
) Tolerance range
1)
Load voltage supply for CMAX [V DC] 20 ... 30
1) Additional information on permissible tolerance ranges of the CPX terminal è CPX system description.
Tab. 4.10 Permissible tolerance range of the load voltage supply of the CMAX
4.4.1 Determining the current consumption
The current consumption of a CMAX depends on the number and type of modules at the axis connec
tion. Recommendation:
 Use a regulated power supply.
 When selecting the power supply unit, check whether it has sufficient output. To do this, calculate
the total current consumption.
Calculation
Tab. 4.11 and Tab. 4.12 show the current consumption for a positioning system.
Observe the notes on selecting the power supply unit in the CPX system description.