Festo MPA-S - Page 149

A Technical appendix
Festo – P.BE-MPA-E N – 1309f – English 149
MPA-S valve terminal with CPX terminal or CPI-interface
Electronics module VMPA...-FB-…
Operating voltage supply for electronics (U
EL/SEN
):
Nominal voltage 24 V DC ±25 %
Intrinsic current consumption at 24 V
(internal electronics, all outputs logic 0)
typ. 8 mA
Load voltage supply for valves (U
VAL
) VMPA...-FB-EMG-... VMPA...-FB-EMS-...
Nominal voltage 24 V DC ±25 % 24 V DC ±25 %
Intrinsic current consumption at 24 V
(internal electronics, without valves)
typ. 23 mA typ. 3 mA
Diagnostic message undervoltage U
VAL
,load
voltage outside the function range
≤17.5 … 15.5 V ≤17.5 … 15.5 V
Current consumption per solenoid coil out of load
voltage U
VAL
at 24 V
MPA1 MPA2
Pull current 58 mA for 24 ms 99 mA for 24 ms
With current reduction 9mAafter24ms 18 mA aft er 24 ms
Pressure sensor plate
Current consumption U
EL/SEN
at 24 V 21 mA
Accuracy < ±2.5 % FS (full scale)
Display increments 20 mbar
Proportional pressure regulator VMPA-…T A...
Operating voltage supply
Nominal voltage 24 V DC (permitted residual ripple max. ±10 %)
Current consumption Max. 300 mA
Example of current calculation
Current consumption with two solenoid coils MPA2 switched in parallel and one electronics module
without separate circ uits:
–I
EL/SEN
= 1 x 8 mA =8 mA
– Current consumption during pick-up phase (24ms): I
VAL
= 3 mA + 2 x 99 mA = 202 mA
– Current consumption with current reduction: I
VAL
= 3 mA + 2 x 18 mA = 39 mA
Tab . A.16 Electric data: MPA-S valve terminal with CPX terminal or CPI-interface
Tec hnical data on the electronics module of the MPA-S valve terminal with CPX terminal or
CPI-interface can be found in the electronics description for the module ( system de-
scription for your CPX terminal, table “Descriptions of the CPX te rminal”).