Puls CS3.241 Power Supply Guia De Especificação

 

 

 

CS3.241 

 

  C–Series 

24V, 3.3A, S

INGLE 

P

HASE 

I

NPUT

 

 

 

September. 2007 / Rev. 1.1  DS-CS3.241-EN 
All parameters are specified at 24V, 3.3A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. 

17/21 

 

26. A

PPLICATION 

N

OTES

 

26.1. P

EAK 

C

URRENT 

C

APABILITY

 

Solenoids, contactors and pneumatic modules often have a steady state coil and a pick-up coil. The inrush current 
demand of the pick-up coil is several times higher than the steady state current and usually exceeds the nominal 
output current (including the PowerBoost) The same situation applies, when starting a capacitive load. 

Branch circuits are often protected with circuit breakers or fuses. In case of a short or an overload in the branch 
circuit, the protective device needs a certain amount of over-current to trip or to blow. The peak current capability 
ensures the safe operation of subsequent circuit breakers. 

Assuming the input voltage is turned on before such an event, the built-in large sized output capacitors inside the 
power supply can deliver extra current. Discharging this capacitor causes a voltage dip on the output. The following 
two examples show typical voltage dips: 

Fig. 26-1   Peak load 6.6A for 50ms, typ. 

Fig. 26-2   Peak load 16.5A for 5ms, typ. 

10ms/DIV

Output
Voltage

Output
Current

24V

0A

6.6A

12.5V

 

1ms/DIV

Output
Voltage

Output
Current

24V

0A

16.5A

7V

 

Peak load 6.6A (resistive) for 50ms 

Output voltage dips from 24V to 12.5V. 

Peak load 16.5A (resistive) for 5ms 

Output voltage dips from 24V to 7V. 

 

26.2. C

HARGING OF 

B

ATTERIES

 

The power supply shall not be used to charge batteries. 

26.3. B

ACK

-

FEEDING 

L

OADS

 

Loads such as decelerating motors and inductors can feed voltage back to the power supply. This feature is also called 
return voltage immunity or resistance against Back- E.M.F. (Electro Magnetic Force). 

This power supply is resistant and does not show malfunctioning when a load feeds back voltage to the power 
supply. It does not matter, whether the power supply is on or off. 

The maximum allowed feed back voltage is 35Vdc. The absorbing energy can be calculated according to the built-in 
large sized output capacitor which is specified in chapter 9.