Puls ML50.100 Power Supply Guia De Especificação

ML50.100, ML50.109 

 

MiniLine 

 

24V, 2.1A, S

INGLE 

P

HASE 

I

NPUT

 

 

 

Mar. 2007 / Rev. 1.0  DS-ML50.100-EN 
All parameters are specified at 24V, 2.1A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. 

16/20 

 

27. A

PPLICATION 

N

OTES

 

27.1. P

EAK 

C

URRENT 

C

APABILITY

 

Solenoids, contactors and pneumatic modules often have a steady state (sealed) 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. 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 (fuse, circuit breaker) 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. 27-1   Peak load 4.2A for 50ms, typ. 

Fig. 27-2   Peak load 10.5A for 5ms, typ. 

10ms/DIV

Output
Voltage

Output
Current

24.0V

0A

4.2A

16V

 

1ms/DIV

Ou

tpu

t

Vo

ltag

e

Output
Current

24.0V

0A

10.5A

10.5V

 

Peak load 4.2A (resistive) for 50ms 

Output voltage dips from 24V to 16V. 

Peak load 10.5A (resistive) for 5ms 

Output voltage dips from 24V to 10.5V. 

 

27.2. 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 10.