Data Sheet
QS20.241, QS20.241-A1, QS20.241-C1
Q-Series
24V, 20A, SINGLE PHASE INPUT
Switching Frequencies
The power supply has four converters with four different switching frequencies included.
One is nearly constant. The others are input voltage and load dependent.
Switching frequency 1 100kHz Resonant converter, nearly constant
Switching frequency 2 110kHz to 500kHz Boost converter, input voltage and load dependent
Switching frequency 3 73kHz to 114kHz PFC converter, input voltage and load dependent
Switching frequency 4 35kHz to 45kHz Aux. converter, input voltage and load dependent
15. ENVIRONMENT
Operational temperature
*) -25°C to +70°C (-13°F to 158°F) reduce output power according Fig. 15-1
Storage temperature -40 to +85°C (-40°F to 185°F) for storage and transportation
Output de-rating 12W/°C 60-70°C (140°F to 158°F)
Humidity **) 5 to 95% r.H. IEC 60068-2-30
Vibration sinusoidal 2-17.8Hz: ±1.6mm; 17.8-500Hz: 2g
2 hours / axis
IEC 60068-2-6
Shock 15g 6ms, 10g 11ms
3 bumps / direction, 18 bumps in total
IEC 60068-2-27, DIN-rail mounting
30g 6ms, 20g 11ms
3 bumps / direction, 18 bumps in total
IEC 60068-2-27, with wall mounting bracket
ZM2.WALL
Altitude 0 to 2000m (0 to 6 560ft) without any restrictions
2000 to 6000m (6 560 to 20 000ft) reduce output power or ambient temperature,
see Fig. 15-2
IEC 62103, EN 50178, overvoltage category II
Altitude de-rating 30W/1000m or 5°C/1000m > 2000m (6500ft), see Fig. 15-2
Over-voltage category III IEC 62103, EN 50178, altitudes up to 2000m
II altitudes from 2000m to 6000m
Degree of pollution 2 IEC 62103, EN 50178, not conductive
LABS compatibility The unit does not release any silicone or other LABS-critical substances and is suitable for
use in paint shops.
*) Operational temperature is the same as the ambient temperature and is defined as the air temperature 2cm below the unit.
**) Do not energize while condensation is present
Fig. 15-1 Output current vs. ambient temp. Fig. 15-2 Output current vs. altitude
Allowed Output
Current at 24V
0
-25 0 20 40
70°C
5
10
15
20
25
30A
c
o
n
t
i
n
u
o
u
s
60
Ambient Temperature
f
o
r
t
y
p
.
4
s
Allowed Output
Current at 24V
0
0 2000 4000
6000m
5
10
15
20
25
30A
c
o
n
t
i
n
u
o
u
s
Altitude
f
o
r
t
y
p
.
4
s
A
.
.
.
T
a
m
b
<
6
0
°
C
B
.
.
.
T
a
m
b
<
5
0
°
C
C
.
.
.
T
a
m
b
<
4
0
°
C
A
B
C
Oct. 2013 / Rev. 2.2 DS-QS20.241-EN
All parameters are specified at 24V, 20A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany
14/26