Datasheet

QTD20.241
Q-Series
24V, 20A, DC INPUT
6. HOLD-UP TIME
DC 600V
Hold-up Time typ. 44ms At 24V, 10A, see Fig. 6-1
min. 36ms At 24V, 10A, see Fig. 6-1
typ. 22ms At 24V, 20A, see Fig. 6-1
min. 18ms At 24V, 20A, see Fig. 6-1
Fig. 6-1 Hold-up time vs. input voltage Fig. 6-2 Shut-down behavior, definitions
0
10
20
30
40
50ms
400 500 600 700 800Vdc
Input Voltage
Hold-up Time
2
4
V,
1
0
A
,
t
y
p
.
2
4
V
,
2
0
A
,
t
y
p
.
2
4
V,
1
0
A
,
m
i
n
.
24V, 20A, min.
- 5%
Hold-up Time
Output
Voltage
Intput
Voltage
7. DC-OK RELAY CONTACT
This feature monitors the output voltage, which is produced by the DC/DC converter itself. It is independent of a back-
fed voltage from a unit connected in parallel to the DC/DC converter output.
Contact closes As soon as the output voltage reaches the adjusted output voltage.
Contact opens As soon as the output voltage dips more than 10% below the adjusted output voltage.
Short dips will be extended to a signal length of 250ms. Dips shorter than 1ms will be ignored.
Contact re-closes As soon as the output voltage exceeds 90% of the adjusted voltage.
Contact ratings max. 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A Resistive load
min. 1mA at 5Vdc Min. permissible load
Isolation voltage See dielectric strength table in section 17.
Fig. 7-1 DC-ok relay contact behavior
250ms
0.9* V
ADJ
<
1ms
10%
open
V
OUT
= V
ADJ
openclosed closed
>
1ms
Oct. 2016 / Rev. 2.0 DS-QTD20.241-EN
All parameters are specified at 24V, 20A, 600Vdc input, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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