QS20.241, QS20.241-A1, QS20.241-C1
Q-Series
24V, 20A, SINGLE PHASE INPUT
7. HOLD-UP TIME
AC 100V
64ms
32ms
AC 120V
64ms
32ms
AC 230V
99ms
51ms
Hold-up Time
typ.
typ.
at 24V, 10A, see Fig. 7-1
at 24V, 20A, see Fig. 7-1
Fig. 7-1 Hold-up time vs. input voltage
Fig. 7-2 Shut-down behavior, definitions
Hold-up
Time
100ms
Zero Transition
90
80
70
60
50
40
30
20
10
Input
Voltage
- 5%
Output
Voltage
Hold-up Time
Input Voltage
155 190 230Vac
85
120
8. DC-OK RELAY CONTACT
This feature monitors the output voltage, which is produced by the power supply itself. It is independent of a back-fed
voltage from a unit connected in parallel to the power supply output.
Contact closes
Contact opens
As soon as the output voltage reaches the adjusted output voltage level.
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
Contact ratings
As soon as the output voltage exceeds 90% of the adjusted voltage.
max
min
60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A
1mA at 5Vdc
resistive load
min. permissible load
Isolation voltage
See dielectric strength table in section 18.
Fig. 8-1 DC-ok relay contact behavior
VOUT = VADJ
0.9* VADJ
10%
<
>
250ms
1ms
1ms
open
closed
open
closed
Note: The DC-ok feature requires that the output voltage reaches the nominal (=adjusted) level after turn-on in order to function according
to specification. If this level cannot be achieved, the overload lamp will be on and the DC-ok contact will be open. The overload signal
will only shut off as soon as the adjusted voltage is reached. This is an important condition to consider particularly, if the load is a
battery, the power supply is used in parallel or the power supply is used for N+1 redundant systems.
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.
8/26
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