Datasheet

CPS20.481-D1
C-Series
48V, 10A, DC/DC CONVERTER
7. HOLD-UP TIME
The internal capacitor, which supplies the energy for the hold-up time is isolated by a diode to the input voltage. A
short on the input line does not discharge the internal hold-up capacitor.
DC 110V DC 300V
Hold-up Time typ. 65ms 65ms at 48V, 5A, see Fig. 7-1
min. 54ms 54ms at 48V, 5A, see Fig. 7-1
typ. 26ms 26ms at 48V, 10A, see Fig. 7-1
min. 21ms 21ms at 48V, 10A, see Fig. 7-1
Fig. 7-1 Hold-up time vs. input voltage Fig. 7-2 Shut-down behavior, definitions
0
10
20
30
40
80ms
120 180 240 300 360Vdc
Input Voltage
50
60
Hold-up Time
48V, 10A, typ.
48V, 5A, min.
48V, 5A, typ.
70
48V, 10A, min.
- 5%
Hold-up Time
Output
Voltage
Input
Voltage
8. 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 90% of the adjusted output voltage level.
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 100ms. Dips shorter than 1ms will be ignored.
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 18.
Fig. 8-1 DC-ok relay contact behavior
100ms
0.9* V
ADJ
<
1ms
10%
open
V
OUT
= V
ADJ
openclosed closed
>
1ms
Oct. 2013 / Rev. 1.2 DS-CPS20.481-D1-EN
All parameters are specified at 48V, 10A, 300Vdc, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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