Hold-up time, Dc-ok relay contact – Rockwell Automation 1606-XLS240E, -XLS240EA, -XLS240EC, -XLS240E-D Power Supply Reference Manual User Manual
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All parameters are specified at 24V, 10A, 230Vac, 25°C ambient and after a 5 minutes run-in time, unless noted otherwise.
Rockwell Automation Publication 1606-RM044A-EN-P — March 2014
9
Bulletin 1606 Switched Mode Power Supplies
7. Hold-up Time
AC 100V
AC 120V
AC 230V
Hold-up Time
typ.
51ms
53ms
55ms
at 24V, 5A, see Fig. 7-1
typ.
26ms
27ms
28ms
at 24V, 10A, see Fig. 7-1
Fig. 7-1 Hold-up time vs. input voltage
Fig. 7-2 Shut-down behavior, definitions
10
20
30
40
50
60ms
85
120
155
190
230Vac
Input Voltage
24V, 5A, min.
24V, 5A, typ.
24V, 10A, min.
24V, 10A, typ.
Hold-up Time
- 5%
Hold-up Time
Zero Transition
Output
Voltage
Input
Voltage
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
As soon as the output voltage reaches 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 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 18.
Fig. 8-1 DC-ok relay contact behavior
250ms
0.9* V
ADJ
<
1ms
10%
V
OUT
= V
ADJ
>
1ms
open
open
closed
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, if the power supply is used in parallel or if the power supply is used for N+1 redundant systems.