Reference Manual User Manual

Rockwell Automation Publication 1606-RM001B-EN-P - August 2013 7
Bulletin 1606 Switched Mode Power Supplies
7. Hold-up Time
8. DC-OK Relay
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.
AC 100V AC 120V AC 230V
Hold-up Time typ. 65ms 65ms 65ms at 24V, 10A, see Figure 7-1
min. 54ms 54ms 54ms at 24V, 10A, see Figure 7-1
typ. 26ms 26ms 26ms at 24V, 20A, see Figure 7-1
min. 21ms 21ms 21ms at 24V, 20A, see Figure 7-1
Fig. 7-1: Hold-up time vs. input voltage Fig. 7-2: Shut-down behavior, definitions
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 Refer to Dielectric Strength
on page 14.
Fig. 8-1: DC-ok relay contact behavior
Output
Cu rr en t
0
42A
18s
18s
18s
2s
2s
2s
t
Short -circuit
Normal
operation
Normal
operation
Output Voltage (dynamic behavior, < 15ms)
0
0
4
8
12
28V
16
20
24
100A4020 60 8010 30 50 70 90
Adjustment
Ran g e
Output Current
0
10
20
30
40
80ms
90 120 155 190 230Vac
Input Voltage
50
60
Hold-up Time
24V, 20A, typ.
24V, 10A, min.
24V, 10A, typ.
70
24V, 20A, min.
- 5%
Hol d-up Time
Zero Tr ansi t ion
Output
Vol t age
Input
Vol t age
100ms
0.9* V
ADJ
<
1ms
10%
open
V
OUT
= V
ADJ
opencl osed cl osed
>
1ms