Rockwell Automation Publication 1606-RM055A-EN-P - December 2016 11
Basic Power Supply 5 A
Hold-up Time
DC OK Relay Contact
This feature monitors the output voltage that is produced by the power supply
itself. It is independent of a back-fed voltage from a unit that is connected in
parallel to the power supply output (for example, redundant application).
Figure 12 - DC-OK Relay Contact Behavior
Type AC 100V AC 120V AC 230V
24V, 2.5 A typ 64 ms 108 ms 105 ms
min 54 ms 91 ms 88 ms
24V, 5 A typ 26 ms 51 ms 50 ms
min 22 ms 43 ms 42 ms
Figure 10 - Hold-up Time vs. Input Voltage Figure 11 - Shut-down behavior, definitions
0
25
50
125ms
85 120 155 190 230Vac
Input Voltage
Hold-up Time
75
100
a) 24V 2.5A typ.
b) 24V 2.5A min.
c) 24V 5A typ.
d) 24V 5A min.
a b c d a
b
c
d
- 5%
Hold-up Time
Zero Transition
Output
Voltage
Input
Voltage
Attribute 1606-XLB120E
Contact closes As soon as the output voltage reaches 21.4V
Contact opens As soon as the output voltage dips below 21.4V
Contact ratings max 60V DC 0.3 A, 30V DC 1 A, 30V AC 0.5 A resistive load
min 1 mA at 5V DC minimum required load
Isolation voltage See Dielectric Strength
on page 21
21.4V
open
Output Voltage
closed
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