Rockwell Automation Publication 1606-RM055B-EN-P - February 2017
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
