Data Sheet

UB20.241
UB-Series
24V, 20A, DC-UPS
23.7. SERIES USE FOR 48V APPLICATIONS
A series connection for 48V applications is allowed when utilizing two individual power supplies, two DC-UPSs and two
battery modules.
Fig. 23-5 Wiring example for 48V serial use
+ +
- -
Power
Supply
DC 24V, 20A
Output
AC Input
L N PE
48V
Load
+
-
UB20.241
DC-UPS
IN OUT
++
-
-
Inhibit
+ -
Ready
Buffering
BAT
+
-
Replace Battery
(13)
(12)
(11)
+
-
UZK24
Battery
Module
Center-tap
Temp.
Sensor
UB20.241
DC-UPS
IN OUT
++
-
-
Inhibit
+ -
Ready
Buffering
BAT
+
-
Replace Battery
(13)
(12)
(11)
+
-
UZK24
Battery
Module
Center-tap
Temp.
Sensor
+ +
- -
Power
Supply
DC 24V, 20A
Output
AC Input
L N PE
23.8. USING THE INHIBIT-INPUT
The inhibit input is a feature to disable the battery mode on purpose. This can be the case when buffering should
actively be stopped in order to save battery capacity (e.g. when machines are not in use for a long period of time) and
to have shorter recharging times or in case of a service event, where the application must be turned off.
Buffering can be inhibited or stopped:
- When a static voltage is applied to the inhibit input terminals, there will be no buffering after the input voltage is
switched off.
- When, during the battery mode, a short voltage pulse with a minimum length of 250ms is applied to the inhibit
input terminals, the output will switch off and stay off until the input voltage recovers.
Batteries will be charged when the inhibit mode is activated or a voltage is applied to the inhibit input terminals.
Electrical details of the inhibit input are specified in the chapters 9 and 19.
Fig. 23-6 Wiring example for inhibit input Fig. 23-7 Activating the inhibit input
+ +
- -
Power
Supply
DC 24V, 20A
Output
AC Input
L N PE
UB20.241
DC-UPS
IN OUT
++
-
-
Inhibit
+ -
Ready
Buffering
BAT
+
-
Replace Battery
+
-
UZK24
Battery
Module
Load
+ -
Input
Output
Inhibit
Input
Output
Inhibit
250ms
Battery Mode
Case
A
Input
Output
Inhibit
Case
B
Battery Mode
Inhibit not activated !
Case
C
Feb. 2016 / Rev. 2.1 DS-UB20.241-EN
All parameters are specified at 24V, 20A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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