UB40.241
UB-Series
24V,
40A,
DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany
33/34
Parallel use for redundancy
Use two DC-UPSs with two individual power supplies, two battery modules and one decoupling module to build a redundant system.
Recommendations for building redundant systems:
a)
Use separate input fuses for each
power supply.
b)
Set the power supply into “Parallel use” mode if available.
c)
Use a redundancy module to decouple the two power sources.
d)
Monitor the individual sources. Therefore, use the alarm contacts of the power supplies.
e)
It is desirable to set the output voltages of all power supplies to the same value (± 100mV) or leave it at the factory setting.
Please note that the maximal allowed capacitive or inductive load do not double or multiply, when modules are connected in parallel.
Fig. 23-6
Wiring example for parallel use for redundancy
+ +
- -
Power
Supply
DC 24V, 40A
Output
AC Input
L N PE
Load
+
-
YR80
+
-
OUT
+
-
IN 1
+
-
IN 2
Ready
Buffering
Inhibit
UB40
DC-UPS
IN
OUT
+
+
-
-
In
h
ib
it
+
-
R
ea
d
y
B
u
ff
er
in
g
BAT
+
-
R
ep
lac
e
B
at
ter
y
(13)
(12)
(11)
+
-
UZK24
Battery
Module
Center-tap
Temp.
Sensor
UB40
DC-UPS
IN
OUT
+
+
-
-
In
h
ib
it
+
-
R
ea
d
y
B
u
ff
er
in
g
BAT
+
-
R
ep
lac
e
B
at
ter
y
(13)
(12)
(11)
+
-
UZK24
Battery
Module
Center-tap
Temp.
Sensor
+ +
- -
Power
Supply
DC 24V, 40A
Output
AC Input
L N PE
Buffering
