Data Sheet

UB20.241
UB-Series
24V, 20A, DC-UPS
Fig. 14-2
Flashing pattern for green “Status LED”
1
0
Ready
1
0
Charging
1
0
Buffering
10
Hz
Each battery has its own status LED. The signals are the
same for both batteries.
Ready:
The LEDs are on solid when the battery is charged (> 85%),
no wiring failure is recognized, input voltage is sufficient.
After the unit is turned-on with charged batteries, it can
take 20s or longer that the signal switches from charging
to ready.
Charging:
The LEDs are flashing with a low frequency when the
batteries are charging and the state-of-charge is below
85%.
Buffering:
The LEDs are flashing with a high frequency when the unit
is in battery mode.
Fig. 14-3
Flashing pattern for yellow “Diagnoses LED”
1
0
Overload
1
0
Replace
Battery
1
0
Buffertime
expired
1
0
Inhibit
active
5
Hz
This LED helps troubleshooting.
Overload:
The LED is on solid when the output current is permanently
above 20A in battery mode or 25A in power supply mode.
Replace Battery:
The LED is flashing with a low frequency when one battery
has failed the periodically performed battery quality test.
In case the center-tap connection is present, the battery
that has failed is indicated by the green LED which is off.
Otherwise, both LEDs are off. The battery should be
replaced as soon as possible.
Buffertime expired:
The LED is double flashing when the output has switched
off due to the setting of the buffer-time limiter or
discharged battery. This signal will be displayed for 15
minutes after the output has switched off.
Inhibit active:
The LED is flashing with a high frequency when buffering
is disabled due to an active inhibit signal.
Fig. 14-4
Flashing pattern for red “Error LED”
1
0
Check
Wiring
1
0
Input
Voltage
1
0
Temp.
This LED indicates that charging or buffering is not
possible.
Check Wiring:
The LED is on solid when a failure in the wiring, battery or
battery fuse is identified.
Input Voltage:
A single flash indicates that the input voltage is >30V or
the input voltage is too low for the adjusted buffer
voltage. The input voltage must be at least 1V higher than
the selected buffer voltage.
Temperature:
A double flash indicates that the temperature of the DC-
UPS is too high (> 70°C) or that the temperature of the
battery is too high (> 50°C) or too low (< -10°C in setting
<10Ah). Battery temperatures indications require a
connected battery temperature sensor.
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.
www.pulspower.com Phone [phone] Germany
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