Instructions

EN
UB20.241 Installation Manual
Functional Description
The device can supply any kind of loads, including unlimited capacitive and inductive loads.
Do not apply return voltages from the load to the output terminals higher than 35V.
Green Status LEDs
This LEDs are on solid, when the battery is charged more than 85%. During battery charging, the
LEDs are flashing with a slow frequency and rapid flashing is an indication of a buffer event. After the
unit is turned on with charged batteries, it can take 20 seconds or longer that the signal switches from
charging to ready. LED1 refers to battery 1, which is electrically closer to the (+) pole and LED 2 refers
to battery 2, which is closer to the (-) pole.
Yellow Diagnoses LED
This LED reports an overload situation, an expired buffer time (flashes for 15 minutes), an activated inhibit
input or when the battery should be replaced.
Red Check Wiring LED
This LED indicates a failure in the installation such as too low or to high input voltage, too high or too low
battery temperature, too high DC-UPS controller temperature, incorrect wiring, blown or missing battery fuse.
Buffer-time Limiter
The buffer time during a buffer event can be set to 10s, 30s, 1min, 3min, 10min or infinity with the dial
on the front. This can save battery energy for faster recharge and expand the lifetime of the battery.
When dial is set to infinity, buffering continues until stopped by the battery deep-discharge protection.
Battery Size Selector
Set the jumper according to the used battery size (<10Ah or >10Ah), which allows an optimal use of
small and large battery sizes. A missing jumper equals a <10Ah setting.
Buffer Voltage Selector
With this selector, the output voltage in battery mode can be set to 22.5V, 24V, 25V or 26V. The
setting of the output voltage in battery mode must be minimum 1V lower than the input voltage in
power supply mode.
Inhibit Input
The inhibit input disables or stops buffering. In power supply mode, a continuous input of 10-30V is
required. During buffering, a short input of 10-30V for at least 250ms is required to stop buffering. The
current of the inhibit input is limited to 6mA by the DC-UPS control unit.
Ready, Buffering and Replace Battery Relay Contacts
The Ready contact is closed when the battery is 85% charged and the unit is ready to buffer.
The Buffering contact is closed when the unit is in buffer mode.
The Replace Battery contact is closed when a battery replacement is necessary. The battery need to
be replaced is indicated by the green LED which is off.
Contact ratings: 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A for resistive loads.
LED Signal Pattern
Ready
Charging
Buffering
Green Status LED:
Overload
Replace Battery
Buffer Time
Expired
Inhibit Active
Yellow Diagnosis LED:
Check Wiring
Red Error LED:
Input Voltage
Temperature