Product Description
The UB20.241 uninterruptible power supply controller (DC-UPS) is used in addition with a 24V power supply and batteries to bridge power failures or voltage fluctuations. This configuration can prevent expensive downtimes, long restart cycles and loss of data. A unique feature of the UB20 series is the constant voltage in battery mode, which will not change as the batteries discharge. The buffer voltage in battery mode can be set to four different output values. Another feature is the utilization of two independent battery chargers for the two 12V-batteries in series. This feature makes matching batteries unnecessary and allows for precise battery charging, testing and optimized usage of the battery capacity to achieve the longest battery service life. The UB20.241 includes many battery diagnostic functions that ensure a reliable operation of the entire system. Furthermore, a temperature controlled charging extends the life of the batteries. It also includes a selectable buffer time limiter as well as ready, buffering and replace battery contacts. For safety and maintenance, an inhibit input signal is included which prevents a battery backup.

DC-UPS Control Unit

• No Change in Output Voltage in Battery Mode
• Selectable Output Voltages in Battery Mode
• 1-Battery-Concept Each 12V Battery is Charged and Monitored Separately for Longest Battery Life
• Precise Battery Charging by Using a Temperature Sensor
• Battery Size Selector for Small or Large Batteries
• 50% BonusPower®, 30A for up to 4s
• High Breaking Capacity for Branch Protectors
• Smart Battery Diagnostics and Monitoring Functions
• 3 Year Warranty

Order Numbers
DC-UPS
UB20.241 Standard DC-UPS unit
UB20.241-C1 Conformal coated pc-boards

Accessory
UZK24.071 Battery module 24V, 7Ah
UZO24.071 UZK24.071 without batteries
UZK24.121 Battery module 24V, 12Ah
UZO24.121 UZK24.121 without batteries
UZS24.100 Sensor & center tap board
ZM2.WALL Wall/panel-mount bracket
ZM12.SIDE Side-mount bracket