Short description

The accumulator buffered DC supply works according to the standby parallel principle and guarantees in connection with a lead accumulator and for a certain amount of time, a safe back-up operation of the DC supply in case of mains failure. The overall output current is split up between consumer supply and lead accumulator charging.

The power supply is characterized by the following properties:

  • Primary switched power supply with I/U charging characteristics
  • Active power factor correction (PFC)
  • Micro-controller supported lead accumulator management
  • RS232 for monitoring and parameterization
  • Temperature tracking of the charging voltage with external temperature sensor

Technical Data 

Nominal voltage115/230 VAC (±15%)
Input voltage range for charging operation93,5...264,5V
Nominal frequency47 Hz...63 Hz
Power consumption90 VA
Self current consumption100mA@24V
max. nominal input current0,5 A 
max. inrush current: 35 A / 2 ms, max.

max. nominal output current

output voltage (in mains operation)                24V DC
output voltage range (with temperature tracking)26,4V DC...28,6VDC ± 0,4%

charging characteristics

I/U DIN41773

Final charging voltage without temperature tracking

26,4 V DC ± 0,4%

Deep discharge protection and load shedding20,4 V DC ± 0,4%
Max.power loss "worst-case"     14W
Efficiency 85%@ (Ui=230 V; Uo=26,4V DC; Io=Inom
Internal device protection2,0 A (T), 250 V)
Fuse DC-output circuit (external)5 A (T, UL-248)
Fuse DC-battery circuit (external)5 A (T, UL-248)
Connection in parallelyes
Connection in seriesno
Max. load message contact30 V / 0,5 A potentialfree relay-contact
Type of battery

PB-accu, maintenance-free, 

max. 40 Ah

Protective systemIP 54
Storage temperature-10°C up to 50°C
Operational temperature-10°C up to 50°C
Relative humidity≤ 95% no condensation
Dimensions (HxWxD): 500 x 500 x 300mm 
Weight:   25,5 kg




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