Short description

The battery buffered DC power supply is working according the stand-by parallel mode and ensures in connection with a lead-acid accumulator a safe continuous DC power supply during a determined time interval in case of mains failure. The total output current is shared between supply of the loads and charging of the batteries.


Technical Data

Nominal input voltage

110/230 V AC (±15%)

Input voltage range for charging operation

93.5 V … 264.5 V

Nominal frequency

47 Hz … 63 Hz

Power consumption

90 VA

Self current consumption

100 mA @ 24 V

Max. nominal input current

0.5 A

Max. inrush current

35 A / 2 ms

Max. nominal output current

3 A

Nominal output voltage (in mains operation)

24 V DC

Output voltage range (with temperature tracking)

26.4 V … 28.6 V DC ±0.4%

Charging characteristics

I/U DIN41773

Charging end voltage without temp.-Sensor

26.4 V DC ±0.4%

Deep discharge protection and load shedding

20.4 V DC ±0.4%

Max power loss ‚worst-case‘

14 W


85% q (Ue=230 V; Ua=26.4 V DC; Ia=INenn)

Voltage ripple

< 100 mV eff.

Internal device protection

2 A (T), 250 V

Fuse DC-output circuit (external)

5 A(T)

Fuse DC-battery circuit (external)

5 A(T)

Max. signal contact load (mains-OK[1])

30 V/ 0.5 A
potential-free relay-contact

Max. signal contact load (Bat-OK 1)

30 V/ 0.5 A
potential-free relay-contact 

Max. signal contact load (General fault 1)

30 V/ 0.5 A
potential-free relay-contact

Max. signal voltage range (Shut-Down)

24 V DC (6-45 V DC)
floating switching input

Accumulator type

Pb-accumulator, maintenance-free
max 2x26 Ah

Back-up time

Accumulator specific

Protective system


Operating temperature

-10 °C … 50 °C

Storage temperature

-10 °C … 50 °C

Rel. humidity

≤95% no condensation

Max. installation altitude

2000 m above sea level

Dimensions (HxWxD)

362 mm, 464 mm, 145 mm


7,5 Kg

[1] The signal contacts are coupled with LED displays. The illumination of a LED effects the activating of the corresponding relay.




File Format
VdS certificate2021PDF
3D model211014stp

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