C-TEC 2403-1of

Capacitor-buffered Power Supply

Type       :   C-TEC 2403-1of (open frame)
Art.-No. :    NCP20727G02051




Short description

The buffered DC power supply of the C-TEC of series is an open frame device, a board, which includes ultra-capacitors as energy storage inside the housing. During normal operation this capacitor is charged from the system voltage (Ue). The connected DC consumers are supplied as well from the system voltage. In case of an interruption of the system voltage, the energy of the ultra-capacitor is realesed regulated. With a dc/dc converter the load is supplied from the capacitor until it is discharged. The backup time depends on the state of charge of the capacitor and the discharge current.

The power supply hast he following characteristics:

  • Maintenance-free  because of long-life ultra-capacitors
  • Mikrocontroller based charging and discharging oft he ultra-capacitors
  • Control of operation and status of charge with potential-free contacts and LED
  • Capacity extension possible with external capacitor extension modules

Technical Data

Nominal input voltage

24  V DC -15 % / 10 %

Input voltage range

20,4 V … 26,4 V DC

Min. charging voltage

23,7 V DC

Nominal input current (at 24,0 V DC) C charged 3 A load

3,1 A DC

Output voltage in back-up operation

23,0 V DC ±2 %

Max. nominal output current

3 A DC (at 0,94 kJ)

Nominal output current at maximum energy

2 A DC (at 1,0 kJ)

Current limitation

1,05 … 1,2 x INenn

Power loss at Uc >

2,5 W

power loss at 100% load and charging

7 W (max 60 seconds)

Efficiency at Uc>

>96% @ (Ue=24,0 V DC; Ua=22,9 V DC; Ia=INenn)

Internal device protection (internal)

4 A (T)

Fuse DC-output circuit (external)

3 A (T)

Type of connection: input Ue

Spring terminal max. 1,0 mm²

Type of connection: output Ua

Spring terminal max. 1,0 mm²

Type of connection: message contact

Spring terminal max. 1,0 mm²

Max. load message contact (Ue-OK[1])

30 V/ 0,5 A
potentialfree relay contact

Protective system

IP20 a. EN 60529

Environmental temperature

-20 °C … 60 °C

Storage temperature

-20 °C … 60 °C

Rel. humidity

≤95% condensation not permissible

Max. mounting height (without load reduction)

2000 m above sea level

dimensions (HxWxd)

110 mm, 90 mm, 45 mm


0,3 Kg

UL approvals No

[1] The message contacts are coupled with the  LED display. The illumination of a LED effects the activation of the corresponding relay.


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