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NTM2408-1_DBL_LST_EN_0851.PDF • PAGE 1
ABuilding Safety. Building Security.
Power Supply Module
NTM2408-1
Description
The Power Supply Module NTM2408-1 serves for the
safe supply of devices, which need a nominal voltage of
24VDC. The typical fi elds of application include fi re de-
tection systems and extinguishing controls or any other
applications requiring a safe power supply.
The output voltage of the integrated switched-mode
power supply is current-limited and short-circuit-protec-
ted.
The optional stand-by batteries guarantee an uninterrup-
ted power supply in the event of a mains power fault.
At a typical charging time of 24 hours, batteries with a
maximum capacity of 220Ah can be charged. The inte-
grated protection against total discharge and the tem-
perature compensated battery charging are the basis
for a long battery life.
The battery monitoring according to EN 54-4:2006 in-
cludes the periodical measurement of the battery volta-
ge under load and the internal resistance of the battery.
The integrated earth leakage monitoring of the module
can be deactivated for special applications.
The module is designed for installation into a power sup-
ply housing. For that purpose, three different housings
are available. At the front of the housing, seven light
emitting diodes indicate the operation as well as pos-
sible causes of faults.
By means of the integrated test function, a functional
check can be performed and the present value of the
internal resistance of the battery can be read out. With
that, the maintenance of power unit and batteries is es-
pecially easy and timesaving.
• Uninterrupted power supply for
devices with 24VDC, max. 8.4A
• Current-limited, short-circuit-
protected output
• Monitoring of battery charging and
internal resistance of the batteries
• Installation into wall-mount cabinet or
19“ housing
• Status display at the housing front
• Complies with EN 54-4:2006
Specifi cations
Operating voltage 230V +10/-20%, 47 – 63Hz
Output voltage typ. 27.6VDC
Output current max. 8.4A
Ambient temperature -5°C to +50°C
Relative humidity max. 95% (no condensation)
Dimensions L × W × D 290 × 220 × 70 (mm)
Weight 1.5kg
Approvals VdS G208125
0786-CPD-20529
Order number 317021
Order name Power Supply Module NTM2408-1