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Technical Support: +44(0)23 9269 6638 (option 3)
PAK200609_01F Jan 2021 ©2019 ELMDENE INTERNATIONAL LTD
27.6V dc 5A Switch Mode Power Supply for Fire, Access and General Applications
STX2405-MOD
F
EATURES
The STX2405-MOD is an un-boxed switch mode power supply ideal for use in Fire, Access Control and
General Applications. Its regulated 27.6V dc output will supply up to 5 Amps continuously into the
load, in addition to providing up to 850mA for charging the standby batteries up to 17Ah. The power
supply output features electronic short circuit protection under both mains and standby battery
operation. Maximum battery life is assured through continuous active battery monitoring and the use
of a two stage charger, comprising bulk and temperature compensated final float phase depending
upon battery condition. Once fully charged the product operates in Eco power saving mode, whereby
the batteries are charged for 4 hours in every 24 hour period while still being continuously monitored.
This reduces wasted energy in charging already fully charged batteries and extends their working life.
Deep discharge protection prevents premature battery failure when operating from standby for
extended periods. Two sets of volt free solid state relay fault output, signal (i) loss of mains and (ii)
battery fault, charger fault and loss of output.
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Up to 5A current to load at 27.6V dc nominal regulated output.
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Charging capability to support 7 or 17Ah batteries.
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Electronic overload protection shuts down output until overload or short circuit is removed.
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Battery Monitor detects battery missing, low battery, short-circuit, reverse connection or circuit
impedance (Ri) in excess of 300m
caused by connector or wiring corrosion.
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Battery charging circuit is energised only when a battery is correctly connected and the battery
voltage is greater than 14V.
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No loss of output during automatic connection of battery to load on loss of mains.
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Deep discharge protection disconnects battery from load when battery voltage level falls below
21V.
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Internal diagnostic indicator LED (Orange).
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Fault indicator LED (Yellow) flashes on detection of output fault, battery fault, charger fault and
mains failure.
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Mains indicator LED (Green) showing mains present Indicators check at start-up.
Elmdene International Ltd
Tel: +44(0)23 9269 6638
3 Keel Close, Interchange Park,
Fax: +44(0)23 9266 0483
Portsmouth, Hampshire, PO3 5QD, UK
0843-CPR-0215 14 (UL)
2531-CPR-CSP11214 20 (DBI)
