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The AccuPower AQU243 series of switching power supplies are an extremely clean source of uninterrupted power with universal compatibility that allow them to be used anywhere that requires a linear or switching power supply. All of this is contained in a space-efficient 14" by 9" by 3-1/2" 1.5 lb enclosure that takes up less than half of a cubic foot of space.
These single voltage units all produce 3 Amps at 24 VDC of continuous output with their internal transformer. The input voltage range goes from 90 to 240 VAC, and 47 to 63 Hz. The voltage is usually around 13.65, but can be between 9.8 and 13.67 VDC. It operates at a low 27 KHz, and between -4 to 104 degrees Fahrenheit, or -20 to 40 degrees Celsius. The humidity is 95% RH non-condensing.
The AQU243 comes with a battery charger, and supports up to two sealed gel, AGM or wet lead acid batteries. The battery is float charged and won't switch over if the power fails, plus it has low battery form "C" contacts that will alert you if the charge falls too much. There is also a cut-off relay that will keep the battery from discharging too deeply. A plug-in battery cable assembly is provided, and you can get a 36" battery cable assembly if you'd like to mount the battery in a remote location.
This efficient product provides power supervision, which lets you observe the status of the supply and ensure safety. There are three LEDs: green for the AC input, Red for the DC main power, and each output is yellow. It can show two levels of the stand by battery using the form "C" contacts, which can be set up to signal some kind of alarm device. There is an AC FAIL relay that will tell you if the AC power has failed and the unit is running on the stand by battery. There is also a LOW BAT alert that tells you when the battery is low without much backup power left.
The AQU243 tolerates brown outs very well, and has both thermal and short circuit protection. It has a minimum tolerance of 90 VAC, and a maximum of 240 VAC, which might happen in the event of overvoltage. The self-resetting circuit breakers will protect the power supply if there is overcurrent or a reverse battery fault. If anything does happen to the unit, Securitron has a MagnaCare lifetime replacement warranty which won't hold you at fault.
There are also some customizable aspects to this series. Depending on the model, you can get up to eight outputs that are controlled independently of each other. The inputs/outputs can be configured with fire trigger in PTC or with fuse/dry contact. You can also choose to make them fire relay only, or configure outputs with a fire relay input.
There are six different models in this series. The AQU243 and AQU243-8C are both UL 294, UL 603, ULCS318-96, UL 1481 and CSA22.2 No. 205 listed. The AQU241 has one out, while the 8C has eight outputs with a 0.72 Amp PTC fuse. The AQU243-8F has eight outputs with a 2 Amp rated fuse, and is only UL 294 listed. The AQU243-8C1R has eight outputs with a 1.23 Amp rated PTC fuse, and a fire relay. IT is UL 294 listed, and UL 603 and ULCS318-96 recognized. The AQU243-8F8R has eight outputs with a 0.5 Amp rated fuse, eight access control fire relays, and is UL 294 listed. The AQU243-8C8R has eight outputs with a 1.04 Amp PTC fuse and eight access control fire relays, but no listings. The AQU243 is the only model that is not Class 2 Power Limited.
A short but helpful video on Securitron’s line of switching power supplies is available below:
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