Securitron AQU244 - Manual (Page 2)

AQU244 & AQU128 Series Installation Instructions
AQU244 & AQU128 Series Instructions Doc.#500-33020 Rev. A
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across the output without lock up or chirping on and off. The battery(s) is protected with an automatic resetting
circuit breaker and diode for over current and accidental reversed battery hookup. Float charging means faster
recovery time for the battery(s). There is no switch over or voltage drop when power fails. Standby battery(s) can
be any capacity between 4 and 40 Amp hours. The precise output voltage provides longer battery life. The
AQU244 24vdc is rated for 4 Amps continuous current with 1 Amp reserved for battery charging. The
AQU12812vdc is rated for 8 Amps continuous current with 2 Amps reserved for battery charging.
Power Supervision includes a battery cut off relay and a separate power trouble alarm relay. The battery cut off
relay removes the battery from the load when the battery reaches its service limit. This prevents damage to the
battery from going into deep discharge. The power trouble alarm relay output, form C contacts, can be used to
signal a buzzer and/or other signaling device. The relay is normally energized for fail-safe operation. The relay
has a green LED that is on when power is good. The relay will drop off of normal when the standby battery(s)
reaches about 70% of capacity after a power a power failure. This low voltage indication represents power trouble.
High voltage failure will also indicate power trouble.
A Service Switch is provided to disable the power output. When the switch is turned off, the power supply is
electronically disabled and the battery cut off relay is de-energized to remove battery from the output terminal. The
switch is marked DC ON with arrow indicating ON. Note On AQU224E and AQU128E units with the CE Mark for
Europe do not have the service switch.
The Smart Fan Power Header provides power for the Smart Fan when the AQU244 or AQU128 is mounted in our
large enclosure. The Smart Fan regulates the temperature in the enclosure by varying the fan speed to keep the
enclosure cool.
Explanation of Terminals and LED’s
AC Input Terminals are marked High Voltage (L)ine, (N)eutral, and (G)round. The terminal block and AC LED are
mounted within a high voltage barrier. The terminal block is self-clamping and can accept wires from 12awg to
18awg. The Green LED adjacent to terminals is ON Green when AC is applied.
Power Trouble Terminals are marked NO-Normally Open, C–Common, and NC–Normally Closed. The normal
relay position indicates the output power is in the normal range and the relay is energized. The terminal block is
self-clamping and can accept wire from 14awg to 24awg. The contacts are rated for up to 2A resistive load to 120
volts. The Green LED adjacent to the terminal block is ON Green when power is in the normal range. When the
AC fails and the battery(s) drop to about 70% capacity, the power trouble relay and LED will go off normal. If an
internal failure caused the output to rise above normal, this would also cause the power trouble relay and LED will
go off normal.
DC Output Terminals on the AQU244 and AQU128 are marked –DC+ output. The AQU244 has a DC output of
24vdc with 4 Amps of continuous current, reserving 1 Amp for battery charging. The AQU128 has a DC output of
12vdc with 8 Amps of continuous current, reserving 2 Amps for battery charging. The terminal block is self-
clamping and can accept wires from 10awg to 24awg. The Red LED adjacent to terminal block is ON when output
voltage is present.
The AQU244 and AQU128 output is not class II power limited. The multi-output (-8C or -16C) models mounted in
an enclosure have one or two PDB-8C distribution boards. The DC output of the AQU244 or AQU128 is fed to
these distribution boards where each output has a PTC circuit breaker. The outputs from the PTC circuit breakers
are class II power-limited. You must keep a .25” minimum spacing of power-limited wires to non-power limited
wiring.
The input and output terminals on the PDB-8C’s are self-clamping and accept wires from 10awg to 24awg. Each
output has a Green LED adjacent to its output that indicates voltage present. Adjacent to the input terminals of the
PDB-8C boards is main Power LED and Fuse. The fuse is an ATO automotive type. Replace with recommended
size. The main power LED will be Green when main power is on. If polarity is incorrect the main LED will light
RED.
Battery Connector is marked –Bat+. This is a .156” 2 position header with lock. The provided battery cable plugs
in to this. The provided cable is 12” long. For remote battery mounting, part WA-36IBAT is a 36” battery cable.
The battery cable wires are Red and Black. The red connects to the positive and black to the negative of the
battery. The AQU24424vdc model comes with a 12” black wire with female slip on connectors on each end for
connecting 2 12v batteries in series.
FAN Power is marked FAN. This is a .1” 2 position header with lock. The fan cable plugs here to provide power
for fan on units mounted in enclosure.