Auxiliary Terminals - Outback Power Systems FXR2012E Operator's Manual

Auxiliary Terminals

The FXR inverter has a 12V AUX output which can respond to different criteria and control many
operations. These terminals provide a 12 Vdc output that can deliver up to 0.7 Adc.
The AUX output has three states: continuous Off, continuous On, and Auto, which allows that output
to be activated using the automatic auxiliary functions. (All functions are defaulted to Auto.) These
items are based in the inverter and accessed using the system display. The system display and other
devices also have programming, such as AGS, that can control the AUX outputs. To avoid conflicts,
the output should be turned Off when the AGS function is active. (See page 52.)
For the FXR automatic functions, typical applications include signaling a generator to start, sending a
fault alarm signal, or running a small fan to ventilate the batteries. When considering these
applications, plan for both connection requirements and programming with the system display.
The AUX terminals have a series of set points which are used by various functions. Not all points are
used by all functions. Each mode description (below) will show the set points used by that function.

Low DC voltage settings

High DC voltage settings

On delay settings, in increments of 0.1 minutes

Off delay settings, in increments of 0.1 minutes
These settings are not temperature compensated. Compensation is only used for inverter battery charging.
There are nine functions, each geared toward a different application. These functions are summarized
in Table 5 on page 51.
NOTE: The AUX output is defaulted to Vent Fan. A sealed FXR inverter with the Turbo Fan is required
to use the AUX output for fan control. In a single-inverter system, no other functions can be used.

Load Shed can perform load management. It is intended to turn off designated loads during low battery
periods to conserve remaining battery power.

When battery voltage rises above a settable high voltage level, the AUX output is activated after a
settable delay. The AUX output is used to energize a larger external relay (normally open) which is
connected to non-vital loads. The AUX output will be deactivated once the battery voltage falls below a
low voltage setting for a settable delay period.

Load Shed will also turn off when the inverter enters a high-temperature condition or when the AC
output voltage drops below a specific AC voltage for more than 3 seconds. This voltage limit is 15 volts
below the setting of the inverter's output voltage. For the inverter's default output voltage of 120 Vac,
the limit is 105 Vac. (See the menu tables beginning on page 76.) The limit is not otherwise settable.

Load Shed will also turn off if the input current exceeds the Input AC Limit setting while the inverter is
using an AC source.

Settable parameters include:

Low and high DC voltage

On and off delay

Gen Alert is used as a controller for an AC generator with a remote start feature, although it has limited
functionality. (The generator recharges batteries using the inverter's battery charger.)

The AUX output will activate to start the generator when the battery voltage falls to a low set point for a
settable delay. The AUX output is deactivated, shutting off the generator, once the battery voltage rises
to a high voltage setting for a settable delay period.
900-0169-01-00 Rev A
Operation
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