Outback Power Systems Effective Use of AUX Terminals in GS8048 Inverter Operations

Operation

Auxiliary Terminals

The Radian inverter has two sets of terminals which can respond to different criteria and control many functions. The 12V AUX terminals provide a 12 Vdc output that can deliver up to 0.7 Adc to control external loads. The RELAY AUX terminals are “dry” relay contacts with no voltage. Each set of terminals has its own set of programmed criteria. Each has identical options available. (When the options described below refer generically to the “AUX output”, it can mean either set of terminals.)

Each AUX output has three states available: continuous Off, continuous On, and Auto, which allows that output to be activated using the automatic auxiliary functions. (All functions on both sets of terminals are defaulted to Off.) These functions are based in the Radian inverter and accessed using the MATE3. The MATE3 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 32.)

For the Radian automatic functions, typical applications include signaling a generator to start, sending a fault alarm signal, or running a small fan to ventilate the batteries. See the Radian Series Inverter/Charger Installation Manual for more information on hooking up each set of terminals. See the MATE3 Owner’s Manual for instructions on programming each function.

The AUX terminals have a series of set points which are used by various functions. Both sets of terminals have the same options available, but they are programmed independently. Not all set points are used by all functions. Each AUX mode description below will detail the set points that are used for that mode.

∼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

There are nine functions, each geared toward a different application. The first item on this list may not be the default function displayed in either menu.

Load Shed can perform load management. 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 relay, 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 turn off when the inverter enters a high-temperature condition or when the AC output voltage drops below 105 Vac for more than three seconds. It will also turn off if the input current exceeds the Input AC Limit setting while the inverter is using an AC source.

Parameters include:

∼Low and high DC voltage

∼On and off delay

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