Outback Power Systems GS3548E Operators Manual - Manual (Page 45)

Operation
900-0145-01-01 Rev A 43
Auxiliary Terminals
The Radian inverter has two sets of terminals which can respond to different criteria and control many
operations. 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 rated up to 10 amps (at 250 Vac or 30
Vdc). 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: continuous
Off, continuous On, and Auto, which allows that output
to be activated using the automatic auxiliary functions. (All functions are defaulted to Off.) These
items are based in the Radian 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 47.)
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. 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. 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 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. (The 12V AUX and RELAY AUX
outputs are defaulted to different selections.) These functions are summarized in Table 5 on page 46.
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 30 volts
below the setting of the inverter’s output voltage. For the Radian’s default output voltage of 230 Vac,
the limit is 200 Vac. (See page 69.) 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.)
∼ Either set of AUC terminals may be used to start the generator by closing the appropriate circuit. The
specific choice of RELAY AUX or 12V AUX may depend on the generator’s starting circuitry. Different