Operation
900-0161-01-01 Rev B
39
Auxiliary Terminals
The Radian inverter has two sets of terminals that respond to different criteria to control certain
operations. The
12V
A
UX
terminals provide a 12 Vdc output that can deliver up to 0.7 Adc to
control external loads. The
R
ELAY
A
UX
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 “
A
UX
output”, it can mean either set of terminals.)
Each
A
UX
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 Radian inverter and accessed using the system display.
The system display and other devices have separate programming, such as Advanced
Generator Start (AGS), that can also control the
A
UX
outputs. To avoid conflicts, the output
should be
Off
when the AGS function is active.
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
A
UX
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
A
UX
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 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
R
ELAY
A
UX
outputs are defaulted to different selections.) These functions are summarized in Table 4
on page 42.
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
A
UX
output is activated after a
settable delay. The
A
UX
output is used to energize a larger external relay (normally open) which
is connected to non-vital loads. The
A
UX
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 inverter’s default output
voltage of 240 Vac, the limit is 210 Vac, or 105 Vac if output L1 or L2 decrease in voltage
independently. (See page 66.) 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
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