Filter
Top Products
22
AUX MODE
The AUX is a secondary control circuit—essentially, a small power supply that provides a 12 VDC (up to
200 milliamps) output current. It is either active (12 VDC on) or inactive (12 VDC o ).
• To access the AUX MODE from the MAIN Menu, press the < >soft key until the asterisk is in front of
the AUX selection.
• A 200 milliamps or less, 12 VDC device can be wired directly to the AUX terminal; higher output DC
loads require a 12 VDC coil relay—also rated up to 200 milliamps or less for the DC coil—which itself
is connected to the AUX output. An internal, re-settable Positive Temperature Coe cient (PTC) fuse
protects the AUX internal components.
• For certain AUX control applications the use of a solid state relay is preferred. This is particularly
bene cial with applications such as the Diversion mode where fast switching (often called PWM
control) allows a more constant battery voltage to be maintained. Both DC and AC load switching
solid state relays are widely available from many sources. Eurotherm and Power-IO are two suggest-
ed solid state relay manufacturers.
• Most AUX modes or functions are designed for specialized applications and are infrequently used.
• Only one AUX MODE can operate at a time (even if other modes have been preset).
• Press the <EXIT> soft key to initiate the chosen AUX MODE.
• See Figure 5, page 30, for an AUX set-up wiring diagram.
In this Menu, ON and
OFF indicators show the
present state of the Aux
terminals. Pressing the
<ON> or <OFF> soft key
changes this value.
ON indicates 12 VDC is
present at the Aux output
terminals. OFF indicates
0 VDC.
The second line indicates
the present mode for the
Aux Output.
When the preferred mode
is displayed, press the
<EXIT> soft key to select it.
Pressing the <NEXT> soft key
changes to the next mode.
Terms
• AUX MODE: what is displayed on the Menu
• Aux Output: 12 VDC is either available or unavailable at the Aux Terminal
• Aux Terminal: the jack to which a relay is wired
AUX MODE
Manual
Off
EXIT NEXT ON OFF