Outback Power Systems FLEXmax Extreme Owners Manual - Manual (Page 19)

Installation
900-0150-01-00 Rev A 17
AUX Terminals
The AUX (Auxiliary) output is a small power supply that provides a 12 Vdc output current to an isolated load. The
AUX output can respond to many criteria and control many functions. These include cooling fans, vent fans,
load diversion, fault alarms, and automatic generator control. The AUX can only control one function at a time.
Terminals and are the + and – terminals for the AUX output. These terminals are colored gray (–) and
brown (+) for easy reference. The terminals can supply up to 250 mA at 12 Vdc (3 W). The AUX circuit contains
electronic overcurrent protection, which resets after being overloaded. No additional fuses are required for the
AUX terminals.
The AUX LED illuminates when the output becomes active. (See page 23 for an illustration of LED indicators.)
Figure 13 AUX Vent Fan
Figure 14 AUX Diversion Control
In this example, the AUX output directly drives a
12-volt vent fan. The – and + wires on the fan are
connected to terminals and , the AUX– and
AUX+ terminals .
In this example, the AUX output drives a relay that
diverts wind power. The relay’s coil is connected to
terminals and , the AUX+ and AUX–
terminals. When the AUX output closes the relay
(based on battery voltage), the relay diverts excess
power to a water heating element.
Relay
Element
Turbine
NOTE: Relays and elements shown are examples only and may
vary depending on the installation.