Installation Guide

Installation
900-0168-01-00 Rev C 27
Generator Control
The AUX terminals can provide a signal to control an automatic-start generator. The control function
can be
Advanced Generator Start
(AGS), which is situated in the system display. AGS can start the
generator using settings from the system display, or it can use battery readings from the FLEXnet DC
battery monitor. Alternately, the control function can be
Gen Alert
, which is a simpler function based
directly in the FXR inverter. The choice of control function depends on system needs and the
capabilities of each device.
The generator must be an electric-start model with automatic choke. It is recommended to have
“two-wire” start capability. A two-wire-start generator is the simplest type, where the cranking and
starting routine is automated. It usually has a single switch with two positions that is turned ON to
start, OFF to stop.
Two-Wire-Start
The 12 Vdc signal provided by the
AUX
output can be switched on and off to provide a start signal. It
is possible to send a 12-Vdc signal directly to the generator. However, this should never be done if it
connects the
AUX
output directly to the generator’s own battery. It is more common to use the
AUX
terminals to energize the coil of a 12 Vdc automotive or similar relay.
The OutBack FLEXware Relay Assembly depicted in Figure 19 is sold for this purpose. The relay contacts
can serve in place of the generator’s start switch. The battery shown below is depicted for clarity. In
most cases, it is part of the generator’s internal starting circuit and is not an external component.
The drawing below is one example of a possible arrangement. Specific arrangements, relays, and
other elements depend on the requirements of the installation and of the generator.
Figure 19 Two-Wire Generator Start (Example)
Starting
Terminal
Generator
Battery
Relay
Contact
Relay
Coil
Two-Wire-Start
Generator
1
1