80 Xanbus Automatic Generator Start (AGS) Owner’s Guide
Appendix A: Generator Auto Start Requirements and Types
Two Wire
The two-wire type is suitable for generators that are fully automatic. This
merely requires two wires to be connected together for the generator to start
and run. Separating the wires stops the generator.
Some generators use a momentary two-wire connection for starting and
stopping.
Identification
Generators of this type are usually operated with a simple toggle switch or
key that turns to on, then off to shut the generator off.
Connection
For this type of generator, the two wires are connected to the normally open
and common contacts of Relay 1 (wires 14 and 16). When the AGS receives
a command to start the generator, it closes the contacts inside Relay 1,
allowing the generator to start. The contacts remain closed for the duration
of the generator run and open when the AGS needs the generator to stop.
Three-Wire Onan
The three-wire “Onan” starting type is suitable for generators that are not as
automated as the two-wire type. It requires a minimum of three wires: a
common wire, a start wire and a stop wire. You may also need to connect
the glow plug wires to Relay 1 (wire 14) or Relay 3 (wire 19). If the
generator requires independent control of the glow plugs, power may also
need to be run to Relay 3 (wire 20).
Identification
Generators of this type are controlled with a three-position switch that is
normally in a center (or neutral) position. To start the generator, the switch
is pressed and held to the start position until the generator starts. The switch
is then released, and it returns to the center position. To stop the generator,
the switch is pressed and held to the stop position until the generator stops.
Again, releasing the switch returns it to the center position.
Connection
The common wire from the generator should connect to the common
connections of both Relay 1 and Relay 2 (wires 16 and 18 respectively).
The start wire from the generator connects to the normally open contact of
Relay 2 and the generator stop wire connects to the normally open contact
of Relay 1.
