The GenCon monitors the generator cranking battery from this terminal.
 

E5 and E6 are the floating inputs for the variable-reluctance Flywheel Sensor. The Flywheel Sensor, which is mounted on the bell housing of the generator engine, produces a signal as the flywheel teeth pass in proximity. The housing of the sensor is grounded via the engine bell housing,
 

E7 is the power ground return for the GenCon controller board.
 

Terminals E8 and E9 are the switch and ground return terminals for the Auto position of the Mode switch. When 12 volts is applied to terminal E8, the GenCon starts the generator. When 12 volts is removed from terminal E8, the GenCon stops the generator. The Auto-start Mode switch (E8) allows the operator to start and stop the generator on-demand.
 

Terminals E10 and E11 are the switch and ground return terminals for the Monitor position of the Mode switch. When 12 volts is applied to terminal E10, the GenCon monitors the cranking and house batteries and shore power. If the GenCon senses that generator power is needed it will start the generator.
 

Terminals E12 and E13 are the switch and ground return terminals for the Normal / Power down input. When power is removed from this input the GenCon begins an orderly shutdown of the generator. Terminal E12 has many uses. Typically it is used as a safety feature to force a generator shutdown when the generator service tray is extended from the coach. This requires a proximity switch to be installed on the generator service tray to detect the extension of the tray.
 

E14 and E15 are the Preheat Relay contacts which will close when the GenCon is preparing the diesel generator engine for starting.
 

E16 and E17 are the generator cranking relay contacts; they close to engage the generator engine starter.
 

E18 and E19 are the Stop Relay contacts which close for ten seconds when the generator engine is to be stopped.
 

E21 and E22 are relay contacts making a parallel connection with the Auxiliary relay, which hold power on the GenCon for an orderly shutdown when the Auxiliary relay opens. This keeps the GenCon powered up long enough to allow the GenCon to perform an orderly shutdown of the generator even though the Auxiliary relay has been opened thus cutting power to the GenCon.
 

E23 and E24 connect the generator cranking battery to E4 when the GenCon is powered up. These contacts open after the GenCon performs an orderly generator shut-down, completely isolating the GenCon from the generator starting battery, precluding even a minute current drain on the generator cranking battery when the coach is in storage.
 

When 12 volts is applied to terminal E25, the GenCon will monitor shore power for brown-out conditions. When 12 volts is removed from terminal E25, the GenCon will no longer monitor shore power.

Note: Always turn the shore power brown-out detection off before unplugging the coach from shore power to avoid false brown-out detection and unnecessary generator starts.
 

The GenCon monitors shore power from this connection. This dc voltage is proportional to the shore power ac voltage and is used to detect shore power brown-out conditions. This voltage is provided by a Radio Shack power adapter plugged into a duplex outlet wired after the shore-power circuit breaker and before the first transfer switch.

We cannot stress this enough! The Radio Shack power adapter must be plugged into a duplex outlet wired after the shore-power circuit breaker and before the first transfer switch.

Failure to tap into the shore power circuit at the point between the shore-power circuit breaker and the first transfer switch will prevent the GenCon from detecting shore power brown-out conditions.

Note: The GenCon is calibrated to a specific Radio Shack power adapter. If the Radio Shack power adapter is replaced, the GenCon must be returned to Westhaver Associates with the new Radio Shack power adapter for recalibration.

The Radio Shack power adapter must be configured so that the tip of the connector is positive and the outer barrel of the connector is negative. Improper polarity will cause damage to the GenCon circuit board.