Atkinson Electronics GSCM Manuel - Page 15

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Atkinson Electronics GSCM Manuel
Engineering Application Bulletin #2
Outback Inverter Auto Generator Start Using GSCM
The GSCM accepts either as dry contact closer between terminal 5 and 6, or a 12VDC signal from an Outback Inverter's
auxiliary output without requiring a separate 12VDC relay as shown in the Outback Auto Generator Start application. GSCMs
with a date code before May 2004 will still require a 12VDC relay to interface with the Outback Inverter. A remote generator
start switch or manual off auto switch may still be connected to the GSCM along with the Outback Inverter, but it needs to be
connected to the GSCM power terminal as shown in the optional remote switch diagram. When not connected to the Outback
Inverter, the remote start switch may be wired as in application 1 of the GSCM instructions booklet.
When the start signal is received from the Outback Inverter, the GSCM starts the generator with a 3-wire start/ stop or any
other generator starting application to match the type of generator to be controlled. If the user desires, the voltage from the
generator's battery may be connected to the GSCM on terminal 4 and the GSCM will start the generator automatically to
charge its own battery when the voltage falls below the battery cut-in threshold voltage.
The Outback Inverter monitors the battery bank, and provides a start signal when the inverter battery bank needs to be
charged. While charging the inverter passes the AC power from the generator to the inverter's loads. If loads become
unbalanced or exceed the rating of generators output harmonics can occur on the generators AC output causing the GSCM to
see an over Hz condition. If this occurs, it is recommended that an EMI filter be placed in the AC feedback line (GSCM
terminals 13 &14) from the generator (Qualtek Electronics #851-02/ 001). A second option is to disable the over/ under Hz
shutdown monitoring and allow the Outback Inverter to monitor the AC for over/ under Hz. Condition and shutdown the
generator in those conditions.
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15
Circuit Board Division
Revised 09/18