Outback Power Systems FLEXmax Extreme Owners Manual - Manual (Page 22)

Installation
20 900-0150-01-00 Rev A
continuity. The External Fault circuit will detect this loss immediately and shut down the the controller. The red
Fault LED indicator will illuminate. See pages 24, 32, and 61.
Other possible uses for the External Fault terminals include devices such as arc fault protection, or an Emergency
Power Off (EPO) switch for a fast manual shutdown. Any device with normally open contacts can work with this
function. If more than one device is used, all contacts must be wired in series so that any one device will shut
down the controller.
Figure 17 Two Charge Controllers with PV Array Ground Fault Protection
In Figure 17, a wire has been run from terminal on Charge Controller A to one of the dedicated GFDI
terminals. A wire has also been run from terminal to the other side of the GFDI.
In addition, Terminal on Charge Controller A has been connected to terminal on Charge Controller B.
Similarly, Terminal on Charge Controller A has been connected to Terminal on Charge Controller B. This
places the External Fault circuits on both controllers in parallel.
As long as the GFDI remains closed, that pole of the GFDI will read as electrically continuous to the External Fault
circuit on both controllers. In the event of a ground fault or any other condition which trips the GFDI, these
terminals will register loss of continuity. The External Fault circuit on both controllers will detect this loss
immediately. Both controllers will shut down and display the red Fault LED indicator. See pages 24, 32, and 61.
To reset the controller after an external fault:
1. Remove all sources of power (PV and battery) from the controller.
2. Correct the cause of the fault condition.
3. Follow the power-up procedure on page 21.