
February 2017
www.farmscanag.com
AM-74V1-4
17
Explanation of Components
SECTION VALVES
(Farmscan Ag Part # AH-602/G)
The section valves are controlled by the on-screen widget or smart switch box
switches to provide partial or complete shutdown of the spray boom sections.
3 wire motorised valves:
+12V = Red, Black = Negative, Colour = Trigger
2 wire solenoid valves:
+12V = Unused, Black = Negative, Colour = Trigger
NOTE:
2 wire motorised section valves require an inline adapter (Farmscan Ag
Part Number # A-2091) to reverse the polarity when switching from ‘on’ to ‘off’.
SECOND SPRAY LINE (OPTIONAL)
A second spray line is activated automatically when the first spray line reaches a pre-set maximum
pressure or speed, thereby allowing greater flexibility in working speeds and additional capacity to change
rates on the go.
The second spray line can be activated at a pre-set speed (equivalent to the first spray line reaching
maximum pressure), when using the optional pressure sensor, the second spray line is activated at a pre-
set pressure or by flow (refer to the maximum litres/min your nozzles can maintain)
Using pressure activation (e.g. 300kpa/43psi) avoids the need to change the set activation point when
changing rates.
When using speed-based activation, the second spray line must be fitted with the same size nozzles as the
first spray line. Choose nozzles suitable to achieve target rates at lower working speeds then allow double
the maximum speed or rate to calculate the full operating range.
When using pressure-based activation, you can choose single step or multi step operating mode:
With single step operation, fit the same size nozzles in both the first and second spray line as above.
With multi step operation, the first spray line is fitted with nozzles one size smaller than the second
spray line. The controller will automatically select first, second or both spray lines to maintain
operation within the desired pressure range.
NOTE:
When choosing to use 2
nd
Line control you must purchase the AC-7410 (10 section harness) to
ensure enough outputs are available. Please contact Farmscan Ag Support to discuss your options.