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Flow sensor:
Hardi P/N
72117500
Type:
Inductive
Range:
On, 0,2-0,5 V
Off, 6,5-7,0 V
Visual indicator:
Red light at Off (0,8V)
Power:
12V
Hardi Pin assignment:
Brown +
Blue signal
Black
-
Pressure sensor:
Hardi P/N
842022
Type:
Pressure
Range:
0-10 Bar
Signal:
4-20mA
Power supply:
8-30V
Hardi pin assignment:
Brown +
Blue
Signal
Black
N/C
Speed sensor for Tractor: Wheel, gearbox or radar
The HC5500 can have several different kinds of speed sensors. It can have an inductive
sensor mounted on the back wheel, the same sensor as on the trailed sprayers, or it can be
connected to the tractors speed sensor, in the gearbox, or radar.
The sensors are connected to the HC5500 through wire harness on
Picture
5.
The signal from the tractor or the radar must be between 0 - 5 Volt and below 2,000 Hz.
Most radar’s have this signal range.
The signal from the tractors can however change a lot from brand to brand; consult your
manual or tractor dealer for more information.
The setup of the speed sensors in the HC5500 is done in the menu 3.1. Further instructions
about the connection and calibration can be found in the instruction book.
Pressure sensor
An optional 4 to 20 mAmp pressure sensor can be fitted to the liquid system.
With the sensor, the controller can switch to pressure based regulation when the flow drops
below the minimum rate measurable by the flow meter. Preventing LookAhead from winding
the pressure regulation valve down too far when driving very slowly.
In menu E8.1.7 the sensor has to be set to “Active”.
The sensor can be set for a minimum pressure. If the pressure drops below the set value,
pressure regulation stops.
The HC5500 has min and max pressure alarm that will be shown in the display menu.
The cable is connected to the “PCB for section valves”.
