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Electronics / General system
Functional description of sensors and ECU A002
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02.11.2000
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Functional description of sensors and ECU A002
Text-module
Functional description of components with frequency inputs on ECU
Text-module
The enhanced controls ECU A002 delivers a basic signal voltage of 7.3 VDC.
This basic signal voltage is reduced when Hall-effect sensors are connected:
to 1.1 VDC or 5.4 VDC (depending on the ratchet wheel setting) by resistor circuits in the
Hall-effect sensor.
The ECU calculates the rotational frequency of the shaft (rotational speed) from the number of voltage
fluctuations (1.1 VDC and 5.4 VDC).
Text-module
Functional description of components with digital inputs on ECU
Text-module
The enhanced controls ECU A002 delivers a basic signal voltage of 8.0 VDC.
Depending on the position of the switch, the basic signal voltage from the ECU is reduced:
to 2.4 VDC (internal resistance of component 121 ohms) or 5.1 VDC (internal resistance of
component 510 ohms).
The desired function is carried out in the ECU because of the voltage level.
Text-module
Sensors with frequency inputs
B002
Front PTO Hall-effect sensor
B010
Engine Hall-effect sensor 1
B011
Engine Hall-effect sensor 2
B014
Hydrostat speed sensor
B015
Bevel pinion speed sensor
B020
Rear PTO Hall-effect sensor
B021
Rear PTO clutch Hall-effect sensor
Switches and buttons at digital inputs
A003
Joystick, v +
A003
Joystick, mid-position
A003
Joystick, v -
A003
Joystick, activating key
A003
Joystick, rapid reversing
A003
Joystick, cruise control
A003
Operating range Neutral
A003
Speed range I / II
S014
Rapid reversing control
A003
Crossgate lever, mid-position
S019
PTO ON key, rear left
S020
PTO ON key, rear right
B014
Bevel pinion speed sensor / rotational direction
B015
Hydrostat speed sensor