PG Drives Technology SK78814/1, Техническое руководство, Страница: 18 / 24

R-
NET
IOM – I
NSTALLATION
PG D
RIVES
T
ECHNOLOGY
7.2.1 Pin 1 - Joystick speed
This is the joystick signal that determines the forward/reverse component of wheelchair movement. The joystick has a 1.8K Ω
resistor in series with the speed output as shown below. All voltage levels apply to the actual joystick output, i.e. no load values.
The IOM has an input resistance of 100K
Ω
to 0V.
For optimum performance, The IOM should be calibrated for individual joysticks. The voltage swing of 1.2V is a nominal value,
actual values of between 1.1V and 1.3V will be accepted by a calibration sequence.
If the voltage swing with respect to Vpin3 exceeds 3.0V, then the IOM will assume a fault condition.
7.2.2 Pin 2 - Joystick direction
This is the joystick signal that determines the turning component of wheelchair movement. The joystick has a 1.8K
Ω
resistor in
series with the direction output as shown below. All voltage levels apply to the actual joystick output, i.e. no load values. The IOM
has an input resistance of 100K
Ω to 0V.
For optimum performance, The IOM should be calibrated for individual joysticks. The voltage swing of 1.2V is a nominal value,
actual values of between 1.1V and 1.3V will be accepted by a calibration sequence.
If the voltage swing with respect to Vpin3 exceeds 3.0V, then the IOM will assume a fault condition.
7.2.3 Pin 3 - Joystick reference
This is the joystick center point reference. The joystick has a 470
Ω
resistor in series with the reference output as shown below. All
voltage levels apply to the actual joystick output, i.e. no load values. The IOM has an input resistance of 200K
Ω
to 0V.
SK78814/1 18