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Jet 7 www.pridemobility.com 27
VII. OPERATION
VSI ELECTRONIC CONTROLLER
The electronic controller is what you use to operate your power chair. The electronic controller enables you to move the
power chair, as well as monitor battery charge, electronic controller functions, and the condition of your electrical system.
The VSI is an integral electronic controller. All of the electronics necessary to operate the power chair are contained in one
module. See figure 28. Typically, the VSI is mounted to one of the armrests and is connected to the motors, batteries, and
the onboard battery charger at the power base. The VSI may be used to control some optional systems such as power
elevating seats and lights.
The controller supplied with your power chair has been pre-programmed to meet your needs. The program is set using
either a personal computer with software provided by the controller manufacturer or with a hand-held programmer, also
provided by the controller manufacturer.
WARNING! The controller program can affect speed, acceleration, deceleration, and braking. If it
is programmed incorrectly or outside of the safe limits as determined by your healthcare
professional, it can create a dangerous situation. Only the power chair manufacturer, an authorized
representative of the manufacturer, or a trained service technician should program the controller.
Figure 28. VSI Controller
The VSI consists of:
1. joystick
2. keypad
3. off-board charger/programming socket
4. actuator connector (optional)
5. controller connector
6. charger inhibit connector
Joystick
The joystick controls the direction and speed of
your power chair. When you move the joystick
from the neutral (center) position, the electro-
magnetic brakes release and allow your power
chair to move. The farther you push the joystick
from its neutral position, the faster your power
chair moves. When you release the joystick and
allow it to return to the neutral position, you
engage the electromagnetic brakes. This causes
your power chair to decelerate and come to a
complete stop.
WARNING! If your power chair begins to move in an unexpected manner, immediately release the
joystick. Unless the joystick is damaged, this action should stop your power chair.
Keypad
The keypad is located in front of the joystick. It contains keys necessary to operate your power chair. See figure 29.