Quantum Dynamo
www.quantumrehab.com
33
V I I . O P E R A T I O N
VSI 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 electronic controller is an integral electronic controller. All of the electronics necessary to operate the power chair
are contained in one module. See figure 26. Typically, the VSI is mounted to one of the armrests and is connected to the
motors, batteries, and the onboard 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. But
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 autho-
rized representative of the manufacturer, or a trained service technician should program the
controller.
The VSI consists of:
1. joystick
2. keypad
3. off-board charger/programming
socket
4. actuator connector (optional)
5. controller connector
6. 3-pin 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 electromagnetic brakes release and al-
low your power chair to move. The farther
you push the joystick from its neutral posi-
tion, 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 27.
Figure 26. VSI Controller