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30 www.pridemobility.com Jazzy 1170 XL Plus
VII. OPERATION
VSI CONTROLLER
The electronic controller is what you use to operate your power chair. It takes the battery voltage and sends it to
the appropriate system. 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 controller is an integral
electronic controller. All of the electronics necessary to operate the power chair are contained in one module. See
figure 20. Typically, the VSI is mounted to one of the armrests and is connected to the motors, batteries, and the
onboard battery charger on the power base.
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 20. VSI Controller
The VSI consists of:
1. joystick
2. keypad
3. off-board charger/programming socket
4. actuator connector
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 (cen-
ter) position, the electromagnetic brakes release and allow
your power chair to move. The farther you push the joy-
stick 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
21.