PG DRIVES TECHNOLOGY
33
CHAPTER 2 - INSTALLATION
SK77898/2
5.4 Motor Wiring
In order to detect the disconnection of a motor while the wheelchair is in motion,
the brake current must pass through the same connectors as the motor current, so
that disconnection of either motor will interrupt the brake circuit and trip the control
system. Refer also to section 5.5.
When the control system is starting up or standing by, it is able to detect a
disconnected motor or a short circuit between a motor connection and either battery
supply. With the TruCharge battery gauge, the number of flashing bars indicates the
type of trip.
Auxiliary switches will disconnect the brake circuit if either circuit breaker operates. In
this way the control system can detect that the motor has been disconnected and
stop the wheelchair. Should the motor be put into a stalled condition, the timed
current foldback facility in the control system can also be used to offer some level of
motor protection.
5.5 Solenoid Brake Wiring
The control system will be immobilized instantly if the brake current is less than
approximately 100mA.
• The maximum continuous current is 1A.
The VR2 control system can be programmed to operate with either 12 or 24V brakes.
Refer to Chapter 3 for programming details.
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