Segway p Series, User Manual, Page: 14 / 52

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> Battery Packs
The two Battery Packs are sealed units that require no
maintenance besides proper charging and storage.
Either Battery Pack can be installed in the front or back
of the Platform. Both Battery Packs must be of the
same chemistry (for example, you cannot mix one
NiMH Battery Pack with one Li-ion Battery Pack).
Li-ion Battery Packs are larger than NiMH Battery
Packs. If either Battery Pack fails, the Segway HT will
perform a Safety Shutdown.
> Balance Sensor Assembly
The Balance Sensor Assembly contains five angular
rate sensors (solid state gyroscopes) and two tilt
sensors. These sensors gather information about the
orientation of the Platform in all three planes (pitch,
roll, and yaw). This information is sent to the Controller
Boards. All five of the rate sensors are constantly
checking each other to ensure each is operating
correctly. The two tilt sensors check each other in the
same manner. If any of these sensors fails, the
Segway HT will perform a Safety Shutdown.
> Handlebar Electronics
The Handlebar contains redundant communication
systems and redundant sensors in the Steering Grip
and Mode Button. If there is a malfunction in either the
Steering Grip or Mode Button sensors, or any of the
other electronics in the Handlebar, the Segway HT will
perform a Safety Shutdown. Each system in the
Handlebar communicates information to the Controller
Boards via an independent Control Shaft Cord. If either
cord malfunctions, the Segway HT will perform a Safety
Shutdown.
For information about Safety
Shutdown, see page 17.