On-Highway Vehicles
General
This applies to all on-highway vehicles, such as motorcycles and cars.
The installer must ensure an appropriate controller configuration is set to ensure that the vehicle
remains in a safe condition, even in the event of a fault.
Inputs
Always ensure drive inputs have adequate protection. Inputs such as the throttle should have
appropriate wire-off detection configured. Single point failures should never cause an unsafe
condition.
Gen4 supports wire-off detection on all analogue inputs, and it contains various safety interlocks
to prevent unexpected drive due to a wiring fault (e.g. FS1 switch, dual throttle inputs).
Sevcon recommends that the following features are enabled for all applications:
• Wire-off detection on analogue inputs, particularly the throttle.
• A valid analogue input voltage which is more than 0.5V from wire off limits
• Appropriate safety interlocks to ensure a single point of failure cannot cause an
unsafe driving condition.
Refer to sections Analogue inputs (page 6-14) and Vehicle performance configuration (page 6-
18) for more information.
Notes on Features
The Gen4 is a generic motor controller intended for use in both highway AND non-highway
industrial applications. Not all of the controller features are suitable for an on-highway vehicle.
Some features, if activated, could lead to the controller forcing a motor condition that is not
directly requested by the throttle, such as undesired drive or harsher than expected braking.
Sevcon recommends that the following features are DISABLED for any on-highway applications:
• Proportional Speed Limit
1
.
• Hill Hold
1
.
• Controlled Roll-Off
1
.
• Speed mode (or speed control)
1
.
• Electromechanical Brake output
1
.
• Inching
2
.
• Belly switch
2
.
• Unused Driveability Profiles
3
.
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