Curtis 1228 Manual, Rev. F
3
✓ Power saver deactivates the main relay after 25 seconds of non-
operation and deactivates the entire controller after the programmed
sleep delay has elapsed
✓ BDI output can be used to provide data to a voltmeter; the BDI
output can be “stuffed” (optional) in order to display the battery state
of charge during battery charging even while the keyswitch is turned
off
✓ Undervoltage cutback function protects against operation at low
battery voltage
✓ Overvoltage protection shorts the motor and disables driving in the
event of excessive battery voltage
✓ Thermally protected
✓ Reverse polarity protected (battery input)
Familiarity with your Curtis controller will help you install and operate it prop
-
erly. We encourage you to read this manual carefully. If you have questions,
please contact the Curtis office nearest you.
1 — OVERVIEW
Working on electric vehicles is potentially dangerous. You should pro-
tect yourself against runaways, high current arcs, and outgassing from lead
acid batteries:
RUNAWAYS — Some conditions could cause the vehicle to run out of control.
Disconnect the motor or jack up the vehicle and get the drive wheels off the
ground before attempting any work on the motor control circuitry. Note:
If the wrong combination of throttle and switch styles is selected with the
programming device, the vehicle may suddenly begin to move.
HIGH CURRENT ARCS — Electric vehicle batteries can supply very high power,
and arcs can occur if they are short circuited. Always open the battery circuit
before working on the motor control circuit. Wear safety glasses, and use
properly insulated tools to prevent shorts.
LEAD ACID BATTERIES — Charging or discharging generates hydrogen gas,
which can build up in and around the batteries. Follow the battery man
-
ufacturer’s safety recommendations. Wear safety glasses
.
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