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C A U T I O N
Curtis PMC 1204X/1205X/1209/1221 Manual
Fault detection circuitry monitors battery, throttle connections, output
transistors, bypass contactor, etc., to prevent runaway conditions
Static return to off (SRO) function requires that forward or reverse selectors
be returned to neutral before output is allowed [optional feature]
Emergency reverse enhances plugging current when "belly-button" is acti-
vated on walkie-type applications [optional feature]
Delayed bypass (1A) output drives a bypass contactor [optional feature]
Forward, reverse, and bypass contactor driver outputs are internally pro-
tected against shorts in the contactor coils
Simple installation with no adjustments required
Tin-plated solid copper bus bars
Push-on connectors for control wiring
Familiarity with your Curtis PMC controller will help you to install and operate
it properly. We encourage you to read this manual carefully. If you have
questions, please contact the Curtis office nearest you.
Working on electric vehicles is potentially dangerous. You should protect
yourself against runaways, high current arcs, and outgassing from lead acid
batteries:
— Some fault conditions could cause the vehicle to run out of
RUNAWAYS
control. Jack up the vehicle and get the drive wheels off the ground before
attempting these procedures or any other work on the motor control
circuitry.
— Electric vehicle batteries can supply very high power,
HIGH CURRENT ARCS
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
which can build up in and around the batteries. Follow the battery
manufacturer's safety recommendations. Wear safety glasses.
— Charging or discharging generates hydrogen gas,
OVERVIEW
2
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