18
Curtis 1230 Manual, Rev. C
2 — INSTALLATION & WIRING: Aux. Drivers & Emergency Reverse
to provide appropriate throttle fault detection. Note: If your Type 4 throttle
has an internal neutral switch, this internal neutral switch should be wired to
the forward switch input (Pin 13). The controller will behave as though no
throttle is requested when the neutral switch is high, and will use the throttle
value when the neutral switch is low.
Three-Step Switch Throttle (“Type 5”)
The three-step switch throttle (“Type 5” in the programming menu) replaces
the proportional throttle with two switches—Speed 1 and Speed 2—that select
between three discrete speeds. The Speed 1 switch is connected to the throttle
wiper input and the Speed 2 switch to the speed limit input.
The Throttle Deadband, Throttle Map, and Throttle Max parameters
are used to define the three discrete speeds. The speed is determined by the
combination of Speed 1 and Speed 2 switches, as shown in Table 2. These three
speeds apply in both forward and reverse.
Table 2 THREE-STEP SWITCH THROTTLE SPEEDS
SPEED 1 SPEED 2 SPEED IS DEFINED
SWITCH SWITCH BY THE VALUE SET
(Pin 6) (Pin 10) FOR THIS PARAMETER
Open Open Throttle Deadband
Closed Open Throttle Map
— Closed Throttle Max
WIRING: Auxiliary Drivers (1230-2X01 MODELS ONLY)
Two auxiliary drivers are provided at Pins 23 and 24. These low side drivers,
depending on how they are programmed (see page 43), can be used for a variety
of functions. Output is rated at 2 amps. An active clamping circuit at 70 V
provides fast turn-off and protects the drivers from inductive voltage kickback
spikes. These outputs are designed to drive solenoids or relays. However, they
can be used to drive any load requiring up to 2 amps maximum current.
WIRING: Emergency Reverse
To implement the emergency reverse feature, the emergency reverse input (J1
Pin 15) must be connected to battery voltage. The emergency reverse input can
be configured to accept normally open or normally closed switches.
Emergency reverse is activated when the vehicle is moving forward and
the emergency reverse switch is pressed. After the emergency reverse switch is
released, normal controller operation is not resumed until neutral (no direction)
is selected or until the interlock switch is cycled. The recommended wiring is
shown in Figures 3–5. The controller decelerates at the programmed fast stop
rate as soon as the emergency reverse switch closes. The vehicle will then be
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