2 — INSTALLATION AND WIRING
1212 & 1212P Manual - Sep 2019
pg. 8
THROTTLE WIRING
Either a 3-wire potentiometer throttle or a voltage throttle can be used with the 1212/1212P controller.
The controller can accept a single-ended, inverse single-ended, wigwag, inverse wigwag, or unipolar
input signal from the throttle, depending on how the Throttle Type parameter is programmed;
.
Throttle wiring is described in the following text. If the throttle you are planning to use is not covered,
contact the Curtis office nearest you.
5kΩ, 3-Wire Potentiometer
A 5k
Ω
, 3-wire potentiometer is shown in the wiring diagrams (Figures 3a and 3b) as well as in
Figure 4. With this throttle, the controller can be programmed for a Throttle Type 0–4 input signal;
.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Figure 4
Wiring for 3-Wire,
5K
Ω
Potentiometer
Throttle.
For wigwag, inverted wigwag, and unipolar applications, the pot can be correctly centered within the
controller’s neutral band by using the throttle autocalibration feature (
The controller provides full pot fault protection against open or shorted wires anywhere in the
throttle assembly. The overall pot resistance should be 4.3 to 7.0 kΩ. Values outside this range will
trigger a fault condition. If a pot fault occurs while the vehicle is moving, the controller will decelerate
the vehicle to a smooth stop using the decel rate set by the Key Off Decel parameter. If the fault is
corrected while the throttle is still applied, an HPD fault will be issued and driving is disabled until
throttle is reduced to neutral.
