2 — INSTALLATION AND WIRING
pg. 9
1212 & 1212P Manual - Sep 2019
Voltage Throttle
Wiring for a voltage throttle is shown in Figure 5. With this throttle, the controller can be programmed for
a Throttle Type 5–9 input signal;
.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
+
-
VOLTAGE
THROTTLE
Pot Wiper input (Pin 1)
B-
Figure 5
Wiring for Voltage
Throttle.
The PotHigh and PotLow parameters are used to set the voltage range of these throttles. If the pot wiper
voltage is higher than the programmed PotHigh value or lower than the programmed PotLow value, the
controller will issue an out-of-range throttle fault. In order for the controller to be able to detect out-of-range
throttle faults, the throttle must have a range within the limits of 0.4–4.6 V.
Note: If a 0–5V throttle is used, it is the responsibility of the OEM to provide appropriate throttle fault
detection.
Speed Limit Pot / Lift Lockout Input
A speed limit pot allows the operator to adjust the speed of the vehicle at full throttle. The speed limit pot
should be sized so that it does not affect throttle input resistance and thus the throttle response; a 100k
Ω
pot
is recommended.
The speed limit pot is at its maximum speed setting when its wiper is shorted to the throttle’s pot high
connection (Pin 2). When the speed limit pot is in its maximum speed position, the vehicle’s speed at full
throttle corresponds to the programmed maximum speed setting
.
The speed limit pot is at its minimum speed setting when its wiper is shorted to the throttle’s pot low
connection (Pin 8). When the speed limit pot is in its minimum speed position, the vehicle’s speed at full
throttle corresponds to the programmed minimum speed setting. For information on the programmable
speed parameters, see Section 3.
The speed limit pot varies the vehicle’s speed linearly over the range between the minimum and maximum
speed settings in each mode, in forward and in reverse.
If a speed limit pot is not used, the Speed Limit Pot parameter should be programmed Off to disable the
fault check at the speed limit pot.
In 1212P models only,
the same pin (Pin 9) can also take an external lift lockout signal from a Curtis 906 meter
to control the lift lockout driver when lift lockout is triggered. This feature inhibits the speed limit pot input.
