10
Curtis 1207B Manual
WIRING: Throttle
Wiring for various throttles is described below. They are characterized as Type 1,
Type 2, and Type 3 throttles in the programming menu of the handheld pro-
grammer. Note: In the text, throttles are identified by their nominal range
and not by their actual active range.
If the throttle you are planning to use is not covered, please contact the
Curtis office nearest you.
5k
Ω
–0 Throttle (“Type 1”)
The 5k
Ω
–0 throttle (called a “Type 1” throttle in the programming menu of
the handheld programmer) is a 2-wire resistive throttle that connects between
the 5k
Ω
–0/0–5k
Ω
pin (Pin 8) and the Pot Low pin (Pin 7), as shown in Fig-
ure 5. It doesn’t matter which wire goes on which pin. Zero speed corresponds
to 5k
Ω
and full speed corresponds to 0
Ω
.
Fig. 5
Wiring for
5k
Ω
–0 throttle
(“Type 1”).
In addition to accommodating the basic 5k
Ω
–0 throttle, the Type 1
throttle is the easiest with which to implement a wigwag-style throttle. Using
a 20k
Ω
potentiometer wired as shown in Figure 6, the pot wiper can be set
such that the controller has 5k
Ω
between Pins 7 and 8 when the throttle is
in the neutral position (i.e., at the center of the pot). The throttle mechanism
can then be designed such that rotating it either forward or back decreases the
resistance between Pins 7 and 8, which increases the controller output. The
Fig. 6
Wiring for 20k
Ω
potentiometer used as a
wigwag-style throttle
(“Type 1”).
2 — INSTALLATION & WIRING
8
7
6
5
4
3
2
1
FASTER
16
15
14
13
12
11
10
9
5k
Ω
POT
Pin 8
Pin 7
5k
Ω
–0
Pot Low
PIN KEY
8
7
6
5
4
3
2
1
FASTER
FASTER
16
15
14
13
12
11
10
9
20k
Ω
POT
Pin 8
Pin 7
5k
Ω
–0
Pot Low
PIN KEY
