Manual

33
Curtis PMC 1207/1207A Manual 26
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
programmer.
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.
5kΩ–0 Throttle (“Type 1”)
The 5kΩ–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
2 A — INSTALLATION & WIRING: 1207A Controller
Fig. 5A Wiring for
5k
Ω –0 throttle
(“Type 1”).
87654321
FASTER
16 15 14 13 12 11 10 9
5kΩ POT
Pin 8
Pin 7
5kΩ–0
Pot Low
PIN KEY (1207A)
5kΩ–0/0–5kΩ pin (Pin 8) and the Pot Low pin (Pin 7), as shown in Figure 5A.
It doesn’t matter which wire goes on which pin. Zero speed corresponds to 5kΩ
and full speed corresponds to 0Ω.
In addition to accommodating the basic 5kΩ–0 throttle, the Type 1 throttle
is the easiest with which to implement a wigwag-style throttle. Using a 20kΩ
potentiometer wired as shown in Figure 6
A, the pot wiper can be set such that the
controller has 5kΩ 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
Fig. 6A Wiring for 20k Ω
potentiometer used as a
wigwag-style throttle
(“Type 1”).
87654321
FASTERFASTER
16 15 14 13 12 11 10 9
20 kΩ POT
Pin 8
Pin 7
5kΩ–0
Pot Low
PIN KEY (1207A)