Fig. 10: Wiring For 0-5Kω Throttle ("Type 3") - Curtis 1244 User Manual

Fig. 10 Wiring
for 0–5k Ω throttle
("Type 3").
Curtis 1244 Manual,
Rev. E
0–5kΩ Throttle ("Type 3")
The 0–5kΩ throttle ("Type 3" in the programming menu) is a 2-wire resistive
throttle that connects between the 2-Wire Pot and Pot Low pins (Pins 16 and 14)
as shown in Figure 10. Zero speed corresponds to 0Ω measured between the two
pins and full speed corresponds to 5 kΩ. This throttle type is not appropriate
for use in wigwag-style applications.
FASTER
0–5kΩ
If the total resistance between Pins 14 and 16 is greater than 7.5 kΩ, the
controller's 4.4 V upper fault limit will be exceeded and the controller output
will be disabled. This provides broken wire protection, and also serves as an
indication that the potentiometer's nominal value has increased and the pot
needs to be replaced.
0–5V and 3-Wire Potentiometer Wigwag-Style Throttles ("Type 4")
With these throttles ("Type 4" in the programming menu) the throttle can be
used in true wigwag style. Any potentiometer value between 1 kΩ and 10 kΩ
is supported. If a 5kΩ potentiometer is used, the neutral point will be with the
wiper at 2.5 kΩ (measured between the Pot Wiper and Pot Low pins [Pins 15
and 14]). The controller will provide increasing speed in the forward direction
as the wiper is moved toward Pot High, with maximum forward speed reached
at 4.5 kΩ. The controller will provide increasing speed in the reverse direction
as the wiper is moved toward Pot Low, with maximum reverse speed reached
at 0.5 kΩ.
A 0–5V voltage source can also be used as the wiper input (see Figure 6).
However, the minimum and maximum wiper voltage must not exceed the 0.5V
and 4.5V fault limits.
With a Type 4 throttle, no direction signals to the controllers' forward and
reverse inputs are required. Direction is determined by the wiper input value.
The throttle interface to the controller is similar to that for Type 2 throttles.
2 — INSTALLATION & WIRING:
24 23 22 21 20 19 18
12 11 10 9 8 7 6
Throttle
17 16 15 14 13
5 4 3 2 1
PIN KEY
2-Wire Pot
Pin 16
Pot Low
Pin 14
15