Fig. 7 Wiring For 3-Wire Potentiometer Throttle ("Type 2"); Fig. 8 Wiring For Current Source Throttle ("Type 2") - Curtis 1244 User Manual

Fig. 7 Wiring for 3-wire
potentiometer throttle
("Type 2").
Fig. 8
Wiring for current
source throttle ("Type 2").
Curtis 1244 Manual,
Rev. E
3-Wire Potentiometer (1k Ω –10k Ω ) Throttle
The 3-wire potentiometer is used in its voltage divider mode, with the voltage
source and return being provided by the 1244 controller. Pot High (Pin 13)
provides a current limited 5V source to the pot, and Pot Low (Pin 14) provides
the return path. The pot wiper is then connected to the Wiper Input (Pin 15).
If a 3-wire pot is used in the application, the controller will provide full throttle
fault protection in accordance with EEC requirements. Potentiometers with total
resistance values between 1kΩ and 10kΩ can be used with Throttle Type 2.
Wiring is shown in Figure 7.
1kΩ–10kΩ
ON OFF
Current Sources As Throttles
A current source can also be used as a throttle input, as shown in Figure 8. A
resistor, R , must be used to convert the current source value to a voltage.
throttle
The resistor should be sized to provide a 0–5V signal variation over the full
current range.
R
I
source
throttle
B- B-
2 — INSTALLATION & WIRING: Throttle
24 23 22 21 20 19 18
12 11 10 9 8 7
24 23 22 21 20 19 18
12 11 10 9 8 7 6
17 16 15 14 13
6 5 4 3 2 1
PIN KEY
Pot Wiper
Pin 15
Pot Low
Pin 14
Pot High
Pin 13
17 16 15 14 13
5 4 3 2 1
PIN KEY
Pin 15 0–5V Input
13