Curtis 1214-/15-/19-8 Manual
11
3-Wire Potentiometer (500
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 controller. Pot High provides a current-
limited 5V source to the potentiometer, and Pot Low provides the return path.
Wiring is shown in Figure 9.
2 — INSTALLATION & WIRING
Fig. 9
Wiring for 3-wire
potentiometer throttle
(“Type 2”).
As with the 2-wire throttles, broken wire protection is provided by the
controller looking for a minimum current into the Pot Low pin. If the Pot Low
input current falls below 0.1 mA, a throttle fault is generated and the controller
is disabled.
NOTE
: The Pot Low pin (Pin 14) must not be tied to ground.
14
13
15
16
17
18
19
20
21
22
23
24
12
11
10
9
8
7
6
5
4
3
2
1
OFF
ON
500
Ω
–10k
Ω
Pin 15
Pin 14
Pin 13
Pot Wiper
Pot Low
Pot High
PIN KEY
Fig. 8
Wiring for 0–10V
throttle (“Type 2”).
(b) 0–10V throttle sensor
(a) Ground-referenced 0–10V throttle
14
13
15
16
17
18
19
20
21
22
23
24
12
11
10
9
8
7
6
5
4
3
2
1
14
13
15
16
17
18
19
20
21
22
23
24
12
11
10
9
8
7
6
5
4
3
2
1
SENSOR OUTPUT
SENSOR GROUND
0–10V
SENSOR
+
+
-
B-
4.7 k
Ω
Pin 14
Pin 13
Pin 5
Pot Low
Pot High
0–10V Input
PIN KEY
PIN KEY
Pot Low
0–10V Input
Pin 14
Pin 5
