Wiring: Throttle; Table 1: Voltages At Throttle Wiper Input - Curtis 1244 User Manual

2 — INSTALLATION & WIRING:
Table 1 THROTTLE WIPER INPUT: THRESHOLD VALUES
THROTTLE
TYPE PARAMETER
1
Wiper Voltage
Wiper Resistance
2 Wiper Voltage
Wiper Resistance
3
Wiper Voltage
Wiper Resistance
4
Wiper Voltage
Wiper Resistance
5 Wiper Voltage
Wiper Resistance
Notes: The Upper and Lower Deadbands are valid for nominal 5kΩ potentiometers or 5V sources with the
default Throttle Deadband and Throttle Max parameter settings of 0% and 100% respectively. These
values will change with variations in the Throttle Deadband and Throttle Max parameter settings—see
Section 3, pages 30 and 32.
The HPD threshold is a percentage of the active throttle range, which is dependent on the pro-
grammed Throttle Deadband and Throttle Max settings. The default HPD Threshold is 25%; the
programmable range is 0–25%.
* With 0% Throttle Deadband, there is no neutral point on a Type 4 throttle. It is recommended that
an 8% minimum deadband be used with Type 4 throttles.
10
Throttle

WIRINg: Throttle

Various throttles can be used with the 1244 controller. They are categorized
as one of five types in the programming menu of the handheld programmer.
Type 1: two-wire 5kΩ–0 throttles
Type 2: 0–5V throttles, current source throttles, three-wire potentiometer
throttles, and electronic throttles—wired for single-ended operation
Type 3: two-wire 0–5kΩ throttles
Type 4: 0–5V and three-wire potentiometer throttles—wired for wig-
wag-style operation
Type 5: CAN-Nodes throttles
The operating specifications for these throttle types are summarized in Table 1.
MINIMUM THROTTLE
THROTTLE DEADBAND
FAULT (0% throttle)
0.1 V 3.3 V
— 5.0 kΩ
(none) 0.2 V
— —
0.1 V 0.2 V
— 0 kΩ
0.5 V 2.5 V (fwd)*
2.5 V (rev)*
0.5 kΩ 2.5 kΩ (fwd)*
2.5 kΩ (rev)*
N/A N/A
N/A N/A
All throttle fault protection is accomplished by monitoring the wiper input.
This provides throttle fault protection that meets all EEC requirements. Thus,
no additional fault protection is required on any throttle type used with the
1244 controller.
HPD THROTTLE
(25% throttle MAX
active range) (100% modulation)
1.0 V 0.2 V
3.8 kΩ 0 kΩ
1.4 V 5.0 V
— —
1.0 V 3.3 V
1.3 kΩ 5.0 kΩ
3.1 V (fwd) 4.4 V (fwd)
1.9 V (rev) 0.6 V (rev)
3.1 kΩ (fwd) 4.4 kΩ (fwd)
1.9 kΩ (rev) 0.6 kΩ (rev)
N/A N/A
N/A N/A
Curtis 1244 Manual,
MAXIMUM
THROTTLE
FAULT
4.4 V
7.5 kΩ
5.5 V
—
4.4 V
7.5 kΩ
4.5 V
4.5 kΩ
N/A
N/A
Rev. E