Curtis Instruments MultiMode 1230, Manual, Page: 20 / 70

14 Curtis 1230 Manual,
Rev. C
2 — INSTALLATION & WIRING: Throttles
Table 1 THROTTLE WIPER INPUT THRESHOLD VALUES
MINIMUM THROTTLE THROTTLE MAXIMUM
THROTTLE THROTTLE DEADBAND MAX THROTTLE
TYPE PARAMETER FAULT (0% speed request) (100% modulation) FAULT
1
Wiper Voltage
5.00 V 3.80 V 0.20 V 0.06 V
Wiper Resistance
7.50 k
Ω
5.50 k
Ω
0 k
Ω
—
2
Wiper Voltage
0.06 V 0.20 V 5.00 V 5.30 V
Wiper Resistance
— — — —
3
Wiper Voltage
0.06 V 0.20 V 3.80 V 5.00 V
Wiper Resistance
— 0 k
Ω
5.50 k
Ω
7.50 k
Ω
4
Wiper Voltage
0.50 V 2.50 V
(Fwd)
*
4.40 V
(Fwd)
4.50 V
2.50 V
(Rev)
* 0.60 V
(Rev)
Wiper Resistance
— — — —
Notes: The upper and lower deadbands are valid for nominal 5k
Ω
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 DB and Throttle Max
parameter settings—
see Section 3, pages 28 and 29.
*
With 0% Throttle Deadband, there is no neutral point on a Type 4 pot. It is recommended
that an 8% minimum deadband be used with Type 4 throttles.
WIRING: Throttles
Various throttles can be used with the 1230 controller. They are categorized as
one of five types in the programming menu of the 13XX programmer. Only
Types 2 and 4 can be used for the hydraulic throttle.
Type 1: two-wire 5k Ω –0 potentiometer throttles
Type 2: 0–5V, current source, and three-wire pot throttles— wired for
single-ended operation
Type 3: two-wire 0–5k Ω potentiometer throttles
Type 4: 0–5V and three-wire pot throttles— wired for wigwag operation
Type 5: three-step switch throttles
Table 1 summarizes the operating specifications for the first four throttle
types. For Type 5 throttles, see Table 2 on page 18. Note: For Type 2 and Type
4 throttles, the controller reads only voltage at the wiper input, even when
potentiometers are used.
For potentiometers, the 1230 provides complete throttle fault protection that
meets all applicable EEC regulations. For voltage throttles, the 1230 protects
against out-of-range wiper voltages (see Table 1), but does not detect wiring
faults; it is therefore the responsibility of the OEM to provide full throttle fault
protection in vehicles using voltage throttles.
Wiring for the most common throttles is described in the following text.
If the throttle you are planning to use is not covered, contact the Curtis office
nearest you.