Curtis Instruments AC F4-A User Manual

2 — INSTALLATION AND WIRING
Curtis AC F4-A Motor Controller – August 2020 Return to TOC
pg. 14
AVAILABLE/ALTERNATIVE SWITCH (DIGITAL) INPUTS
Switch 1 16
(Throttle Wiper, typical usage)
Rising edge = 4 V max
Falling edge = 1 V min
(Low/Off (pulled to B–)
> 20k Ω
Switch 2 8
(motor temp sensor, typical usage)
Internal pull-up: Off = open (pin),
On = pull to I/O Gnd (< 2 mA)
Based upon usage.
Contact Curtis
Switch 3 31
(Motor Position Sensor, typical usage)
Rising edge = 4 V max
Falling edge = 1 V min
(Low/Off (pulled to B-)
As Encoder:
5k Ω
As Sin/Cos Sensor:
> 50k Ω
Switch 4 32
Switch 6 15 (Pot 6 Supply, typical usage) > 20k Ω
AVAILABLE/ALTERNATIVE SWITCH (DIGITAL) PWM INPUT
Switch 10 10
Selectable Low to High Frequency: 500 –
10,000 Hz
Selectable Low to High Duty Cycle: 0 – 100%
Ability to monitor selection as a percentage
of settings.
See Switch 10, above
Frequency Measurement Range 500Hz – 10kHz
Frequency Measurement Accuracy ± 1%
Duty Cycle Measurement Range 10-90%
2
Duty Cycle Measurement Accuracy ± 1%
Fault Diagnostics • Input frequency out of congurable min/max limits
• Input duty-cycle out of congurable min/max limits
Signal Name Pin Logic Threshold
2
Input Impedance
Switch 21 2 (Coil Drivers, typical)
Rising edge = 8 V max
Falling edge = 1 V min
(Low/Off (pulled to B–)
> 30k Ω
(800 uA leakage current
at nominal voltage)
Switch 22 5
Switch 23 4
Switch 24 3
Switch 25 6
Switch 26 19
Switch 27 20
SWITCH CLEANING CURRENT
≥ 2.0 mA at nominal battery voltage (24V model)
≥ 1.3 mA at lowest nominal battery voltage (36-48V model)
VCL Functions VCL Monitor Variables
Enable_Emer_Rev( )
Disable_Emer_Rev( )
Setup_4p_Select( )
Switch_X (X = Switch#) [as assigned in Programmer]
Any of the applicable, lift, lower, interlock, EMR input
active, etc.
1
Logic thresholds are adjustable. See I/O parameter settings in Application and Controller Setup menus
2
The ability to measure duty cycles near 0% or 100% is a function of the voltage/frequency of the applied signal and the input
capacitance that is added for protection against ESD. Lower input frequencies can allow reading closer to 0%/100% duty cycles.
Test each application in its actual operating environment and implement with an acceptable margin of error.
Table 5 Switch (Digital) Inputs Electrical Specifications, cont’d

Curtis Instruments AC F4-A Specifications

General

Brand	Curtis Instruments
Model	AC F4-A
Category	Controller
Language	English