Low Current Connector Electrical Specifications; Digital (Switch) Inputs; Table 8 Digital (Switch) Inputs Electrical Specifications - Kohler Curtis F Series Manual

Curtis AC F2-A, F4-A, F6-A Motor Controllers – FOS 4.5 – April 2022

Low Current Connector Electrical Specifications

Digital (Switch) Inputs

The controllers offer flexibility in configuring the digital inputs. For example, when configured as
switch inputs, the available inputs easily interface with user switches/buttons for the following:
• Interlock source.
• Vehicle directional input (forward and reverse).
• Forks lift/lower operations.
• Emergency reverse (NO and NC paired inputs).
• Reach or height limit switches.
The switch inputs in the wiring diagrams illustrate connecting these to B+ (keyswitch) voltage. This
asserts the input to the "on" state. When the switch is open (not switched to B+), this is the non-
asserted, or "off " state. Table 8 lists the inputs' specifications. Notice that these are principally analog
inputs processing the applied voltage.
Virtual inputs
The input state is determined by processing the corresponding voltage from the analog input. These
inputs have software configurable High/Low thresholds. By default, these thresholds are set to
interface with Transistor-Transistor Logic (TTL) inputs; except for Input 1 & 13 (i.e. KSI and Coil
Supply), for which the threshold is set at the brown-out voltage for the controller. These are reported
as either On or Off. The virtual KSI monitor variable is Switch 20 (0x3339 0x00). The virtual Coil
Supply monitor variable is Coil_Supply_State (0x3C42 0x00).
Driver inputs
These are digital inputs that are located on the same pins as the driver outputs. These have a high
threshold of 8V and a low threshold of 1V. These thresholds are as determined by the application's
hardware/wiring configuration.
Generic inputs
These digital inputs are not multiplexed with the analog input (such as a pot wiper) or the driver
outputs. These have a high threshold of 4V (On) and a low threshold of 1V (Off). These thresholds
are as determined by the application's hardware/wiring configuration.

Table 8 Digital (Switch) Inputs Electrical Specifications

pg. 20
Signal Name 23-Pin 35-Pin
Switch 5 8 9
Switch 7 14 22
Switch 8 15 33
Switch 9 n/a 24
Switch 10 n/a 10
Switch 11 19 11
Switch 12 21 12
Switch 13 22 14
Switch 14 n/a 25
Logic Threshold
1
Rising edge = 4V max
Falling edge = 1V min
(Low / Off (pulled to B–)
Return to TOC
Input Impedance
24-36V models = 10kOhm ±10%
36-48V models = 18kOhm ±10%
2 — INSTALLATION AND WIRING