MoTeC SDL - Manual (Page 13)

MoTeC Overview 11
Input Voltage Range
The measurable input voltage range is 0 to 15 Volts. This allows selection
from a wide range of sensors.
Specifications
For full specifications see Appendix D: Input Characteristics.
Wide Band Lambda Input
The single high accuracy, fully temperature compensated Wide Band Air Fuel
Ratio measurement input can be used if the Lambda Option is enabled.
This input connects directly to a MoTeC 4 wire Wide Band Lambda Sensor
and is accurate to 1.5% up to 1.2 Lambda under all load and temperature
conditions.
Note that this is the Bosch LSM sensor and not the 5 wire Bosch LSU sensor.
Note that NTK Lambda sensors should be connected to an Analog Voltage
input via the appropriate amplifier.
Switch Inputs
The 2 switch inputs are generally used for the external switches required to
operate the SDL display. They can also be connected to a brake switch or
other switch.
These inputs have a 4700 ohm resistor connected internally from the input pin
to the 5V sensor supply so that a switch can be simply connected between
the input pin and 0 volts.
Specifications
For full specifications see Appendix D: Input Characteristics.
Digital Inputs
The 2 digital inputs are identically to the switch inputs except that they include
the following additional measurement methods:
• Frequency: The frequency of the input signal is measured
• Period: The time between successive pulses is measured
• Pulse width: The low time of the pulse is measured
• Count: Counts the number of pulses