12 Overview
Specifications
For full specifications see
Appendix D: Input Characteristics
.
Speed Inputs
The 2 Speed Inputs are identical to the Digital Inputs except that they can
also be configured to suit Variable Reluctance (Magnetic) sensors such as
some wheel speed sensors. Because the amplitude of the signal from these
sensors varies with speed of rotation, variable trigger levels are required,
which must vary with the frequency of the input signal.
The Speed Inputs can also be used with Hall Effect type wheel speed
sensors.
•
Note also that the Pulse Width measurement method measures the high
time of the pulse rather than the low time as measured by the Digital
Inputs.
Specifications
For full specifications see the Appendices.
Internal Sensors
The SDL includes internal sensors for G force lateral, G force Vertical, battery
voltage and internal temperature.
Expander Thermocouple Inputs
An E888 expander may be connected to the SDL to read the 8 thermocouple
inputs. These are added and calibrated when the CAN comms template “E8xx
Rx EGT” is selected as one of the 6 possible CAN devices.
Auxiliary Outputs
The SDL has 4 Auxiliary Outputs which may be used to control various
vehicle functions such as: Gear Change Lights, Warning Lights, Thermatic
Fan, Gear Box Oil Pump, etc. The outputs are On/Off only and do not support
variable frequency or duty cycle control.
The Auxiliary Outputs switch to ground and can drive up to 0.5 Amps. Devices
that consume more than 0.5 Amps such as motors should be driven via a
relay.
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