Installation Guide

Document Version: 11 21 | P a g e
© 2016 MiX Telematics International (Pty) Ltd.
10 Signal Inputs
10.1 Digital Inputs
The MiX 4000 is equipped with two digital/analog inputs (I1-I2), which can be used to monitor digital signals.
When the voltage threshold is crossed, an event is triggered. The voltage threshold and the hysteresis are set
in software. Please refer to the section on “Harness Installation” for analogs: Pins 3,4 and 9 (Section 6.5.2) of
this document, for more details. The external inputs and ignition line are protected from typical vehicle
transients and can be directly connected to most vehicle inputs between 0 and 38V (37.95V). The input
impedance is >200 kΩ. Typical connections are shown below.
Note: There is no internal pull-up resistor in the MiX 4000, so observe the correct wiring configurations shown
below for switching to ground or switching to vehicle supply.