Installation Guide

Document Version: 11 17 | P a g e
© 2016 MiX Telematics International (Pty) Ltd.
Pin
Colour
(Prim/Sec)
Name
Function
Application Information
2
White
RXD
RS-232 Receive
3
Blue
RTS
Ready to send
4
Green
CTS
Clear to send
5
Red
POSD1
Positive Drive 1
Load current must not exceed
1A. Suitable for driving
capacitive loads such as MiX
Rovi terminals.
Output controlled by MiX 4000
and selected in Vehicle
Properties of frontend user
software.
6
Brown
GND
Ground
6.5.5 MiX 4000 Serial Harness 2 (use Serial Harness SR1)
Connector viewed from the back (wiring side) of harness (440FT0931)
Pin
Colour
(Prim/Sec)
Name
Function
Application Information
1
Yellow
TXD
RS-232 Transmit
2
White
RXD
RS-232 Receive
Also used for communication to
DTCO D8 line.
3
Blue
RTS
Ready to send
RTS looped to CTS.
4
Green
CTS
Clear to send
RTS looped to CTS.
5
Red
POSD2
Positive Drive 2
Load current must not exceed
0.25 A
Output controlled by MiX 4000
and selected in Vehicle
Properties of frontend user
software.
6
Brown
GND
Ground
6.5.6 GSM, GNSS and BT Antennas
The Modem, GNSS and BT all have internal antennas. The GNSS has an external antenna option as well to
cater for circumstances where better reception is required. Thus, fitting the external antenna is optional. The
system detects automatically whether an external antenna is fitted or not. It can also detect tampering, like
an external antenna disconnection or a short. In the case where there is no external antenna or in the case
of tampering, the system will automatically switch to the internal antenna.
For deep installations with a lot of metal obstruction, it is recommended to use the external antenna.