5
Connecting the Base Station Directly to Components
If an interconnect module is not used, connect the components (vehicle detector, speaker/microphone and optional
monitor speaker) directly to the base station as shown in Figure 5. Use 18–20 gauge twisted pair audio wire for all
connections except the microphone. Use an 18–20 gauge shielded twisted–pair of audio wire for the connection to
the microphone.
!
Important
The twisted–pair of wires for the microphone connection must be shielded for
proper operation. In duplex systems, microphone and speaker cannot be in the
same jacket unless specially designed for duplex such as 3M 78–8095–0180–8.
Figure 5. Direct Base Station–to–Component Connections