3M C860 User Manual

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

3M C860 Specifications

General

Brand	3M
Model	C860
Category	Intercom System
Language	English