3M D-2400 - Manual (Page 9)

3M Model D-2400 Wiring the System
5
Wiring the System
Depending on distance use twisted pair, 14-22 AWG audio cable when wiring Convenience Store Intercom
System, Model D-2400, components. Figure 5 shows an overview of the cable types and number of connectors
required for each unit. Table 1 shows wire gauge required for different distances between components.
Note:
The RS485 cable carries DC power for the Station Selectors, requiring a larger gauge wire.
Figure 5. Cable and Connection Requirements
All Audio Wiring
Wire Gauge
Distance Between
Components
22 Up to-309 feet
20 310-493 feet
18 494-783 feet
16 784-1245 feet
14 1246-1980 feet
RS 485 Cable (only)
Wire Gauge
Distance Between
Components
22 Up to 62 feet
20 63-99 feet
18 100-157 feet
16 158-249 feet
14 250-396 feet
Table 1. Wire Size Requirements