3M D-2400 installation instructions Wiring the System

3M Model D-2400 Wiring the System

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

	Distance Between
Wire Gauge	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)

	Distance Between
Wire Gauge	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

5