Simplex 4003 - Slave to the 4020 System; Stand-Alone System; Remote Microphone

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Five wires are required for this installation. (See Figure 17.)
Figure 17. Interconnection to the 4020
Pair A connects the NAC of the 4020 FACP to the NAC of the 4003. Another
wire is required for EARTH Detection Reporting to the host FACP. A twisted
shielded pair is required for the Remote Unit Interface (RUI). This pair provides
manual alarm activation and the Voice Walk Test feature.
As a standalone system, no wiring to an outside FACP is necessary.
When wiring the remote microphone to the 4003, one twisted shielded pair is
required for audio transmission. Five additional conductors are also required for
microphone control functions. The maximum wiring distance for this
installation is 4500 feet (1372 meters).
System Wiring Configurations, Continued
Slave to the 4020 System
Stand-Alone System
Remote Microphone
EARTH REPORTING
TWISTED SHIELDED
4003
4020
RUI
0 V
A
NAC
RUI
0 V
NAC
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