4
In the 4020 Slave configuration (shown in Figure 2), the VCP communicates
with the 4020 Master Controller via the Remote Unit Interface (RUI) two-wire
communications bus. This allows the 4020 to monitor the 4003 status and to
control tone and message selection. A dedicated 4020 notification appliance
circuit is connect to the 4003 to activate its four NAC speaker outputs.
The 565-358 Voice Controller Assembly is similar to the 4100-family audio
controller. Alarm messages are originated at the host 4020 Master via the
existing "Play" command format. The VCP monitors its amplifier for trouble
conditions. In the "slave" configuration, amplifier status is reported at the 4020
Operator Interface Panel in the same manner as is done with 4100 Voice
systems. Microphone supervision, VTG, chipset, and all other card troubles are
reported to the 4020 Master.
4020
FACP
VOICE
CONTROL
PANEL
COMMUNICATIONS
HOST NAC
Figure 2. 4003 Voice Control Panel in the Slave Configuration
Spoken (or Voice) Walk Test operation is available with this configuration.
During system Walk Test, activation of the "Manual Evacuation" switch,
microphone, or "All Clear/Second Message" switch generates a voice message
response to the device being tested. Activating addressable manual station 075
on an addressable MAPNET II
circuit on Channel One of the 4020 yields the
voice message "Testing Channel One, Device Seven Five". Voice message
splicing is limited to the standard Walk Test messages and any spoken codes that
fit in the standard chipset.
Continued on next page
Hardware Components, Continued
4020 Slave Configuration
MAPNET II Communication is protected by U.S. Patent No. 4,796,025.
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