6: Vbus Wiring - Honeywell SILENT KNIGHT EVS Series Manual

Installing the EVS-100W
Class A Speaker Configuration for EVS-100W
Figure 4.40 illustrates how to wire speakers to the control panel using Class A wiring.
4.6.6 VBUS Wiring
The VBUS is an analog voice bus that carries the recorded voice messages from the EVS-VCM to the EVS-100W amplifiers, or the voice
messages generated from a system microphone to the EVS-100W amplifiers. The maximum resistance on the VBUS is 20Ω.
The EVS-100W supports two VBUS channels. The wiring method is the same for both channels. VBUS1 and VBUS2 should never be wired
together.
Connect the VBUS from the EVS-VCM to the EVS-100W amplifiers as shown in Figure 4.41 and Figure 4.42
EVS-VCM
EVS Series Manual — P/N LS10062-001SK-E:D 3/15/2022
AUDIO CIRCUIT OUT
AUDIO CIRCUIT IN
supervised,
power-limited
Figure 4.40 Class A Speaker Configuration
supervised,
power-limited
Class B
+
+
Figure 4.41 VBUS Wiring for Single Channel for EVS-VCM
AUDIO CIRCUIT OUT
AUDIO CIRCUIT IN
UL-listed 15kΩ
EOL at last device
on the VBUS
EVS-100W
EVS Device Installation
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EVS-100W
EVS-100W
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