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5 vbus wiring, 5 vbus wiring -19 – SilentKnight EVS User Manual

Page 41

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EVS Device Installation

LS10062-001-SK-E

4-19

4.5.5

VBUS Wiring

The VBUS is an analog voice bus that carries the recorded voice messages from the
EVS-VCM to the EVS-50W’s, or the voice messages generated from a system
microphone to the EVS-50W’s. The maximum resistance on the VBUS is 20

.

Connect the VBUS from the EVS-VCM to the EVS-50W’s as shown in Figure 4-19.

Figure 4-19 VBUS Wiring

To Next EVS-50W

UL Listed 15k

EOL

EVS-VCM

EVS-50W

EVS-50W

Supervised

Power Limited

at Last panel

on the VBUS

VBUS Connections

3 Vrms, 5 mA max.