SilentKnight EVS - Manual (Page 41)

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.