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ECS Device Installation
4.5.2
Wiring to a FACP
See Figure 4-38 to properly wire the ECS-INT50W to the FACP.
The Internal Amplifier must be powered by a NAC programmed as Constant Auxiliary Power. Refer to
the FACP installation manual.
4.5.3
VBUS Wiring
The VBUS is an analog voice bus that carries the recorded voice messages from the ECS-VCM to the
ECS-INT50Ws, or the voice messages generated from a system microphone to the ECS-INT50W.
The maximum resistance on the VBUS is 20Ω.
FACP
Figure 4-38 Wiring the ECS-INT50W to the FACP
ECS-INT50W
4-27
151455
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