Toa FS-7000 SERIES Installation - Manual (Page 51)

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6.8. Connecting the FS-7000AT to 4-Wire System Attenuators
When an emergency broadcast is made, or when a general urgency broadcast is made from the CP
microphone or FS-7000RM, if the FS-7000AT has been connected to the FS-7000JP, then 24 V DC power will
be supplied to the attenuators to allow these broadcasts to be made at maximum volume by overriding the
attenuators.
Tip
The type of attenuator that can be connected directly is a 4-wire system attenuator for which attenuation
becomes "0" when 24 V DC power is supplied. If another type is used, an additional external circuit must be
installed.
[System Operation]
• 24 V DC power is supplied to the 4-wire system attenuators when an emergency broadcast is made and the
emergency broadcast can bypass the attenuators.
• All-zone calls from the CP microphone or remote microphone can also be set to bypass attenuators.
• Attenuator lines correspond in a one-to-one relationship to the speaker lines of the FS-7000JP connected to
the FS-7000AT.
[Note]
The FS-7000PS to be connected to the FS-7000AT's 24 V DC Input for ATT Control Output must be different
from the one that supplies the 24 V DC power to each panel. Sharing the same FS-7000PS could cause
equipment failures. For the FS-7000PS connected to the 24 V DC Input for ATT Control Output, remove a
jumper wire between F.G and S.G located on the rear panel.