Toa FS-7000 SERIES Installation - Manual (Page 17)

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5.5. FS-7000AT Attenuator Control Panel
The FS-7000AT is used in conjunction with FS-7000 Series Voice Evacuation Systems to control 4-wire
system attenuators. Up to 10 zones can be attenuator-controlled. When general urgency or emergency
broadcasts are made, the FS-7000AT provides 24 V DC power to allow such broadcasts to bypass the
attenuators. The output status of each line can be monitored by the indicators on the front panel.
[Front]
2 3 1
6 7 8 5 4
[Rear]
1. Power Indicator
Lights when power is supplied and the FS-7000AT
is ready for operation.
2. Attenuator Line Indicators
Light when 24 V DC for bypassing the attenuators
are being supplied, and extinguish when the
overcurrent protection circuit is triggered due to
line shorts or other failures, or when the power
supply is cut off.
3. Broadcast Zone Fill-In Space
Write the names of the corresponding broadcast
zones in this space.
4. DC Power Input Terminal
Connect this terminal to 24 V DC power to be
used for internal circuits. Power is supplied from
the FS-7000PS.
(M3 screw terminal; barrier distance: 6.4 mm)
5. Functional Earth Terminal
Connect this terminal to the functional earth
terminal of external equipment if excessive noise
is generated when the external equipment is
connected to the FS-7000AT. This could reduce
noise.
Note: This terminal is not for protective earth.
6. AT Control Terminal
Connect this terminal to the FS-7000JP to control
ON/OFF operations of the Attenuator Control
Output (8).
7. ATT DC Power Input Terminal
Connect this terminal to 24 V DC power used for
attenuator control to be output from the Attenuator
Control Output Terminals 1 – 10 (8).
(M3 screw terminal; barrier distance: 6.4 mm)
8. ATT Control Output Terminals
Provide 24 V DC output for bypassing the
attenuators during general urgency or emergency
broadcasts.
[M3 screw terminal; barrier distance: 6.4 mm;
maximum current capacity: 5 A (total of 10
lines)/0.75 A (per line)]