Toa FS-971 SERIES - Manual (Page 14)

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5. GENERAL BROADCAST AND ATTENUATOR-FREE BROADCAST
DURING POWER FAILURE
5.1. How to Make "Power-Failure" General Broadcast and Attenuator-Free Broadcast
By installing an emergency power supply panel, which is independent of that for emergency broadcast,
general broadcast can be made even during a power failure using the battery. The battery to be installed in
the emergency power supply panel is optional.
Notes
• To make power-failure general broadcast or attenuator-free broadcast, the emergency power supply panel
and battery solely intended for this purpose must be installed in the main rack.
• The emergency power supply panel and battery, installed for emergency broadcast, cannot be used for
power-failure general broadcast or attenuator-free broadcast.
5.2. Terminals for Power-Failure General Broadcast and Attenuator-Free Broadcast
The JP-0410 is equipped with two control inputs, power-failure control input and attenuator-free control input,
for activating general broadcast during a power failure.
5.2.1. Power-failure control input
Shorting the power failure control input terminal with the grounding terminal supplies power from the
emergency power supply panel for power-failure general/attenuator-free broadcast to equipment, thereby
enabling broadcast. When the power-failure general broadcast gets started, the speaker line is not selected.
To make broadcast, select the speaker line at the main rack or remote control unit.
Ground
Power-failure general broadcast activation contact.
(Procure this switch separately.)
Contact capacity: 30 VDC, over 100 mA JP-0410 front-mounted
terminal block
Power-failure
control input
Output
JP-0410
EP-0510
Power-failure general broadcast activation contact.
(Procure this switch separately.)
Contact capacity: 30 VDC, over 100 mA
Digital announcer, etc.
(24VDC-operated equipment)
JP-0410 rear-mounted
terminal block
Ground
Attenuator-free
input
Attenuator-free
control input
Start terminal
+
-
Power-failure general broadcast can be made while the switch for activation of power-failure general
broadcast is at make. If the switch for activation of power-failure general broadcast is at break, the power-
failure general broadcast is terminated, putting the system in the standby mode.
5.2.2. Attenuator-free control input
If the attenuator-free control input terminal is shorted with the grounding terminal, attenuator-free broadcast
can be made to the line set by writing even during a power failure. Only the signal connected to the EP-0510's
attenuator-free input is broadcast. In this event, the broadcast is always attenuator-free broadcast (which is
output to R line).
Closing the attenuator-free control input during AC power operation causes the broadcast to take precedence
over other broadcasts.