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American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 111

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METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS
DE304.09 9-106 Revision 4 : 05/09/12
Metro Baseline Re-Baseline: 04/29/10
3. Supervision and Alarms
a. The PA subsystems shall be fully supervised with failure annunciation.
b. A local annunciator/alarm panel shall:
1) Indicate individually the failure of any supervised circuit or
equipment,
2) Annunciate the transfer to a standby power amplifier,
3) Upon failure of standby power amplifier, activate the appropriate
annunciator or alarm.
4. System Input Priorities
Up to six levels of prioritized inputs shall be selected from various sources at
the stations, Yard and the ROC PA subsystems. Microphones shall be
provided at the EMP/CP and the PA equipment racks to access the station
PA subsystem. Prerecorded voice announcements shall be activated either
locally or by remote control from the ROC for information or emergency
announcements. Inputs from ROC shall be transmitted via CTS. Remote
access to the PA subsystem shall also be provided via dial access from the
telephone subsystem. The following inputs shall be provided:
Table 9.3 – Input Priorities
Priority
Passenger
Stations
Yard/Shop
ROC
1st
Station
EMP/CP/TCCR
Microphones
Yard
TCCR
Microphones
ROC TCCR
2nd
Metro ROC -
Communications
Yard Tower
Metro private
telephone
system
3rd
ROC - Other
Agency*
Metro private
telephone
system
Announcements
4th
Prerecorded
Announcements
All other inputs
5th
All other inputs
*Passenger Stations that serve two separate rail transit systems shall be equipped
with a PA subsystem having the additional capability of accommodating the second
control center between the regular 2nd-and 3rd-priority levels.
9.8.1.2 Remote Access
9.8.1.2.1 Telephone Access
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