Supervision Frequency: 40 kHz
Supervision Frequency Level: 5mV to 50mV into 47 kilohms
Input Impedance: Medium-Z 10 kilohms
Detector Input Signal @ 40 kHz: 2V
Detector Supervision Range: 2 dB (min.) to 12 dB (max.)
Failure Indicators: LEDs (visual) and tone module (aural)
Controls: Screwdriver-adjustable controls for oscillator level
and detector sensitivity
Remote Annunciation: Status terminal provides 12V DC / 100 mA in the
failure mode
Power Consumption: 120V AC, 15W or 12VDC @ 0.5A
Operating Temperatures: 14° F (-10° C) to 149° F (65° C)
Dimensions: 19" W x 3-1/2" H x 7-1/2" D
Weight: 8 lb.
Finish: Black enamel
Architect &
Engineer
Specifications
Technical
Specifications
50 Spring Street, Ramsey, New Jersey 07446, U.S.A.
201-934-8500 FAX: 201-934-9832
Web Site: www.bogen.com
The amplifier failure detector and automatic substitutor
shall be a Bogen Model AFDS2, or equivalent, capable
of continuously supervising the operation of any main
power amplifier and its standby amplifier in a sound
system.
It shall be capable of detecting a loss of as little as 2 dB
in either amplifier and automatically switch operation
from main to standby amplifier, should the main
amplifier be at fault.The failure of either amplifier shall
be indicated by a corresponding front, panel-mounted
LED and an aural fault alert tone. It shall be possible to
silence the tone by depressing the SILENCE button,
which shall automatically reset when the failure is
corrected.
A 40 kHz signal, originated within the AFDS2, shall be
pulsed into the inputs of the main and standby
amplifiers and their outputs shall be continuously
analyzed; if either amplifier should fall below 2 dB*, the
AFDS2 shall be activated.
It shall be suitable for operation with, and capable of
detecting failure in, any 25V or 70V balanced or
unbalanced system.
The device shall be powered from either a 120V AC,
60 Hz line or a 12V DC source, with power
consumption limited to 15W or 0.5A, respectively.
Screwdriver-adjustable controls shall be provided on
the unit for setting the sensitivity of the device and the
level of the 40 kHz oscillator.
The unit shall be 19" W x 3-1/2" H x 7-1/2" D and
shall weigh 8 lb.The panel shall be fabricated from #16
gauge cold-rolled steel and shall be finished in black
enamel.
*Threshold is adjustable.
