Specifications

14
EST3
EST3
Network
SUBMIT
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Network
Audio Amplifiers (Zoned)
EST3 audio amplifiers decode and re-expand the eight
multiplexed audio signals on the network audio riser.
Under command of the network, one of the available
eight signals is selected to be distributed over the
speaker circuit. Command and control signals for the
amplifier are sent and received via the network data
riser in response to network programming.
Amplifiers are available in 20, 40 or 95 watt ver-
sions, with supervised, power limited 25 Vrms or 70V
RMS
outputs. The amplifier output is wired to a single
speaker zone. Each amplifier has a 1 KHz temporal
tone generator used as evacuation signal in the event of a fault with the network audio circuit. In the
event of an on-line amplifier failure, a standby amplifier may be configured for automatic replacement
of any on-line amplifier configuration. 20 and 40 watt amplifiers also provide an independently controlled
supervised, power limited 24 Vdc notification appliance circuit rated at 3.5 amps. All field wiring connections are made via
plug-in connectors.
3-ZA20A 20 Watt Zoned Amplifier w/Class A/B (Style Z/Y) Audio & Class A/B 24 VDC outputs Catalog Sheet: 85010-0057
3-ZA20B 20 Watt Zoned Amplifier w/Class B (Style Y) Audio & Class B 24 VDC outputs Catalog Sheet: 85010-0057
3-ZA40A 40 Watt Zoned Amplifier w/Class A/B (Style Z/Y) Audio & Class A/B 24 VDC outputs Catalog Sheet: 85010-0057
3-ZA40B 40 Watt Zoned Amplifier w/Class B (Style Y) Audio & Class B 24 VDC outputs Catalog Sheet: 85010-0057
3-ZA95 95 Watt Zoned Amplifier w/Class A/B (Style Z/Y) Audio output Catalog Sheet: 85010-0057
COMMON ENCLOSURE
AUDIO
AMPLIFIER
MODULE
(ZONE #1)
AUDIO
AMPLIFIER
MODULE
(ZONE #2)
AUDIO
AMPLIFIER
MODULE
(ZONE #3)
AUDIO
AMPLIFIER
MODULE
(BACKUP)
12 43567891012 435678910 12 435678910 12 43 5678910
12435678910 12435678910 1243567891012435678910
VISUAL NOTIFICATION
APPLIANCE CIRCUIT
++
--
++
--
++
--
AUDIO NOTIFICATION
APPLIANCE CIRCUIT
Audio Amplifiers (Banked)
Banked Amplifiers provide EST3 with
economy audio configurations for single
and some dual channel applications.
Model 3-ZA20A/B Zoned Amplifiers at the
EST3 control panel provide channel
sources for banked amplifiers. 3-ZA20A/B
amplifiers can select any of EST3’s eight audio channels as a signal source.
A special interface module, the 3-ATPINT, accepts analog audio signals at 25
or 70V
RMS from EST3’s Zoned Amplifiers and passes these signals to the 1B3125
and 1B3250 Audio Power Amplifiers via an Amplifier Terminal Panel (ATP).
The 3-ATPINT mounts in the ATP.
The ATP Audio Terminal Panel interfaces one or two audio power amplifiers
and monitors utility power, charges and supervises standby batteries, and provides switch-over to standby. The
amplifier bank is monitored and controlled through Signature Series modules.
1B3125 Audio Power Amplifier — 125 Watts Catalog Sheet: 85010-0011
1B3250 Audio Power Amplifier — 250 Watts Catalog Sheet: 85010-0085
ATP Amplifier Terminal Panel Catalog Sheet: 270041
3-ATPINT ATP Interface Module Catalog Sheet: 85010-0085
URSM Universal Riser Supervisory Module Catalog Sheet: 270038
RKU 19-inch Equipment Rack
Remote Microphones
The remote microphone panel is a supervised remote microphone, used with the 3-ASU Audio Source Unit’s remote
microphone input. The front panel provides Local Page Active, Remote Page Active, and Trouble LED indicators as well
as an integral VU (Volume Unit) meter to indicate page volume level. All panels use a 24 Vdc power source and all
wiring is supervised. One form C trouble contact is provided.
3-REMICP Remote Microphone — Chassis Mount Catalog Sheet: 85010-0105
3-REMICA Remote Microphone — Annunciator Mounted Catalog Sheet: 85010-0105
Signature Series Audio Amplifiers, p.35