Audio Amplifiers General Description; Flex-35 And Flex-50 Amplifiers, General; 100 W Audio Amplifiers; Audio Nac Expansion Modules - Simplex 4100ES Manual

Audio Amplifiers General Description

4100ES audio amplifiers are available as dual channel
models rated for 35 W (Flex-35) or 50 W (Flex-50) and as
single channel 100 W models with on-board NACs
(notification appliance circuits) for convenient field
wiring. Common features are summarized as follows:
 Analog input amplifier models are for single or dual
channel system operation
 Digital input amplifier models are for multi-channel
system operation providing up to eight channels over a
single twisted wire pair
 Amplifiers are power-limited with models available
providing 25 VRMS, or 70.7 VRMS output
 When Non-Alarm Audio (NAA) applications (such as
for background music, paging, or for Mass Notification)
are required, optional Constant Supervision modules
provide continued speaker zone supervision during the
page or while background music is playing; due to the
NAA supervision requirements, amplifiers used for
paging or playing background music are derated to 70%
of alarm output rating (24.5 W, 35 W, and 70 W)
 Linear power output stages are traditional Class B
designs for low distortion and low EMI
 An on-board 500 Hz temporal pattern horn tone on each
amplifier provides a default backup tone
 Supervision actively monitors amplifier gain in real
time, comparing output level to input level
 On-board test switches can be activated to test and
observe amplifier backup
 On-board overcurrent protection protects against
overloads and short circuits
 Each amplifier communicates to the host CPU and
allows voltage and current values to be accessed from
the fire alarm control panel operator interface

Flex-35 and Flex-50 Amplifiers, General

Flex-35 and Flex-50 amplifiers are a self-backup
dual channel design that provides a total of 35 W or
50 W of audio power with the following common feature
summary:
 Self-backup feature allows NACs connected to a disabled
amplifier channel to be routed to the remaining channel
with the full 35 W or 50 W providing the single channel
as selected by the fire alarm control panel programming;
external backup amplifiers are not required
 Three standard on-board audio NACs are each rated for
2 A maximum and are capable of being routed to either
desired amplifier channel
 Compatible power supplies include the: Expansion
Power Supply (XPS), Remote Power Supply (RPS),
or System Power Supply (SPS); power supplies with
single amplifiers can provide power for other compatible
applications within their rated output
 Digital models of the Flex-35 and Flex-50 have a digital
decoder module that selects one or two of the input
channels as desired
 Selectable reduced output levels of -12 dB or -6 dB are
available for non-emergency audio output, selectable per
channel
Flex-35 Amplifiers
 Each Flex-35 channel is capable of up to 35 W output
with a total of 35 W
 Channels can be divided as 0 W and 35 W; 17.5 W and
17.5 W; 10 W and 25 W; or any combination that totals
35 W or less
Flex-50 Amplifiers
 Each Flex-50 channel is capable of up to 50 W output
with a total output of 50 W
 Channels can be divided as 0 W and 50 W; 25 W and
25 W; 10 W and 40 W; or any combination that totals
50 W or less
Dual Flex-35 or Flex-50 Connections
 Two Flex-35 amplifiers, or two Flex-50 amplifiers can
connect to a single Expansion Power Supply (XPS) in
the same audio expansion bay (amplifiers must be the
same model number); XPS output is dedicated to
amplifier power
 Mounting for dual Flex-35 or Flex-50 amplifiers is
Blocks A & B for amplifier 1, Blocks C & D for the
XPS, blocks E & F are not used, and Blocks G & H are
for amplifier 2 (see page 7 for mounting reference)

100 W Audio Amplifiers

100 W amplifiers provide single channel operation per
the following feature summary:
 Six standard on-board Class B audio NACs are each
rated for 2 A maximum
 100 W amplifiers include a built-in power supply and
use system battery backup
 Amplifier and power supply size requires four
continuous blocks of expansion bay size
 A single 100W primary amplifier or both a primary and
a backup amplifier can be located on a single expansion
bay (refer to page 7 for bay loading)
 Redundant (backup) amplifiers interconnect directly to
minimize wiring connections and their power is routed
through the NACs of the primary amplifier
 Redundant amplifier operation can be configured as
one-for-one or one-for-many depending on specific
requirements
 Digital models of these amplifiers have a digital decoder
module that selects the desired input channel per system
requirements
 Selectable reduced output levels of -12 dB or -6 dB are
available for non-emergency audio output

Audio NAC Expansion Modules

 For applications requiring additional NACs, modules are
available for on-board expansion and further expansion
is available with the chassis mounted 4100-5116
Expansion Signal Module
 100 W Amplifiers support optional modules that convert
the six audio NACs to Class A or to increase the Class B
audio NACs to twelve

Adding NAC expansion modules does not
NOTE:
increase amplifier power beyond the stated ratings
3 S4100-0034-12 3/2012