Notifier DAA2 - Page 114

114 DAA2 & DAX — P/N 53265:A1 8/24/2011
DAA Digital Audio Amplifiers Installation
 In Riser Mode to Additional Amplifiers
When a DAA’s Riser Mode is programmed R
ISER MODE TO ADDITIONAL AMPLIFIERS (refer to
VeriFireTools help file or the DVC Digital Voice Command manual for programming description),
the amplified signal from the DAA may be connected to an audio coupling transformer (ACT-25
for 25V amplifiers, ACT-70 for 70V amplifiers) to drive additional AA-Series amplifiers. This
mode provides a 200 Hz aupervisory tone required by analog amplifiers.
Figure C.26 DAA Riser Mode to Additional Amplifiers
Refer to the ACT-25 or ACT-70 installation document for more information.
High-
level
Return
High-
level
Out
R-10K
Circuit 1
Circuit 2
Circuit 3
Circuit 4
20k ohm end-of-line resistor,
p/n ELR-20K
20k ohm end-of-line resistor,
p/n ELR-20K
Figure C.25 One DAA Class A (Style Z) Circuit,
Two Class B (Style Y) Circuits
AA-100/AA-100E
or
AA-120/AA-120E
AA-30/AA-30E
Audio Coupling
Transformer
DAA
Low-level Audio
Low-level Audio
High-level Audio
High-level Audio
To other audio coupling
transformers or 20k ELR
(Class B)
Optional 4-wire return from last audio coupling transformer
TB1
P1
P1
TB1
TB10
TB11
10k ELR (Class A)
DAA_ACTHI_risermode.wmf
Audio
Coupling
Transformer
Up to 7
low-level
inputs
Up to 7
low-level
inputs