Fire-Lite ECC-125DA/E Distributed Audio Amplifiers - Manual (Page 10)

10 ECC-50/125DA Instruction Manual — P/N LS10027-000FL-E:B 8/13/2013
ECC-50DA Remote Amplifier Installation
Class A (Style Z)
Figure 1.5 illustrates how to wire speakers to the ECC-50/100 using Class A (Style Z) wiring.
1.1.5 Audio Riser Wiring
The Audio Riser is an analog voice bus that carries the recorded voice messages from the display
board to the ECC-50DAs, or the voice messages generated from a system microphone to the ECC-
50DAs. The maximum resistance on the Audio Riser is 20
.
Connect the Audio Riser from TB22 on the ECC-50/100 main control board to the ECC-50DAs as
shown in Figure 1.6.
BATTERY
+ – IN OUT–
AU
DI
O EXPAN
D
ER
Figure 1.5 Class A (Style Z) Speaker Configuration
Supervised,
Power-limited
50
da
_a.
w
m
f
OUT
– +
IN
– + – + A B
SBUS OUT
– +
IN
– + – + A B
SBUS
ECC-50/100
main control board
Supervised,
Power-limited
ECC-50DA ECC-50DA
To next ECC-50DA
UL-Listed 15K  ELR
installed at last panel
on the audio riser.
Figure 1.6 ECC-50DA Audio Riser Wiring
50da
au
di
ow
ire.w
m
f