Instruction Manual

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.
B
A
T
T
E
R
Y
+
–
IN
OUT
–
AUDIO EXPANDER
Figure 1.5 Class A (Style Z) Speaker Configuration
Supervised,
Power-limited
50da_a.wmf
OUT
–+
IN
–+ –+AB
SBUS
OUT
–+
IN
–+ –+AB
SBUS
ECC-50/100
main control board
Supervised,
Power-limited
ECC-50DAECC-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
50daaudiowire.wmf