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ECC-50BDA Backup Remote Amplifier
Class A (Style Z)
Figure 3.6 illustrates how to wire speakers to the control panel using Class A (Style Z) wiring.
Audio Riser Wiring
The Audio Riser is an analog voice bus that carries the recorded voice messages from the ECC dis-
play board to the ECC-50BDAs, or the voice messages generated from a system microphone to the
ECC-50BDAs. The maximum resistance on the audio riser is 20Ω. The ECC-50BDA supports two
audio riser channels. The wiring method is the same for both channels. Audio Riser 1 and Audio
Riser 2 should never be wired together.
Connect the Audio Riser from TB22 on the main control board to the ECC-50BDAs as shown in
Figure 3.7.
To next
ECC-
50BDA
32
TB5
TB2
OUT
IN
+
-
+
-
+
-
+
-
+
-
Supervised,
Power-limited
Figure 3.6 Class A (Style Z) Speaker Configuration
ECC-50/100
main control board
UL-listed 15KΩ
ELR at last panel
on Audio Riser
-OUT+
- IN+
TB3
ECC-50BDA
Figure 3.7 Audio Riser Wiring
ECC-50/125DA Instruction Manual — P/N LS10027-000FL-E:D 5/21/2015
firealarmresources.com
TB6
OUT
IN
+
-
+
-
+
-
+
-
-OUT+
- IN+
SW1
TB3
ECC-50BDA
SW2
Installation
TB4
B A +
-
Supervised,
Power-limited
SW1
SW2
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