3 wiring specifications, Wiring specifications, Figure 1.3 wire routing example for ecc-50da – Fire-Lite ECC-125DA/E Distributed Audio Amplifiers User Manual
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ECC-50/125DA Instruction Manual — P/N LS10027-000FL-E:B 8/13/2013
ECC-50DA Remote Amplifier
Installation
1.1.3 Wiring Specifications
To avoid induced noise (transfer of electrical energy from one wire to another), keep input wiring
isolated from high-current output and power wiring. Avoid pulling one multiconductor cable for
the entire panel. Power-limited, nonpower-limited, and audio circuit wiring must remain separated
in the cabinet. Maintain at least 0.25” (6.35 mm) spacing. Power-limited, nonpower-limited, and
audio circuit wiring must enter and exit the cabinet through different knockouts and/or conduits.
For the same reasons, wiring within the cabinet should be routed around the perimeter of the cabi-
net. It should not cross the printed circuit board where it could induce noise into the sensitive
microelectronics or pick up unwanted RF noise from the high speed circuits.
High frequency noise, such as that produced by the inductive reactance of a speaker or bell, can
also be reduced by running the wire through ferrite beads or by wrapping it around a ferrite toroid
core. Figure 1.3 provides an example.
To AC
ON
12
3
4
5
BATTERY
+ –
OUT
–
+
IN
–
+
–
+
A
B
SBUS
CIRCUIT 4
CIRCUIT 3
CIRCUIT 2
CIRCUIT 1
IN
IN
IN
IN
+
+
+
+
–
–
–
–
OUT
OUT
OUT
OUT
+
+
+
+
–
–
–
–
A
U
DIO
E
X
P
A
N
DE
R
CIRCUIT 5
CIRCUIT 6
CIRCUIT 8
CIRCUIT 7
+ OUT –
+ OUT –
+ OUT –
+ OUT –
+ IN –
+ IN –
+ IN –
+ IN –
A
U
DIO E
X
P
A
NDE
R
Figure 1.3 Wire Routing Example for ECC-50DA
Audio Riser/Data Bus
Power-limited Circuits
(Class 2)
Speaker Circuits
Power-limited Circuits
(Class 2)
Speaker Circuits
Power-limited
Circuits
(Class 2)
AC Power
Nonpower-
limited Circuit
50
da
u
lpwr
.wmf
wire clamp
wire clamp
battery
wire
audio circuit
1 inch
Use a 1” spacer and wire
clamps to ensure 0.25”
spacing between power-
limited and nonpower-
limited wiring.
ECC-50DA
ECC-CE4
Refer to the ECC-CE4 Installation
Instructions, LS10002-000FL-E, for
more information on mounting and
wiring the CE4 Circuit Expander.