Emergency Command Center Manual —
P/N LS10001-000FL-E:G 5/3/2016
39
Output Circuits
Installation
2.6.4 Speaker Volume Control
Speaker Volume Control requires use of the Cooper Wheelock SP-SVC module. The Supervised
Volume Control (SP-SVC) allows manual volume setting for telephone paging and background
music for a specific speaker or speaker zone. The selected adjustment will not affect the volume
setting of emergency prerecorded messages or live microphone usage. Refer to the
Cooper Whee-
lock Safepath SP-SVC Installation Instructions
(P/N: P84598) for more information.
Notes:
1. Only one (1) SP-SVC can be installed per audio zone; however, multiple speakers can be
controlled by the same speaker volume control override output.
2. All fixed volume speakers must be placed before the SP-SVC in the speaker circuit. Any
speakers placed after the SP-SVC module will be able to be attenuated.
3. An end-of-line resistor (ELR) must be installed on the last speaker connected to the SP-SVC.
4. Attach wires according to the label on the terminal block. The DC input/output terminals are
interchangeable. If the SP-SVC is the last unit in the Speaker Volume Control Override circuit,
then an ELR must be installed.
5. The maximum wire impedance between devices must not exceed 35 ohms.
SPK
R
AMP
DC
DC
+
-
+
-
+
-
+
-
}
}
}
}
1
0
2
3
4
5
6
7
8
9
10
}
+
-
+ -
+
-
From preceding volume control module
or override output (on main board)
To next speaker (variable volume)
From audio output or preceding
speaker (fixed volume)
To next volume control module or ELR
SP-SVC
SP-SVC terminal layout
Variable Volume
Speakers
Fixed Volume Speakers
15K, 1W ELR
P/N: ELR-15K
4.7K, 1/2W ELR
P/N: 71252
Figure 2.18 Speaker Volume Control Wiring
TB23 on ECC-50/100
main control board
From Speaker
Circuit Output
e
c
c
tb
2
3
.w
m
f
s
p
-s
v
c
w
ir
e
.w
m
f
Summary of Contents for ECC-50/100
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Page 95: ...Emergency Command Center Manual P N LS10001 000FL E G 5 3 2016 95 Notes ...
Page 102: ...102 Emergency Command Center Manual P N LS10001 000FL E G 5 3 2016 Notes ...
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