Installation and Maintenance Manual
Model 300SCW-1 Wall-Mounted Command Unit
15
Installing SelecTone Tone Modules
SHOCK HAZARD
—
Do not perform any installation or maintenance on this
system when power is on. Because the 300SCW-1 does not have a power
switch, ensure that the power is disconnected before proceeding. Failure to
heed this warning may cause serious injury or death.
The 300SCW-1 can accommodate up to four SelecTone modules of your choice. To install the tone
modules, insert them into the corresponding receptacles on the printed circuit board. The receptacles
for
TONE 1
module and
TONE 2
module are located on the motherboard. Receptacles for the
TONE 3
module and
TONE 4
module are located on the card that plugs into the motherboard.
Two Methods of Supplying Power to the SelecTone System
The two basic methods of supplying power to a SelecTone system are 120 Vac, 50/60 Hz local power and
24 Vdc central power. The following paragraphs describe each method along with the advantages and
disadvantages.
120 Vac 50/60 Hz Local Power System
INSTALLATION PRECAUTION
—
Improper installation could render this
system inoperable, interfering with the warning nature of this product. The
installation must conform to applicable local and/or National Electrical codes.
See Figure 8. In this system, power is supplied to each remote SelecTone device by connecting it to a
120 Vac supply in the immediate vicinity of the device. If an emergency power source is required, use a
central power system as described in "24 Vdc Central Power System" on page 16.
Figure 8 Typical local power system
290A7342
MODEL 300SCW-1
AC POWER IN
4 5
17 1
16
TB1
TB2
MODEL 300GC
MODEL AM25CK
SIGNAL LINES SHIELDED
TWISTED PAIR
120 Vac
120 Vac
120 Vac
LOCAL PWR.
LOCAL PWR.
POWER
LINES
Summary of Contents for SelecTone 300SCW-1
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