Installation and Maintenance Manual
Model 300VSC-1 and Model 300VSC-1044SB SelecTone Command Units
6
The Model MNC-1 microphone is a hand-held, noise canceling microphone that is ideal for use as a local
microphone. The Model MSB-1 microphone is a base-station type microphone designed for desktop
operation.
The Model 300VSC-1 is intended to be installed indoors on a desktop or other flat surface.
The Model 300VSC-1044B is a rack-mountable unit complete with mounting hardware. It fits any standard
19-inch rack-mount cabinet.
The Model 300VSC can be used for a variety of prioritized signaling purposes, such as playing background
music, auxiliary fire alarm, evacuation alarm, start and dismissal, paging, and other emergency warning
applications. The system can be automated if external devices such as heat detectors, switches or program
clocks are connected to the remote control inputs. Additional advantages of the Model 300VSC include
economical system expansion along with long-term system flexibility.
The Model 300VSC generates and amplifies tone and audio signals and applies them through signal lines
to the remote SelecTone devices in the system. The Model AM25CK Connector Kit is required in each
SelecTone device to connect the them to the signal line. Speakers designed for 25-volt operation can connect
directly to the 25-volt output. The 300VSC has provisions for up to four SelecTone tone modules of your
choice. The tones are designated as Tone 1, Tone 2, Tone 3, and Tone 4. Each tone can be manually activated
locally by its associated pushbutton switch on the front panel or by a contact closure at the associated remote
control input. Whenever a tone is activated, either locally or remotely, its associated front panel pushbutton
LED lights to indicate that the tone has been activated. The LED remains lit until the tone is deactivated and
the contact closure is removed. All 300VSC controls are located on the front panel.
Product details and features are described in the next sections. For complete product specifications, see
Table 1 on pages 8 through 10.
Chassis Dimensions and Features
The Model 300VSC-1 is assembled in a black, brushed-aluminum, two-piece housing approximately
10.50 in (26.67 cm) wide by 9.25 in (23.50 cm) deep by 2.44 in (6.2 cm) high. It is intended to be placed
on any flat horizontal surface, or it can be wall-mounted using the wall mounting brackets supplied in
the accessory kit. The housing is held together with four screws: two on the bottom near the front and
two at the back near the terminal blocks.
The Model 300VSC-1044SB is assembled in a three-piece aluminum housing. The housing is painted
black and is 19.0 in wide x 10.0 in deep and 3.5 in high. This unit is installed in a standard 19-inch rack-
mount cabinet.
Front Panel Features
The front panel switches are designated as
TONE 1
through
TONE 4
,
AUX
,
TEST
, and
CANCEL
. The
tone corresponding to each switch can be labeled in the white area next to the switch with a permanent
felt-tip marker. If you are changing a tone or message, remove the marking by lightly rubbing it with a
rag dampened with denatured alcohol. To avoid damaging the switches, ensure that the alcohol does not
come in contact with them.
Summary of Contents for SelecTone 300VSC-1
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