An Overview Of The Model 300Mb; Figure 1 Dimensions And Mounting Holes - Federal Signal Corporation D1 Series Installation And Maintenance Manual

Installation and Maintenance Manual

An Overview of the Model 300MB

The CommCenter, Model 300MB Series D1 is a digital playback device that is capable of generating up
to six different prerecorded voice messages, melodies, tones, and/or signals. This central control device
interfaces with any decentralized or centrally amplified system. The CommCenter can control signal lines to
Federal Signal SelecTone® Models 300GC, 300GCX, 300X, 302GC, 302GCX, 302X, and 50GC speaker/
amplifiers. It can also interface with any SelecTone Control Unit, Models 300VSC or 300SCW-1. It can
directly drive speakers designed for 25 Vrms line operation. It can also provide a 1 Vpp audio signal, and can
be used as a remote audio input for a public address sound system. Using the cascading function, 300MB
CommCenters can be linked together to provide a system with the capability of more than six messages.
NOTE:
The CommCenter accepts messages stored on ICs and pluggable circuit boards. Both are referred to
as message chips in this manual. The messages stored on pluggable circuit boards will operate on all Series B,
Series C, and Series D models.
IMPORTANT:
The Series D CommCenters use a different storage IC than the Series A, Series B, and Series
C. These ICs cannot be interchanged between Series A, Series, B, and Series C models. Make sure to specify
which series CommCenter you have before ordering any additional messages.
The CommCenter is intended to be installed only in indoor (NEMA 1) or other protected installations. It
can be mounted on any horizontal or vertical surface using #10 screws, appropriate for the type of mounting
surface material, and the four mounting holes in the housing (see Figure 1).
KNOCKOUT PROVISION
0.87 in (2.21 cm) DIA., 5 PLACES
FIELD WIRING BLOCK FOR
120/240 V POWER CONNECTION
2.27 in
(5.77 cm)
1.06 in
(2.70 cm)
1.08 in
(2.74 cm)
2.86 in
(7.26 cm)
3.57 in
(9.07 cm)
290A7328
6

Figure 1 Dimensions and mounting holes

1.28 in
(3.25 cm)
2.20 in
(5.59 cm)
3
9.41 in
(23.90 cm)
6.77 in
(17.20 cm)
4
1.18 in
(3.00 cm)
COVER REMOVED TO SHOW FOUR MOUNTING HOLES 0.20 in (51 cm) DIA., FOR #10 SCREWS
Model 300MB-SD CommCenter Series D1
11.57 in
(29.40 cm)
9.75 in
(24.77 cm)
2.15 in
(5.46 cm)
2
6.87 in
(17.45 cm)
1