Federal Signal Corporation 50GC Instructions D'installation page 4

3. Surface Mounting.
Surface mounting the 50GC in an NB or NBL box is accomplished using the
50GC adapter, adapter gasket, and the 8-32 x 3" oval head screws. Use figure 2 as
a guide.
4. Flush Mounting.
As shown in figure 3, flush mounting can be accomplished with the use of a Fed-
eral Model FBL Wall Box and a Model FG Trim Plate. Attach the trim plate to the
front of the 50GC by removing the two 8-32 x 1/2" Phillips head screws from the
50GC, and attach the trim plate to the 50GC with the same two screws. This as-
sembly can then be installed in the FBL box that has already been
mounted on the wall. Use two 8-32 x 3" slotted head screws to hold the 50GC/FG
assembly in the FBL box. Use four #10 x 1" round head screws for back box
mounting.
F. Power Connections.
On single unit installations, connect one of the power leads through an on-off switch.
An on-off switch is not used when the units are installed as part of a SelecTone Sys-
tem using a Model 300SSC SelecTone Command unit. When the unit is to be oper-
ated from an AC source, connect the black power leads to the phase side of the line
and the white leads to the common side of the line.
Audio wires should be sized properly by your licensed installation electrician for your
service application. This cable requires a twisted shielded pair with an 18AWG minimum
and should produce no more than 15% signal loss over the length of the cable run.
G. Tone Module Installation (Single tone, switched power).
See figure 4. Insert the tone module into the receptacle, at the rear of the 50GC, with
the foil side of the circuit board toward the speaker. Make sure that the tone module
connector is fully inserted and that the top edge of the module is beneath the clip.
Ensure that the unit is working correctly after installation.
H. Connector Card Installation (Multiple tone and voice, continuous power).
See figure 4. Insert connector card into the receptacle at the rear of the Model 50GC,
with the foil side of the circuit board toward the speaker (make sure that the con-
nector card is fully inserted into the receptacle and that the top edge of the card is
beneath the clip).
A 300CKS or 300CK Connector Kit is used when the Model 50GC is used as part
of a system having a SelecTone Command unit. Power must be applied continu-
ously to the 50GC. Refer to the instructions supplied with the appropriate SelecTone
Command unit. For the 300CK, refer to Federal Signal Part No. 2561044 (Model
300VSC-1 SelecTone Command) or Federal Signal Part No. 2561090 (Model
300SCW-1 SelecTone Command). For the 300CKS, refer to Federal Signal Part No.
255A204 (Model 300SSC Supervised SelecTone Command). Verify that the system
is working correctly after installation.
For the AM25CK and AM70CK, follow the wiring instructions supplied with the
connector card and verify that the unit is working correctly when the wiring has
been completed. Connect one pair of white leads from the connector card to the au-
NOTE
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