Federal Signal Corporation Personnel Alerting System, Installation And Operation Instructions Manual

Page: 46 / 84

SYSTEM PLANNING
46
SECTION IV
4. SYSTEM PLANNING
4.1 Control Unit
The information in this section provides
the user with guidelines necessary for
installation.
Control Unit mounting location must first
be considered. The Control Unit NEMA
Type 1 cabinet must be mounted indoors
away from moisture and heavy dust or
contaminants. The controller contains
batteries, therefore the selected area
must have adequate ventilation to prevent
accumulation of explosive gas from the
batteries.
A light duty lockable hasp secures entry
to the cabinet. If additional security is
desired, the cabinet should be placed
behind a locked door.
The cabinet is suitable for wall mounting
with mounting slots on 12” to 16” centers.
The total weights of the Control
assembly, including user provided
batteries, are listed in the specification
section. Insure that the mounting surface
and fasteners can safely sustain the
weight of the assembly.
The Control system requires a 120VAC or
240VAC 50-60 Hz power source (model
dependent).
Several methods can be used to activate
the Control Unit. The Manual activation
switches and a handheld microphone can
be used to activate the Control Unit
locally. Landline control can be used
through normally open contact switches.
Connections should be made directly to
the motherboard terminal blocks. The
control can also be remotely activated via
the optional radio receiver or an external
600 ohm audio source.
If radio control is going to be used,
consider RF coverage and antenna
placement when selecting a suitable
location.
4.2 Speaker Placement
WARNING
The sound output of speakers is capable
of causing permanent hearing damage.
Ensure people are not exposed to sounds
exceeding 120 dB. Post warnings where
applicable.
As a general rule, the warning signal SPL
should be at least 10dB above the
ambient sound level to ensure it will be
heard. Speaker fidelity and placement will
also affect voice intelligibility.
Many factors affect the propagation of
sound through barriers, over various
types of materials, terrain, and changing
weather conditions. Consult FEMA
CPG1-17, CPG1-14 and your local
Federal Signal representative for