7
General Description
Description, Specifications, Installation, Operation, and Service Manual
Federal Signal
www.fedsig.com
General Description
This manual describes the characteristics, specifications, installation for the siren as
well as the additional information required to operate, service, and maintain the control
system.
The Federal Signal Model 2 outdoor warning sirens are omni-directional sirens that are
capable of producing high-intensity warning signals over a large area. Federal Signal
provides mounting hardware that enables you to install a siren on a utility pole or on the
roof of a building. As a result, the siren can be installed in almost any situation. The high
efficiency of these siren models enables them to produce a high sound level while making
moderate demands on the power source.
Siren Description
The Model 2 Siren is a 102 dB single tone siren.
The Model 2 siren mechanism is enclosed in a sheet metal housing. A conical dome is
mounted on the top of the housing and two truncated conical cowls are attached to the
housing, approximately one-third and two-thirds along the height of the housing.
A Model RC2W Motor Starter is required to operate the siren. The Model 2 uses a 120-
or 240-volt universal motor that can operate from either DC or 25-60 Hz single-phase
AC.
The mechanism of all siren models covered in this manual consists of a vertically
installed motor with a stator attached to the motor housing, and a rotor mounted on the
drive shaft concentric to the stator. The rotor and stator each contain at least one row
of ports. As the motor rotates the rotor, air is drawn through an intake tube and passes
through the rotor and stator ports in pulses. These pulses are produced because the
rotor alternately opens and closes the stator ports. The pulses of air produce sound at a
frequency (pitch) that is dependent on the instantaneous rotational speed of the motor and
the number of ports in the rotor-stator combination.
A Model RC2W Motor Starter is required to operate the siren. The Model 2 uses a 120-
or 240-volt universal motor that can operate from either DC or 25-60 Hz single-phase
AC.
Controls Description
Models RC2W-120 (120 Vac) and RC2W-240 (240 Vac)
The Model RC2W Motor Starters are basically heavy-duty relays that are required for the
starting and operating current of a Model 2 siren. The RC2W is enclosed in a NEMA type
3R enclosure. The unit must be installed on a vertical surface.
Models FC (One-way status) or FCTB (Two-way status) Controllers
The FC or FCTB siren controllers provide RF and/or wire line control of individually
programmable timing cycles for contact closure outputs. The versatility of the FC
Controller makes it an ideal choice for virtually all siren control applications or any other
process that can be controlled through relay contacts.
