1
SECTION I
CHARACTERISTICS
Figure 1-1. Model 2 Siren
1-1.
SCOPE OF THIS MANUAL
This service manual describes the characteristics, specifications, installation, controls, theory of operation
and servicing of the Federal Signal Model 2 Outdoor Warning Siren.
1.2. GENERAL
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 the user 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.
1-3. SIREN DESCRIPTION
The Model 2 Siren (Figure 1-1) is a 102dB 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 25-60Hz single-phase AC.
1.4. MECHANICAL DESCRIPTION
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
