1-1
SECTION 1
CHARACTERISTICS
Figure 1-1. Model 2001DC.
1-1. SCOPE OF THIS MANUAL.
This service manual describes the characteristics, specifications, installation, and
service and maintenance of the Federal Model 2001DC Control Unit/Battery Box.
1-2. CONTROL UNIT/BATTERY BOX DESCRIPTION.
The Control Unit/Battery Box consists of two cabinets, which are channel mounted for
ease of installation (see figure 1-1). The upper cabinet (NEMA 4 enclosure) houses the
necessary electronics and controls for producing the siren signals, and the charging system
for the four 12 volt batteries.
The lower cabinet (vented NEMA 4 enclosure) houses four maintenance free, lead-acid,
deep-cycle, rechargeable batteries. The lower and upper cabinets are interconnected via
liquid-tight conduit, which is sealed to prevent harmful vapors from entering the control
area. Four batteries are connected in series to provide 48VDC operating power to the siren.
The chargers in the upper cabinet operate on 120VAC to keep the batteries charged. This
arrangement, continues to provide power to the siren, as specified in section 2-1., even in the
event of a power failure.
The 2001DC has ten separately fused circuits to protect the siren controller. Two AC
power fuses (F1 & F2) protect the chargers and optional battery warmers respectively. The
main siren motor is protected by F3, a 200A DC fuse. The rotator motor is fused by an in line
fuse connected to K1. The contactor coils are fused with in line fuses. The charger output
wires are also individually protected with in line fuses (see fig. 3-6).
