Product Specifications - Federal Signal 253-012-048 Instrucciones De Instalación Para

Introduction
The Model 253-012-048 self-adjusting backup alarm is a solid state
audible warning device enclosed in a weatherproof housing. When
activated, the backup alarm produces a tone with a sound intensity of
107 to 82 dBA at 4 feet. This tone is interrupted at a rate of approxi-
mately 80 times per minute with equal on and off times.

Product Specifications

Physical
Electronics
Sealing
Housing
Net Weight
Dimensions
Operating Temperature –40 °C to +77 °C
Electrical:
Operating Voltage
System Voltages
Operating Current
Fuse at
Spike Protection
Polarity
Connection
Output:
Sound Level*
Pulse Rate
*Automatic to provide 10 ± 4 dBA above ambient noise. 107 ± 4 dBA
maximum at 4 feet with 28 Vdc applied and with 97 dBA of white
noise. 82 dBA typical with no ambient noise. Slightly lower on lower
voltages.
Solid state
Encapsulated to protect from dust, mois-
ture and vibration
Steam cleanable, weatherproof plastic
1 lb 7 oz
3.06" H x 5.00" W x 3.78" D
9.8 Vdc to 57.6 Vdc
12 to 48 volt systems
0.25 A
0.5 A
+100, –400 volts
Positive or negative ground, polarity pro-
tected
Two #8-32 UNC terminal studs
107 to 82 dBA at 4 ft
80 pulses per minute typical
2