Federal Signal’s 2012 Series Back-Up Alarms provide a dependable performance at an economical price for a variety of applications.

A wide selection of models meets a broad scope of decibel requirements
The 2012 Series back-up alarms are available in a wide range of decibel ratings including 87 dB(A), 97 dB(A) and 102 dB(A) models to meet precise warning requirements.  Each decibel version can be ordered with stud terminals or wires for added installation flexibility.  The stud models come equipped with a built-in universal mounting bracket and self-grounding strap.

Built to meet demands of many work environments
The 2012 Series Back-Up Alarms are epoxy-encapsulated to protect against moisture, vibration and the environment.  These alarms are steam-cleanable and pressure-washable, and are built with a heat-resistant, glass-filled nylon allowing them to handle the toughest commercial and industrial work environments.

Ready for a variety of applications
All models of the 2012 Series Back-Up alarms meet SAE J994, CE, OSHA and MSHA requirements. They are ideal for a variety of work truck applications including municipal fleets, utility, construction and OEMs.


Operating Voltage 12 VDC or 24 VDC
Conformance SAE J994, CE, OSHA and MSHA
Sound Output 210238-S - 87 dB(A)
210239-S - 97 dB(A))
210240-S - 102 dB(A)
210238-W - 87 dB(A)
210239-W - 97 dB(A)
210240-W - 102 dB(A)
Current Draw 210238-S - 0.3 Amps
210239-S - 0.3 Amps
210240-S - 0.5 Amps
210238-W - 0.3 Amps
210239-W - 0.3 Amps
210240-W - 0.5 Amps
SAE J994 Type 210238-S - D
210239-S - C
210240-S - F
210238-W - D
210239-W - C
210240-W - F
Dim. (L x W x H) 4.13 in (105 mm) x 1.25 in (32 mm) x 2.50 in (64 mm)

Ordering Information

Model Types
Model Description
210238-S 87 dB(A), 12/24 VDC, SAE J994 Type D, stud terminal
210239-S 97 dB(A), 12/24 VDC, SAE J994 Type C, stud terminal
210240-S 102 dB(A), 12/24 VDC, SAE J994 Type F, stud terminal
210238-W 87 dB(A), 12/24 VDC, SAE J994 Type D, wired model
210239-W 97 dB(A), 12/24 VDC, SAE J994 Type C, wired model
210240-W 102 dB(A), 12/24 VDC, SAE J994 Type F, wired model