The Whelen Fixed Tonal Back-Up Alarm Series provides a consistent audible reverse warning for emergency vehicles, work trucks, utility fleets, municipal equipment, and heavy-duty commercial applications. Unlike the self-adjusting series, these models operate at a predetermined sound level, making them a straightforward choice when a fixed warning output is preferred.
Light-duty and heavy-duty configurations are available, with output levels ranging from 87 dB to 112 dB.. Lower-output models are well suited for pickups, service vehicles, and lighter fleet applications, while the 107 dB and 112 dB heavy-duty models are designed for louder environments and larger equipment.
Installation options include universal horizontal or vertical mounting as well as surface-mount configurations on applicable models. Depending on the selected alarm, electrical connections are available with either stud terminals or blunt-cut wire leads, giving installers flexibility based on the vehicle and installation location.
The alarms use a rugged glass-filled nylon housing with fully encapsulated electronics for resistance to moisture, vibration, and corrosion. Voltage ranges vary by output level, with configurations available from 12–24 VDC up to 12–80 VDC, making the series adaptable to a wide range of fleet and equipment electrical systems.
Standard fixed back-up warning tone
Light-duty sound-output options:
87 dB
97 dB
102 dB
Heavy-duty sound-output options:
107 dB
112 dB
Mounting options:
Universal horizontal or vertical mount
Surface mount on applicable models
Connection options:
Stud terminals
Blunt-cut wire leads
Voltage ranges by configuration:
87 dB — 12–80 VDC
97 dB — 12–24 VDC
102 dB — 12–24 VDC
107 dB — 12–36 VDC
112 dB — 12–36 VDC
Controlled through the vehicle’s reverse-light circuit or optional BUSW1 back-up switch
Glass-filled nylon housing
Fully encapsulated electronics
Resistant to:
Moisture
Vibration
Corrosion
Applicable SAE classifications:
Class B
Class C
Class D
Class F
Light-duty dimensions:
4.02" W × 2.74" H × 1.65" D
Heavy-duty dimensions:
5.20" W × 3.20" H × 2.88" D
The Whelen Fixed Tonal Back-Up Alarm Series provides a consistent audible reverse warning for emergency vehicles, work trucks, utility fleets, municipal equipment, and heavy-duty commercial applications. Unlike the self-adjusting series, these models operate at a predetermined sound level, making them a straightforward choice when a fixed warning output is preferred.
Light-duty and heavy-duty configurations are available, with output levels ranging from 87 dB to 112 dB.. Lower-output models are well suited for pickups, service vehicles, and lighter fleet applications, while the 107 dB and 112 dB heavy-duty models are designed for louder environments and larger equipment.
Installation options include universal horizontal or vertical mounting as well as surface-mount configurations on applicable models. Depending on the selected alarm, electrical connections are available with either stud terminals or blunt-cut wire leads, giving installers flexibility based on the vehicle and installation location.
The alarms use a rugged glass-filled nylon housing with fully encapsulated electronics for resistance to moisture, vibration, and corrosion. Voltage ranges vary by output level, with configurations available from 12–24 VDC up to 12–80 VDC, making the series adaptable to a wide range of fleet and equipment electrical systems.
Standard fixed back-up warning tone
Light-duty sound-output options:
87 dB
97 dB
102 dB
Heavy-duty sound-output options:
107 dB
112 dB
Mounting options:
Universal horizontal or vertical mount
Surface mount on applicable models
Connection options:
Stud terminals
Blunt-cut wire leads
Voltage ranges by configuration:
87 dB — 12–80 VDC
97 dB — 12–24 VDC
102 dB — 12–24 VDC
107 dB — 12–36 VDC
112 dB — 12–36 VDC
Controlled through the vehicle’s reverse-light circuit or optional BUSW1 back-up switch
Glass-filled nylon housing
Fully encapsulated electronics
Resistant to:
Moisture
Vibration
Corrosion
Applicable SAE classifications:
Class B
Class C
Class D
Class F
Light-duty dimensions:
4.02" W × 2.74" H × 1.65" D
Heavy-duty dimensions:
5.20" W × 3.20" H × 2.88" D
