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Chapter 8
Operating the e-Q2B-CAL Siren System
This chapter describes the CAL model siren controls and how to operate them. For instructions on
operating the standard eQ2B siren system, see Chapter 7 on page 41. The e-Q2B-CAL Siren System is
controlled through the control head, which has a rotary switch, four push buttons, and one volume control
for public address. Some siren functions can be controlled by either the control head or foot switches. The
foot switches, which are purchased separately, connect to the front of the siren amplifier. For information
on wiring foot switches, see “Connecting the Foot Switches for Cycle, Brake, and Air Horn” on page 18.
SOUND HAZARD—All effective sirens and horns produce loud sounds (120 dB) that
may cause permanent hearing loss. Always minimize your exposure to sound of
the siren and horn, and wear hearing protection. Do not sound the siren and horn
indoors or in enclosed areas where you and others will be exposed to the sound.
Figure 8.1 Control head push buttons, rotary switch, and PA volume control
AIR
HORN
CYCLE
OFF
MANUAL
WAIL
YELP
BRAKE
VOLUME
RADIO
290A6829
Siren Tones
The selector switch positions are OFF, MANUAL, WAIL, and YELP. WAIL produces a continuous wailing
up-and-down tone with the distinctive “Q” sound. YELP produces a continuous, rapid warbled tone. For a
loud burst of traffic-clearing sound, push and release the AIR HORN push button or foot switch.
Siren Priorities
A priority level is assigned to each siren function. The functions are PA, Radio Rebroadcast, Air
Horn, Cycle, Wail, Yelp, Brake, and Manual. If two siren functions are simultaneously requested, the
one with higher priority is activated. Lower priority siren functions are overridden by higher priority
siren functions. For example, when WAIL is selected and the AIR HORN push button or foot switch is
e-Q2B Siren System
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