e-Q2B Siren System
47
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 43. 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 19.
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
BRAKE
CYCLE
RADIO
VOLUME
OFF
MANUAL
WAIL
YELP
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 activated,
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