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Instant-On- Applying Ground to the ACTIVEZ terminal will cause the siren to operate in Day power mode. When
either the Police or Emergency Medical Siren Tones are selected (SW1 set to 0 or 2), applying Ground to both
the ACTIVEZ and the NUIT terminal will switch to Night power mode. Pressing the microphone Push-to-Talk
(PTT) button on models 4013 and 4025 will activate the Public Address function.
Instant Public Address - The Public Address function will override the siren function when the microphone
Push-to-Talk button is pressed (Models 4013 and 4025 only).
Automatic Short Circuit Protection- The siren will sense a short circuit on the speaker terminals and
automatically go to standby until the fault is removed. Once the fault is removed the siren will return to normal
operation.
Noise Canceling Microphone - A Plug-in noise canceling microphone (Models 4013 and 4025 only) is provided
for easy service or replacement.
Unpacking & Pre-installation
After unpacking your 4000 Series Siren, carefully inspect the unit and associated parts for any damage that may
have occurred in transit. Report any damage to the carrier immediately.
Installation & Mounting
The 4000 Series of Sirens is designed to be mounted inside a light bar or inside the vehicle. Do not mount the
siren inside the engine compartment. Mounting hardware is supplied (see Fig. 2) for mounting the amplifier
inside the light bar.
NOTE: Setups and adjustments will be made in subsequent steps that may require access to the siren. Plan
the installation and wiring accordingly.
Figure 1, Light Bar Mounting