RDL D-BZR Datasheet

ACCESSORIES

Models D-BZR

Audio Alert Module

 Audible Alert of A Remote Condition
 An LED Alarm Indicator
 A Front-Panel Reset Button
 Remote Reset Provision
 Momentary or Latching Operation
 Selectable Audio Level

The D-BZR is an audible alert module. The D-BZR may be mounted in a wall-box enclosure for use in walls or cabinets.

APPLICATION: The D-BZR is the ideal choice in installations requiring an audible alert.

Rear-panel terminals permit connection of a trip signal, a remote reset button, external power supply, and a
jumper to set the audible alert level. The D-BZR is activated when the TRIP input is momentarily connected to
ground. The BZR then sounds the alert and remains in the alert mode until reset by either the front-panel
RESET button, or by a remote reset button. Normally, the D-BZR latches in the alert mode. Alternately, the
D-BZR may be configured to sound the alert only while the TRIP terminal is grounded. This may be
accomplished by installing a jumper from the remote RESET to ground. For use in confined areas, the standard
alert may be too loud. The level may be reduced by removing a jumper provided on the rear-panel terminal
block.

A front-panel LED lights when the module is in the alert mode. If several D-BZRs are installed at a common
location, this visual indication shows the operator which unit is tripped.

The D-BZR power supply input accepts 24 Volts ac or dc. The D-BZR is a negative ground-referenced product.
In the unlikely event it is connected on a common 24 Vac supply together with equipment which is positive
ground-referenced and not transformer isolated, a ground fault may occur. The D-BZR automatically detects
such a fault and disconnects itself from the power input.

D-BZR

RDL  659 6th St.  Prescott, AZ., USA 86301  [phone]  FAX [phone]  www.rdlnet.com

ACCESSORIES

Model D-BZR

Audio Alert Module

RELAY OR SWITCH

TO RESET ALARM

RELAY OR SWITCH

TO TRIP ALARM

24 VDC/VAC

POWER

SOURCE

RESET

TRIP

GND

LOUD

24V DC

OR

24V AC

GROUND RESET TERMINAL

FOR MOMENTARY ALARM

RELAY OR SWITCH

TO TRIP ALARM

MOMENTARY OPERATIONLATCHING OPERATION

24 VDC/VAC

POWER

SOURCE

Installation/Operation

EN55103-1 E1-E5; EN55103-2 E1-E4

Typical Performance reflects product at publication time
exclusive of EMC data, if any, supplied with product.
Specifications are subject to change without notice.

REMOVE JUMPER ON

"LOUD" TERMINALS TO

LOWER ALARM VOLUME

IF A JUMPER IS PLACED

BETWEEN THE RESET

TERMINAL AND GROUND

TERMINAL THEN THE

ALARM WILL ONLY SOUND

WHILE THE TRIP TERMINAL

IS GROUNDED

RESET

TRIP

GND

LOUD

24V DC

OR

24V AC

REAR

LED INDICATES THAT

ALARM IS TRIPPED

PUSH RESET BUTTON

TO RESET ALARM

FRONT

TYPICAL PERFORMANCE

Control Inputs: TRIP and RESET (ground to activate)
Audible Alert: Approx. 4 kHz 85 dBspl @ 10cm (loud), or 75 dBspl @ 10cm (soft)
Power Requirement: 24 Vdc or ac @ 10 mA, Ground-referenced D-BZR
Dimensions: Height: 4.1 in. 10.4 cm Depth: 1.6 in. 4.1 cm Width: 1.3 in. 3.3 cm

REAR

891-5006I

Radio Design Labs Technical Support Centers

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