Page 10 - BEST-Accessory-Technical-Bulletins

Purging & Pressurization Model RAB & RAH
Unit Accessories
Remote Alarm Devices

Typical Applications
Class I, Division 1 & 2
Model RAH, RAB & ERAB Alarm Beacons and Horns
are intended to provide local alarms for unit faults, high Alarm System Beacons & Horns
temperatures, loss of pressurization or ventilation and other
situations that require immediate attention from local operators
and maintenance staff members. They work in conjunction Technical Bulletin RAD TB-R0 © 06.08.2018
with any Unit featuring a pressure loss alarm switch, and may
also serve as common alarms for other equipment.

RAH-1 Horn Description

Model RAH-1 horns provide an electrically generated audible
alarm. Corrosion resistance is achieved with a copper–free
cast aluminum housing, and this horn features a vibrating
stainless steel diaphragm. The horn is rated for Class I or II,
Division 1 or 2 hazardous locations, can be pendant or wall
mounted and features a 3/4” female conduit port. The horn
has a 100 dBa output at a distance of 10’ with a 5 minute duty
cycle, and the 120 VAC and 240 VAC versions feature an
internally mounted volume control for field adjustment.

RAH-2 Horn Description See
Model RAH-1-P-C mounting
and dome
Model RAH-2 horns produce sound by the electro–mechanical guard options
vibration of a stainless steel diaphragm. The housing is water ALARM HORN on Page 2
and dust–tight, making it suitable for indoor or outdoor use.
The horn can be pendant or wall mounted and features a die– Model RAB-1-C-C
cast zinc housing with a corrosion–resistant polyurethane ALARM BEACON
finish. This horn is rated for Class I & II, Division 2 hazardous
locations, produces 100 dBa at a distance of 10’, produces
sustained or coded tones, and includes a fused terminal block
connection.

RAB-1 Beacon Description

Model RAB-1 beacons provide visual alarms at 80 high–
intensity flashes per minute. The beacon is formed from
cast aluminum with an epoxy finish, is corrosion resistant
and features a strobe tube bulb rated for 10,000 hours.
The beacon is rated for Class I or II, Division 1 hazardous Model RAH-2-S-C
locations, offered in pendant, wall or ceiling mounting styles ALARM HORN
with 3/4” female conduit ports and an optional dome guard.

RAB-2 Beacon Description
Model RAB-2-P-C
Model RAB-2 has an LED lamp rated for 50,000 hours ALARM BEACON
with 60 high intensity flashes per minute or a steady burn.
This beacon is rated for Class I or II, Division 2 hazardous CERTIFIED
locations, has a 2,000,000 peak candlepower rating. It
features a red fresnel lens and dome guard and is available in
pendant or ceiling mounting styles.

ERAB-2 Beacon Description
Certifications vary
Model ERAB-2 is an economical alternative, has a strobe Please see Page 2
tube rated for 10,000 hours with 80 high intensity flashes per
minute or a steady burn. This beacon is rated for Class I or II, Contact our factory for optional
Division 2 hazardous locations, features a red lens and globe Model RAB-1 & RAB-2 dome guards and Model ERAB-2-P-C
guard and is available in a pendant mounting style. alternate Model RAB and ERAB dome colors! ECONOMY ALARM BEACON