Bosch GEH24-R, GEH24-W Specsheet
Fire Alarm Systems | GEH24 Low‑frequency Horns
GEH24 Low‑frequency Horns
www.boschsecurity.com
u Evacuation tone
u Use the SuperSlide feature for easy testing
u Wide voltage range; 16 to 33 VDC or FWR
The Gentex Commander² Low‑frequency Horns
(GEH24) offer a dependable audible alarm and a low
current draw.
Functions
Easy Installation and Testing
The user can wire then install the entire system,
reducing installation and operating costs. Use the
SuperSlide feature to test supervision.
Horn Output
The horns provide a selection of high or low volumes
with a peak sound of 100 dBA or greater at 10 ft
(3 m). They offer a choice between a 2400 Hz (remote
signaling) tone or a broadband low frequency
(1500 Hz to 3000 Hz) mechanical sounding
(evacuation) tone where closed doors could prevent
hearing the other tone. The user can also select either
continuous or temporal Code 3 tone output, and
synchronize the temporal signal by using the AVS
Series Synchronization Modules or a compatible
control panel.
Certifications and approvals
GentexCorporation holds these Listings and
Approvals:
u Select high or low frequency, high or low volume,
and temporal Code 3 or continuous tone pattern
u Wire then install the entire system
Region
Certification
USA UL ULSZ: Audible Signal Appliances
(UL464), ULSZ7: Audible Signal Appliances Certified for Canada (cULus)
FM
CSFM see our website
Installation/configuration notes
Compatible Products
The following products are compatible with the GEH24
Horns:
Category Product ID Product Description
Control
D7022
1
Conventional FACP
Panels
D7024
2
Addressable FACP
D7024 Conventional FACP
D8024
D9124
D10024A
FPD-7024
3
3
3
2, 4
Analog FACP
Addressable FACP
Analog FACP
Addressable FACP
FPD-7024 Conventional FACP
2 | GEH24 Low‑frequency Horns
Modules AVS‑44 Synchronization module (red)
AVS44‑W Synchronization module (white)
AVSM‑R Synchronization module (red)
AVSM‑W Synchronization module (white)
1
The D7022 must be set for 24 VDC operation and
requires the AVS44 or AVSM Synchronization Modules
for synchronization.
2
When used with a D7039 Multiplex Expansion
Module, the FPD-7024 and D7024 become
addressable FACPs.
3
For synchronization, use the AVS44 or AVSM
Synchronization Modules with these control panels.
4
The FPD-7024 is not UL864 9th edition approved for
use with the Gentex synch protocol.
Mounting Considerations
Outdoor Applications
For an outdoor application or a severe environment
(NEMA 3R) application, the GEH24 Series Horns must
be surface mounted on a flat wall in a GOE Outdoor
Enclosure. Use a watertight conduit fitting.
Indoor Applications
Install the horns with their tops at least 90 in. (2.3 m)
above the floor and no closer than 6 in. (15.2 cm) to
the ceiling. The horns are equipped with a four‑inch
square mounting plate that can be attached as follows:
Conduit
Applications
Single‑gang
Double‑gang
Four‑inch square
GSB
GOE
•
• • •
• • •
• •
•
*
Surface
Mounted
•
Semi‑flush
Mounted
•
* The GOE Outdoor Enclosure has knockout holes
sized for half‑inch conduit and matching connector.
Use a watertight conduit fitting.
Shipping Information
The horns are delivered from the factory set to the
temporal lower frequency mode. Also included is a
locking mechanism that secures the product to the
bracket without any screws showing.
Wiring
The input terminals accept wires with diameters
between 18 AWG and 12 AWG (ISO 0.75 mm2 and
4 mm2).
Parts included
1 Hardware pack
1 Literature pack
Technical specifications
Electrical
Voltage Range: 16 VDC or FWR to 33 VDC or FWR
Voltage (Input): 24 VDC or FWR nominal
Environmental
Relative Humidity Up to 93% non‑condensing
Temperature (Operating): +32°F to +120°F (0°C to +49°C)
Mechanical
Dimensions (H x W x D): 5.0 in. x 4.5 in. x 2.5 in.
(12.7 cm x 11.4 cm x 6.4 cm)
Alarm Ratings
Horn (Continuous, 2400 Hz)
Audible Device Current (maximum): 28 mA RMS;
48 mA FWR
Sound output at 10 ft (3 m) at 24 VDC: High output: 86 dBA
Low output: 78 dBA
Horn (Continuous, Mechanical)
Audible Device Current (maximum): 25 mA RMS;
44 mA FWR
Sound output at 10 ft (3 m) at 24 VDC: High output: 84 dBA
Low output: 76 dBA
Horn (Temporal Code 3, 2400 Hz)
Audible Device Current (maximum): 28 mA RMS;
48 mA FWR
Sound output at 10 ft (3 m) at 24 VDC: High output: 83 dBA
Low output: 75 dBA
Horn (Temporal Code 3, Mechanical)
Audible Device Current (maximum): 25 mA RMS;
44 mA FWR
Sound output at 10 ft (3 m) at 24 VDC: High output: 81 dBA
Low output: 73 dBA*
Chime (Continuous)
Audible Device Current (maximum): 15 mA RMS;
30 mA FWR
Sound output at 10 ft (3 m) at 24 VDC: High output: 71 dBA*
Low output: 68 dBA*
Quant. Component
1 Horn with finish plate
1 Die‑cast mounting plate
1 Plastic test card
Chime (Temporal Code 3)
Audible Device Current (maximum): 15 mA RMS;
30 mA FWR
Sound output at 10 ft (3 m) at 24 VDC: High output: 71 dBA*
Low output: 68 dBA*
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