Bosch HS4-241575W-FW Specsheet

Fire Alarm Systems | HS4‑241575W‑FW Fixed‑candela Horn Strobe (white)

HS4‑241575W‑FW Fixed‑candela Horn
Strobe (white)

www.boschsecurity.com

u 24 VDC, filtered or FWR

u Listed at 15 cd, but provides 75 cd on axis

This Wheelock horn strobe is UL Listed for indoor
wall‑mount applications. The strobe is listed at 15 cd,
but provide 75 cd on axis. The horn provides a
continuous horn tone or temporal (Code 3) horn tone
with three selectable sound output (dBA) settings for
each tone . The temporal tone can be synchronized by
using an SM (single) or DSM (dual) Synchronization
Module or a compatible control panel. The strobe and
horn circuits can be operated independently.

Certifications and approvals

Region Certification

USA UL ULSZ: Audible Signal Appliances

(UL464), UUKC: Signaling Appliances
and Equipment for the Hearing Impaired
(UL1971)

CSFM see our website

Installation/configuration notes

Compatible Products

The following products are compatible with the HS4
Horn Strobes:

u Continuous or temporal (Code 3) horn tones

u Selectable dBA settings (high, medium, or low)

u Easy wall mounting on a variety of back boxes

Category Product ID Product Description

Control

D7022

1

Conventional FACP

Panels

D7024

2

Addressable FACP

D7024 Conventional FACP

D8024

D9124

D10024A

1

1

1

Analog FACP

Addressable FACP

Analog FACP

FPA-1000 Analog Addressable FACPs

FPD-7024

2

Addressable FACP

FPD-7024 Conventional FACP

Modules SM‑12/24‑R Synchronization module (red)

DSM‑12/24‑R Dual synchronization module (red)

1

For synchronization, use the SM or DSM
Synchronization Modules. The synchronization module
must be set for 24 VDC operation. When used, the
D7022 must be set for 24 VDC operation.

2 | HS4‑241575W‑FW Fixed‑candela Horn Strobe (white)

2

When used with a D7039 Multiplex Expansion
Module, the D7024 and FPD-7024 become
addressable fire alarm control panels (FACPs).

Mounting Considerations

Indoor Applications
Mount these HS4 Horn Strobes on the indicated back
boxes for the indicated applications:

Conduit

Applications

Surface
Mounted

Flush
Mounted

Double‑gang •

Four‑inch square •

100‑mm European •

1

IOB

• •

SHBB‑R • •

1

Although the IOB Back Box is an indoor or outdoor
box, the HS4 Series Horn Strobes are only UL Listed
for indoor applications.

Wiring

Notice

The horn circuit of these horn strobes can be used
on coded systems where the applied voltage is
cycled on and off, but the strobe circuit cannot.

The input terminals accept wires with diameters
between 18 AWG and 12 AWG (ISO 0.75 mm2 and
4 mm2).

Strobe only: 15 cd: 102 mA

30 cd: 155 mA
75 cd: 253 mA
110 cd: 347 mA

Voltage (input) 24 VDC nominal filtered or FWR;

16 VDC to 33 VDC

Environmental

Relative Humidity: Up to 95%, non‑condensing

Temperature (Operating): +32°F to +120°F (0°C to +49°C)

Mechanical

Candela Selections: 15 cd, 30 cd, 75 cd, or 110 cd

Dimensions (H x W x D): 4.125 in. x 4.125 in. x 1.25 in.

(10.5 cm x 10.5 cm x 3.2 cm)

Material: Molded plastic enclosure incorporating a

Xenon flashtube and Lexan lens

Horn Ratings at 24 VDC

Continuous Horn

Reverberant dBA at 10 ft (3 m) per
UL464:

High: 91 dBA
Medium: 88 dBA
Low: 83 dBA

Temporal (Code 3) Horn

Reverberant dBA at 10 ft (3 m) per
UL464:

High: 87 dBA
Medium: 84 dBA
Low: 79 dBA

Parts included

Quant. Component

1 Horn strobe

1 Hardware pack

1 Literature pack

Technical specifications

Electrical

Current (maximum) VDC

Audible only: High dBA: 110 mA

Medium dBA: 68 mA
Low dBA: 27 mA

Strobe only: 15 cd: 60 mA

30 cd: 92 mA
75 cd: 165 mA
110 cd: 220 mA

Current (maximum) VFWR

Audible only: High dBA: 94 mA

Medium dBA: 50 mA
Low dBA: 41 mA

Notice

The sound output for the Temporal (Code 3)
mode is rated lower than in Continuous mode
because the time that the horn is off is averaged
into the sound output rating. When the horn
produces a tone in Temporal mode, its sound
pressure is the same as the Continuous mode.

Trademarks

All hardware and software product names used in this
document are likely to be registered trademarks and
must be treated accordingly.

Ordering information

HS4‑241575W‑FW Fixed‑candela Horn Strobe (white)

This white horn strobe is UL Listed for indoor
wall‑mount use at 15 cd (75 cd on axis) and temporal
(Code 3) or continuous horn tone with three
selectable sound output (dBA) settings for each tone.
Synchronize the temporal code using an SM (single) or
DSM (dual) module or a compatible control panel.

Order number HS4-241575W-FW