Technical data
Colour	Light grey (similar to RAL-7035)
Dimensions (Ø x H)	Ø 212 x 280 mm (without brackets)
Sound pressure level (SPL) 1 W/1 m	108 dB
Base impedance	8 Ohm
Frequency range (±10dB)	340 - 9.000 Hz
Material	ABS plastic UL94V0
Degree of protection DIN 40050	IP 66
Adjustments at 100 V	30/15/7,5/3,25 W
Shape	Funnel
Rated load capacity (program)	30 W (40 W)

The alarm pressure chamber loudspeaker from manufacturer RCS Audio-Systems, type PHS-81T30BS, is a certified device for use in voice alarm systems. It was specifically developed for use in certified systems and meets the requirements of standards EN 54-24:2008 and BS 5839, which apply to safety and reliability in fire protection systems. The loudspeaker is intended for use in buildings with high safety requirements and is suitable for both indoor- and outdoor sound systems.

Applications

The loudspeaker is primarily designed for voice alarm systems, where clear and understandable transmission of alarm and evacuation instructions is critical. High speech intelligibility is achieved through a wide frequency range of 340 to 9,000 Hz and a high sound pressure level of 108 dB at 1 W/1 m. This ensures good reproduction even over long transmission distances, which is advantageous in large halls, industrial facilities, or public buildings. Certification to EN 54-24 and BS 5839 ensures compliance with necessary safety standards.

Functions and Equipment in Detail

The loudspeaker features a ceramic terminal, enabling a secure and corrosion-resistant connection. A thermal fuse protects the device from overheating, and the heat-resistant cable ensures reliable cable routing even at elevated temperatures. These components meet the requirements of BS 5839 and increase operational safety. The adjustments for 100 V operation (30 W, 15 W, 7.5 W, 3.25 W) allow flexible integration into existing 100 V networks, commonly used in many alarm systems.

Technology Explained Simply

The loudspeaker operates with a nominal impedance of 8 Ohm and a rated power handling of 30 W (program power), with a peak power of 40 W possible. The protection rating IP66 according to DIN 40050 means the device is dust- and waterproof, making it suitable for outdoor use or in damp indoor environments. The waterproof construction with two PG cable glands allows easy cable threading to the next loudspeaker without requiring additional connection cables. The housing is made of flame-retardant, impact-resistant, and weather-resistant ABS plastic UL94V0 in the color Light Grey (similar to RAL-7035), ensuring high mechanical and chemical resistance.

Compatibility and Accessories

The loudspeaker is designed for use in 100 V networks and can be combined with other devices of this voltage class. The adjustments for 100 V operation (30/15/7.5/3.25 W) allow flexible power adaptation according to requirements. The waterproof PG cable glands support cabling in a chain, which is typical for voice alarm systems. Certification to EN 54-24 and BS 5839 ensures the device can be used in systems complying with these standards.

Mounting and Installation

Mounting is done via a fully foldable U-bracket made of stainless steel V2A, enabling simple and secure attachment to ceilings or walls. The screws are also made of stainless steel V2A, increasing corrosion resistance. The external dimensions are Ø 212 x 280 mm (without bracket), which must be considered during installation planning. The installation manual is included in the delivery scope and supports correct installation.

Operational Advantages

The loudspeaker offers high operational safety due to the IP66 protection rating and integrated safety features such as thermal fuse and ceramic terminal. The high speech intelligibility and stable sound pressure ensure clear transmission even in large rooms. The weather-resistant construction and flame-retardant housing increase lifespan and reliability in demanding environments. The simple mounting via the foldable bracket reduces installation effort.

Delivery Contents

The delivery includes the pressure chamber loudspeaker PHS-81T30 BS, the stainless steel V2A mounting bracket, and the installation manual.

Certification and Standards

The loudspeaker is certified to EN 54-24:2008 and meets the requirements of the British Standard BS 5839. These certifications are essential for use in fire protection systems and guarantee compliance with safety regulations. Certification was performed by a notified product certification body, confirming the credibility of the certification.

Material and Color

The housing is made of ABS plastic UL94V0, a flame-retardant, impact-resistant, and weather-resistant material. The color is Light Grey (similar to RAL-7035), allowing unobtrusive integration into many environments. The weight is approximately 2.05 kg, which should be considered during installation.

Protection Rating and Operating Conditions

The protection rating IP66 according to DIN 40050 means the device is dust- and waterproof, making it ideal for outdoor use or in damp indoor environments. The waterproof construction with two PG cable glands allows cable threading to the next loudspeaker, simplifying installation.

Certification and Standards

Certification to EN 54-24:2008 and BS 5839 is essential for use in fire protection systems. Certification was performed by a notified product certification body, confirming the credibility of the certification.

Material and Color

The housing is made of ABS plastic UL94V0, a flame-retardant, impact-resistant, and weather-resistant material. The color is Light Grey (similar to RAL-7035), allowing unobtrusive integration into many environments.

Protection Rating and Operating Conditions

The protection rating IP66 according to DIN 40050 means the device is dust- and waterproof, making it ideal for outdoor use or in damp indoor environments. The waterproof construction with two PG cable glands allows cable threading to the next loudspeaker, simplifying installation.