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Acoustic Studies for Hazardous Environments

PAGA amplifier - highly resilient, highly efficient, life safety system

ZIZTEL - TRUE A+B PAGA SYSTEM INTEGRITY. MISSION CRITICAL BROADCAST SYSTEMS.

This short video from Ziztel illustrates the importance of full A+B system integrity throughout a P.A.G.A installation. ZIZTEL design and manufacture communications systems for life-safety critical applications; primarily for defence, oil and gas and nuclear industries. Our hardware has been specifically designed to align with mission-critical safety level certifications. For life-safety systems, high-integrity principles must be designed into the equipment from inception, and cannot be retrospectively added. Importantly, inadequate packages utilising general purpose hardware or intercom services cannot deliver the levels of integrity required for a life-safety system. An example of a poorly implemented AB system is where one intercom or access panel has been connected to a primary and secondary amplifier. Conversely, all Ziztel A+B equipment, implements various techniques and measures to provide comprehensive integrity throughout the life-safety system. Ziztel access units are true AB integrative devices, with the fundamental capability to serve dedicated AB circuits, integrating with system supervisory monitoring and management. A+B integrative devices feature dual circuit system indicators, dual voice coils, dual processors and power supplies. Membrane-keypad button-indicators provide A+B status per zone. The software layer used on our PCAP and PAWS units also displays the dual circuit status. The second aspect of A+B integrity relates to site installation principles. Microphone input, status and control access facilities are fully duplicated A+B. Dedicated A+B circuits have coverage to serve the same area where personnel occupy, according to prior acoustic site study. This means a minus 3 decibel sound pressure reduction with either A+B subsystems affected by a fault condition. A+B rack equipment should ideally be separated by a minimum A60 firewall. A+B field cable networks should be segregated, following isolated routes through transits, raceways and ducts where possible. Finally, the sub-systems are fully autonomous and have no interdependence. This completes our introduction to the Ziztel A+B high-integrity P.A.G.A system for industrial sites.

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www.ziztel.com

HARD-CORE PROCESSOR. MISSION CRITICAL BROADCAST SYSTEMS.

A P.A.G.A. system is the only means of efficiently warning personnel of dangerous conditions on an industrial complex. Safety of life depends on the reliable and immediate delivery of site-wide emergency instructions and general alarm warning signals. For example; Toxic gas inhalation can kill within seconds, mandating system availability at all times to ensure speedy evacuation of site personnel. The Ziztel voice alarm solution is designed specifically for mission-critical applications. Aligning with major safety-integrity level regulations. The system employs a hard-core processing kernel, which eliminates boot-up delays and completely removes cyber-attack risks; thereby ensuring P.A.G.A. security throughout the life of the plant. Unlike general purpose computing hardware, the Ziztel hard-core processor eliminates lengthy boot-up routines and ensures timely delivery of both vital life-saving broadcasts and warning signals. "Emergency - Please make your way to the assembly point."

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www.ziztel.com

ZIZTEL - CLASS G HOT-SWAP AMPLIFICATION.
High-density Power Hot-Swap Class-G Amplification.

Description:
A P.A.G.A. system is the only means of efficiently warning personnel of dangerous conditions on an industrial complex. As such, it is considered a prime life safety critical package. Core to system operation is the Ziztel CLASS-G; high-power-density, hot-swappable loudspeaker amplifier module. In the event of amplifier service, an N plus 1 configuration ensures automatic no break P.A.G.A capability. Hot standby amplifiers can be assigned on a 1 to 4, 1 to 8 or 1 to many execution.

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www.ziztel.com

ZIZTEL - ACOUSTIC HOODS - AH2/AH23/AH26
Plus ATEX/IECEx Hazardous Area associated devices.

English Transcript:
This video from ZIZTEL is an introduction to our series of acoustic hoods and shelters for industrial sites. ZIZTEL design and manufacture communications systems for life-safety critical applications; primarily for defence, oil and gas and nuclear industries. The ZIZTEL acoustic hood is designed to facilitate intelligible two-way speech communication in high-noise ambient environments. Each unit has been specifically designed to provide reliable service and minimal maintenance in aggressive climatic and atmospheric conditions. Ziztel offers two levels of sound attenuating hoods, as well as standalone shelters - fitted without an acoustic membrane. All units are weatherproof for outdoor installation, including the saline resistant acoustic membrane which offers up to 26 decibels of noise attenuation. The hoods enable equipment to be mounted to the back panel and feature a spacious shelf for writing. The entry is large enough to accommodate a single person in full PPE and headgear. The glass-reinforced polyester rigid shell is corrosion-proof, UV resistant and colourfast. Strobe beacons can also be provided and fitted to the top of the hoods. Finally, we can also supply an internal reading light based on our ZFL 23 XL light source; also available as an ATEX certified model. This completes the introduction to the range of acoustic hoods available from Ziztel. Enabling intelligible speech for industrial facilities. Please contact us below for more information. www.ziztel.com

ZIZTEL - TUNNEL EMERGENCY VOICE AND ALARM BROADCAST SYSTEM

This video from ZIZTEL is an introduction to our life-safety voice and alarm system for road tunnels. ZIZTEL design and manufacture communications systems for life-safety critical applications; primarily for defence, oil and gas and nuclear industries. The ZIZTEL PAGA tunnel system is designed to facilitate the efficient evacuation of road tunnels in the event of an emergency. ZIZTEL have an extensive successful track record delivering life-safety critical voice and alarm broadcast packages to high-profile heavy industrial sites world-wide. Our hardware has been specifically designed to align with mission critical safety level certifications. The high-integrity tunnel PAGA system enables intelligible speech broadcast of both live and pre-recorded audio with capability to target specific zones of address within the tunnel. The PAGA system provides mission critical capability with automatic supervision and duplicate redundancy of critical paths on the network, along with at least two control access positions. By doing so, the system eliminates common mode failure. The system comprises of three basic components: The ZIZTEL head-end server cabinets at North and South locations of the tunnel are equipped with our PCAP-12-MX-2 touch screen operator access panels. Secondly, we have the PAWS-01-2-1000 slave amplifier outstation cabinets. And finally, the tunnel loudspeaker horns and end-of-line devices. The intuitive graphical user interface on the PCAP unit enables an operator to selectively target broadcasts to specific zones or groups within the tunnel. N+1 architecture provides duplicate fail-safe redundancy, ensuring continuity of system service. The output of the PAWS outstation enables connection to a 100 volt line radial loudspeaker circuit. The head-end server is protected inside an IP66 lockable steel cabinet. The PCAP-12-MX-2 operator panels provide a touchscreen interface and dual access microphones. The cabinet is also equipped with secure power-supply conversion, a fibre interface to tunnel endpoints and a gateway interface to other site systems. The touchscreen interface on the PCAP unit provides access to a menu of stored messages uploaded as wav files to the PAGA system. Interface to the VTS is by dry contact per message zone. The message interface is available in 24 channel increments. Multi-lingual messages can be up to 24 hours in length.
All messages are retained across all PAWS amplifier outstations – ensuring secure, distributed redundancy of file storage. The PAWS-01-2-1000 cabinet amplifier contains three, 500-watt Class-G industrial amplifiers: with two online and one on hot-standby. Integrated-supervisory monitors for line faults, amplifier health check, earth faults and power supply failure. Finally, the tunnel loudspeaker construction is corrosion proof and halogen free with an IP67 rating. It has a highly directional, flat profile with a controlled frequency response of 450 to 6.5Khz. This concludes our introduction to the ZIZTEL life-safety tunnel system.

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www.ziztel.com

Ziztel successfully packaged high performance Class G PAWS with the high performing TUNNEL-40-54(T) for the Norwegian Ellingsoy & Valderoy tunnels. With our specialised acoustic study, Ziztel were able to deliver the reliable and robust acoustic performance, eradicating known challenges faced with these type of installations. Another Successful Ziztel & DNH collaboration for our clients & partners.

ZIZTEL - ZADS (ADDRESSABLE SPEAKER SYSTEM)
IP66 weatherproof + ATEX/IECEx Hazardous Area.

This video from Ziztel is an introduction to our ZADS Addressable Loudspeaker System. Ziztel design and manufacture communications systems for life safety critical applications, primarily for defence, oil & gas, and nuclear industries. The ZADS system enables remote individual loudspeaker supervision and associated volume level setting from a central management position. The ZADS system comprises of two basic components; the ZADSC-02 Head end (located in the host central PAGA rack) and the ZADS-ZLSM-2 Outstations; located at each target loudspeaker position. The ZADS-ZLSM-02 is available in a number of executions including: weather-proof IP66, ATEX/IECEx certified for potentially explosive atmospheres and units that are embedded inside the loudspeaker enclosure. Conventional PAGA monitoring only checks the field-cable critical path, whereas ZADS supervision monitors the entire network including loudspeaker devices. The field-cable architecture follows a ‘free topology’, enabling self-healing loop, star, tree & branch networks. ZADS is non-invasive and operates over the established standard loudspeaker lines. No additional field cable conductors or local power supplies are required. The ZADSC-02 host controller fits between the rack power amplifier and field loudspeaker networks. The package works with either PAWS or 350A Class G amplifier technology. Each ZADSC-02 controller can manage up to 8x loudspeaker lines - corresponding to 8 potential PAGA amplifiers. Each line can support up to 50x ZLSM devices giving a total load of 400 loudspeaker outstations per ZADSC-02 controller. The ZADS-ZLSM-02 outstation is connected between the 100-volt line network and the respective loudspeaker. Each ZADS-ZLSM-02 is given a unique address 01-50 which is assigned during installation. A ZADS supervisory speaker check can be carried out automatically at a pre-set time each day or manually from a graphical user interface terminal. The test duration for each loudspeaker fitted is approximately one second. Each loudspeaker line and each loudspeaker connected to that line is sequentially addressed in time division multiplex. Data communications is by secure signalling tones. The ZADS supervisory test commences with a low-level tone burst # which is broadcast by all loudspeakers for approximately 200ms. During this time the ZLSM is primed and monitors the associated loudspeaker. Following the test signal the ZADSC-02 addresses each ZLSM in turn to recover the loudspeaker status. Upon completion of the ZADS line scan, the system returns to quiescent. In event of a ZLSM failure to handshake, a fault report is logged and the host PAGA is signalled, the graphical user interface delivers a clear indication of the system status. In the event that the PAGA is engaged by a higher priority voice or alarm input, the ZADS test is suspended for the duration of the broadcast. Upon completion of the broadcast, the test will continue where it left off. The ZADSC-02 can configure the volume-tapping selection for each loudspeaker from the graphical interface. Four taps are available: A, B, C, D. Where tapping 'A' is the highest volume and 'D' is the lowest. This completes the introduction to our ZADS Addressable speaker system. Intelligent speaker monitoring for an industrial facility.

Please contact us below for more information.
www.ziztel.com