VAS Centrals

Systems of safety level III according to VDE 0833‑4 must be able to sound in all alarm areas in the event of a single fault in such a way that the speech intelligibility according to the STI method does not fall below 0.45. Our solution does not require a dublicated second system to fullfill this requirement. Due to a so-called n+1 redundancy function, one (1) additional central unit is sufficient.

Thanks to the low height (1 HU, 19") and the integration of all functions of a premium voice alarm system, the space requirement is up to 66 % less than that of competitor systems with comparable functionality. Due to the low power consumption and the horizontal airflow, additional central units can also be mounted directly above each other in the cabinet.

The leveling task for PAGA systems (i.e. the correct gain setting from the microphone to the speaker) can be very time-consuming with many sources and speaker lines. Instead of m_Sources˙n_Lines leveling operations, only m_Sources+n_Lines operations are necessary because all levels are set against an internal reference. Only one (instead of two) service technician is required.

CESAA voice alarm systems consist of only a few different components, mistakes during installation are thus avoided. Even complex systems can only be implemented with central units installed one above the other. RJ45 and other standard plug connections simplify the cabling. The WEB interface always combines all devices into one view. An individual configuration is not necessary. The auto-discovery function automatically detects all devices on the network. Mistakes in the assignment of IP addresses are impossible. Settings of DIP or address switches are not necessary.

Simple systems can be implemented with a single central unit. Planning flexibility is provided by up to 4 parallel channels even in the minimum expansion stage. Each additional central unit scales not only the number of channels, but also the number of available additional connections (e.g. analog inputs). Mistakes in the planning phase can often be corrected by purchasing a license without additional assembly or installation work.

Wenzel Elektronik offers a portfolio of media converters and range extenders for different use cases. The guaranteed range of the LAN interface of 100 m can thus be extended to up to 15 km. Even greater distances can be achieved with single mode fiber optic media converters. Media converters convert from copper to fibre optics and allow the operation of network components without interference even if the connecting line has to be laid through an electromagnetically problematic section, e.g. along a high-voltage cable route on an industrial site. Some range extenders pass on their own PoE (Power over Ethernet) supply, e.g. from a PoE switch, to our PoE-enabled call stations via the long distance connection and the remotely powered counterpart. This eases the wiring considerably by simply connecting the components together.

Loudspeaker lines are - imperceptible to humans - cyclically checked for interruption, short circuit, ground fault and deviations in the loudspeaker power rating. The verification of live announcements is done by a output power measurement. Cyclical end-to-end tests check the minimum necessary quality of network connections between call stations and the PAGA control center.v

Errors and various status information are sent via SNMP traps or are available via standard SNMP MIB queries.

Each of the 4 integrated amplifiers can take over the task of a failed amplifier.

You only pay for features you need. This means that many functions are already on board and can be activated on request without additional assembly or installation work. Configuration changes can be made remotely either via the optional LTE module or by connecting the system directly to the Internet.

1. Disconnect the faulty device or device to be replaced from the power supply and pull also all other plug connections from. / 2. Loosen 4 screws for cabinet mounting on the front panel. / 3. Replace the device. / 4. Retighten 4 screws for cabinet mounting on the front panel. / 5. Plug in all connectors again, finally also the power supply. / 6. Enter the UUID printed on the exchange device via the WEB configuration interface, or in the case of a master, insert the master module from the removed device into the exchange device. / 7. Activate the change via the WEB configuration interface → Ready. All settings of the exchanged device are taken over. No new leveling of the system is necessary.

An optional VPN LTE router allows remote dial-in to the system by maintenance personnel. Your advantages: 1. Short response times. / 2. Relief of the staff. / 3. Cost and time savings. / 4. High availability of the system. / 5. No infrastructure required at the customer's site. / 6. Independent, secure access. / 7. Competent support by Wenzel experts. /

Central units only have a power consumption of 25 W in standby mode. Operating costs are also saved in cooling, since the waste heat must also be dissipated again. The lower power consumption allows the use of small batteries to keep voice alarms powered for at least 30 minutes even if the main power supply fails.

The volume of the announcements can be adjusted to the time of day using the predefined volume control. In addition, it is possible to lower or raise the volume before the announcement via the dynamic, environment-noise-dependent adjustment.