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Overview

Variodyn is the brand name of a paging system. the name itself an artificial word constructed from the word variable and dynamic - representing the properties of a new generation of paging systems - was introduced about 1975 at germany for the analog paging system developed by siemens. The brand name was given to av digital at the year 2000. Since 2008 the brand is now owned by honeywell.

history of the variodyn system

Variodyn: the first system was an fully analog system, consisting of several components pre amplifiers, mixers and power amplifiers. the paging behavior of an installation was made by wiring contacts and relays. line relays were installed to get better control where the signal is distributed and get a better cost effort due power amplifiers are expensive. with the line relays it was possible to drive more lines, not using all the lines at the same time. we have no more information about the components.; status: not in production

Variodyn 2000, developed 1985 by siemens: this was also an analog system. the new innovation was to design all the components mechanical and electrical compatible, so that the components could be combined in thousands of variations by wiring at the rack. the components also had the necessary paging switches on board and used electronic switches instead of relays to switch audio. there was also a small audio matrix (4x4) supported by each component, and the audio switches were easy controllable by external contacts. the main behavior of the system had to be implemented by relays which were supported by some components implementing often used behavior.; status: not in production

Variodyn 2030, developed 1987 by siemens: this is an extension for the variodyn 2000 devices. all the devices were designed to plug on a interface for digital control. with this interface the audio switches of the devices were controllable by a microprocessor. new components were developed to get user interaction from keys and switches and show the system's operating states via lights to the user. the software was then controlling the behavior of the audio switches and allowed then more complex behavior to implement than it was possible using only relays.; status: not in production

Variodyn 3000, developed 1991 by siemens: this is an analog system digitally controlled. the innovation was to replace the expensive parallel control bus used by the Variodyn 2000 system by a serial bus. this reduced also rack wiring complexity and allowed to build up larger systems. all the components use relays to switch audio and allows to control digitally the audio volume at each device. a more powerful processor controlling the behavior was also developed. then the software was enabled with a lot of features for paging systems. a configuration phase was introduced defining the behavior and devices installed at the system.; status: not in production

Variodyn D1, developed 2004 by av digital: this is a fully digital distributed system. only 10 different components allow to build small installations and grow up to very large installations. the benefits are detailed described at several websites. the system has overridden the features older one. several hundred installations are running worldwide. av digital was acquired 2008 by honeywell.; status: in production

Variodyn is a resistered trademark by av digital gmbh.

thanks to harry for helping

Features of the Variodyn Systems

table: comparision of functions
	Variodyn D1	Variodyn 3000	Variodyn 2030	Variodyn 2000
system complexity
modules	9	>50	>70	>50
technology	digital control digital audio	digital control analog audio	digital control analog audio	key and relay wired control analog audio
basic public address functions
monitoring	yes	yes	yes	yes
autonomous generated signals	yes	yes	yes	yes
autonomous audio storage	yes	yes	yes	no
sinal processing	yes	no	no	no
environmental noise compensation	yes	yes	no	no
multiple connections	yes	yes	yes, max 4	no
connection priority	yes	yes	no	no
connection conflict management	yes	yes	no	no
connect group of lines	yes	yes	no	no
remote administration	yes	yes	no	no
configuration	configuration tool, telnet	configuration tool, EIA232	no	no
alarm mode	yes	yes	no	no
power amplifier replacement	yes	yes	no	no
loudspeaker line survey	yes	yes	yes, hardware	no
power amplifier survey	yes	yes	yes, hardware	no
earthfault survey	yes	yes	yes, hardware	no
networking	yes, eth100	yes, EIA232	no	no
time scheduling of connections	yes	no	no	no
time synchronization	yes	yes	no	no

external links

av digital, manufacturer

german

belgium

netherlands

Greger Pauschitz design by gp

Audio/Variodyn