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PAGE 30 of 60 VX2200 TECHNICAL MANUAL VER1.4

Audio Telephones (3171, 3172 & 3176)

Description

The Art.3171 is a digital intercom based on the “2 Wire BUS”, it includes a door-open button and a service

button plus an electronic call tone with a 3 level volume control which can be adjusted by the user. Internally,

the intercom, has an 8 way dip-switch to set the PHONE ID, a terminal board with 6 terminals for connection

to the bus and other connections and a trimmer (VR1) to adjust the microphone volume. With the 3000

series it is possible to connect up to 180 intercoms on the same system. If required it is possible to give the

same address for a max. of 3 intercoms (for applications that require more units in the same apartment). The

door-open push button on the Art.3171 is also the “call to concierge” (if present), while the “n” push button

shorts terminals “SW SW” (Max 30Vac/dc 200mA) when pressed.

The Art.3172 is the same as the Art.3171 with the addition of a privacy switch which activates the “privacy

mode” (the user can’t receive incoming calls).

The Art.3176 is similar to the Art.3172 but the “privacy mode” is activated by pressing the

push button. It

is signalled by the red led “privacy on” and its duration (except when the same push button is pressed again)

depends on the 3 way dip-switch (housed inside the intercom). The Art.3176 doesn’t have the service push

button but it has a green “door open” led to give the user a visual indication of whether the door is open or

closed: to use this service, an additional wire is required from a door contact to the intercom.

All 3 models of intercoms allow the connection of an optional relay board Art.402, for the activation of an

external sounder instead of the internal one: the board is housed inside the intercom, connected to the JP2

(red wire on “+” side) and the JP1 jumper (normally on A position) must be moved to the “B” position.

Art.3171 & 3172

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Videx VX2200 Guía para resolver problemas Pagina 30