Art.2380; Interface "2 Wire " To "4+1" Audio System - Videx VX2300 User Manual

Art.2380

Fig.1
DESCRIPTION
Interface to connect 4+ 1 audio devices to the VX2300 "2 Wire" Bus (For example the Art.380 telephone interface or the Art.275/2W PABX interface)
Using the items listed above (380, 275/2W) it is possible to use a conventional household telephone as a standard intercom.
The operating mode of the telephone depends on the connected device and on the connections made, refer to the instructions of the Art.380 or Art275.
DIP-SWITCHES AND JUMPERS (FIG.1)
SW1 Switches from 1 to 7 are used for unit address (from 1 to 127 binary coded). Last switch (8) is not used
SW2 Switches 1,2 and 3 are used to set privacy duration time. Switch 4 is used to set the "Priv" signal operating mode
SW3 Switches 1,2 and 3 are used for intercommunication settings. Switch 4 is not used
S1 Impedance terminator. The jumper must be normally closed. When more videophones/intercoms are connected in parallel (from a pe-
ripheral to another and so on until the last) the jumper must be open for all the intercoms except for the last following the order of connec-
tion.
PROGRAMMING
After each programming operation carried out through dip-switches or jumpers it is necessary to temporary disconnect the device from the BUS or from
the power supply if locally powered.
SW1 – DEVICE ADDRESS
Switches Status
7 6 5
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
OFF ON OFF
ON ON OFF
The table above shows how to set the address of the device. Considering that ON = 1 and OFF = 0, multiply each digit for the relevant decimal weight
then sum the values obtained to get the address: E.g. as highlighted in the table OFF,ON,OFF,OFF,ON, OFF,ON in binary is equal to 0100101 then
multiplying each digit for the relevant decimal weight you obtain the address that is 37.
Note
The maximum number of units allowed is 100 but the address of each unit can be a value between 1 and 127.
SW2 – PRIVACY DURATION TIME
Switches Status
4 3 2
OFF OFF
OFF ON
ON OFF
ON ON
The "Priv" terminal works as an open collector output to signal the status of the privacy service. When the service is enabled the "Priv"
OFF
output shorts to ground.
This mode must be set when the Art.2380 is connected in parallel (with the same address) to one or more inter-
ON
coms/videophones. Make a link between terminals "Priv" and "2".
PrtCode:VX2300_2_9.doc – Pag.36
Interface "2 Wire" to "4+1" audio system
4 3 2
OFF OFF OFF
OFF OFF ON
OFF OFF ON
OFF ON OFF
OFF ON OFF
OFF OFF ON
1
The privacy duration time is set by switches 2 and 3. After the privacy service is ena-
bled, it is disable when the set time expires or the relevant button is pressed again.
OFF
No privacy time expiration: the privacy service is enabled or disabled only by the rel-
ON
evant button.
VX2300 2 Wire Video Digital System
Binary Code – Decimal Value
1 64 32
ON 0 0
OFF 0 0
ON 0 0
OFF 0 0
ON 0 1
ON 1 1
Privacy Mode
(switch 1)
08/03/2011
16 8 4
0 0 0
0 0 0
0 0 0
0 0 1
0 0 1
0 0 0
Fig.2
Decimal
Code
2 1
0 1 1
1 0 2
1 1 3
0 0 4
0 1 37
1 1 99
Privacy Duration
(switches 2,3)
15 minutes
1 hour
4 hours
8 hours
Rev.2.9