Code 97586I-1 V06_10Page 6
MDS - BMDS - B
MDS - BMDS - B
MDS - BUS2US2
US2US2
US2
MDS - BMDS - B
MDS - BMDS - B
MDS - BUS2US2
US2US2
US2
Overview
This device has been designed to combine MDS and BUS2 Interior Blocks.
Conversations within each block are independent, they can be held simultaneously with the entry panel or the general
entrance (either of these), this is because the BUS2 Decoder also acts as an audio changer, which when in standby
mode isolates audio within the block from the general entrance allowing the interior panels (BUS2) hold independent
conversations between their various residences. In this way it is possible to maintain simultaneous conversations in
different blocks, each one with their own interior panel. When a call is made from the general entrance to one of the
block’s residences the decoder connects the audio to the general entrance. If the call from the general entrance is
directed to another block the decoder disconnects the changer in such a way that the block’s audio is isolated once
again.
The BUS2 decoder should be installed preferably where the interior block power source is installed, together with the
video switcher where applicable. It is very important to use a power source for every interior block to avoid interference
between the signals generated from one block (calls, call confirmation tones, calls to guard unit etc).
A BUS2 decoder can manage between 1 and 199 residences (maximum allowed by BUS2) depending on how it is
configured.
There can be various construction types, even within the same building.
- Type A: Individual Chalets. This is the simplest case. A BUS2 decoder is used which responds to a unique chalet
address. The decoder output is set up in parallel with the chalet’s BUS2 kit panel and the residential terminal.
- Types B, C or D. Residential Buildings There are various options depending on each building’s capacity. The logical
thing is to choose certain digits to identify the block and others for the residences within the block.
Each residence has an assigned 4 digit call code for calls from the general entrance. These digits can be assigned in
the following manner:
Call Digits No of Blocks No of residences/per block Total residences
Type A (*) VVVV 9999 (0001..9999) 9999
Type B (*) BVVV 10 (0 .. 9) 199 (001..199) 1990
Type C: BBVV 100 (00 .. 99) 99 (01 .. 99) 9900
Type D (*) BBBV 1000 (000..999) 9 (1 .. 9) 9000
B: Block Digits.
V: Residence Digits
Type A -> Individual Residences. Maximum per development: 999 chalets/residences.
Type B -> Large Blocks (more than 100 residences). Maximum per development: 10 blocks with 199
residences per block, (allows you take advantage of the BUS2 system’s maximum capacity, 199
residences in each block).
Type C -> Medium Sized Blocks. Maximum per development: 100 blocks with 99 residences per block.
The most common type.
Type D - > Small Blocks. Maximum per development: 1000 blocks with 9 residences per block.
(*) Note: these options can only be used if MDS Digital Interior Blocks are used in the system (1
Decoder per central unit). See advanced diagrams.
MDS-BUS2 DECODER Ref. 3245
