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MA-2000
8
COMMUNICATION LINES WITH DETECTORS / MODULES
The MA-2000 control unit communicates with intelligent detection and control devices which are addressable
through a 2-wire line.
The line can be connected to respect the specifications relevant to the signalling circuit lines of the STYLE 4
(open line) and STYLE 6 (closed line).
The peripheral devices are powered by using the same line which is used to communicate with them.
EN54
!
In case of short
circuit cannot be
lost more than 32
alarm points
The connection cables fitted with detectors, the auxiliary devices and the power mains, can be introduced into
the control unit by making some appropriate holes, by running cables along the side walls of the box, and
appropriately providing for those which are located near the terminal block.
Technical specifications of detection line connection cables
Type of cable: 2 conductors (for their section refer to the table below)
•
Twisted narrow pitch (5 /10 cm.)
•
Shielded pair cable
Max. admitted capacity: 0,5 μF
•
Cable section
The sections are referred to the total length of the line (in case of "STYLE 6" loop and therefore when the loop is
closed, it is considered the loop length) which, however, must not be longer than 3000 m and the total resistance
of the line must be lower than 40 Ohm.
Minimum Cable Section
Up to 500 m
cable 2 x 0,5 mm²
Up to 1.000 m
cable 2 x 1 mm²
Up to 1.500 m
cable 2 x 1,5 mm²
Up to 3.000 m
cable 2 x 2,5 mm²
Number of installed devices for line
The maximum number of devices that can be installed for each of the four detection lines is the following:
•
99 Detectors using Clip Protocol
•
99 input and/or output modules using Clip Protocol
Isolator modules
The isolators modules allow to electrically insulate on the loop a series of devices from the remaining ones,
allowing loop critical components to continue operating even in case of the communication line short circuit.
Input Modules
The addressable inputs modules allow the MA-2000 system to monitor contacts, manual alarm call points,
4 wires conventional detectors, and several other devices with alarm contact outputs.
Output modules
Through addressable output modules, the MA-2000 system, by means of the programmable CBE equations,
can activate the indication circuits or output relays through voltage free contacts or supervised class A controls.
Intelligent detectors
The MA-2000 control unit can communicate only with analogue detectors declared as compatible by Honeywell.
30
•
If more than 32 devices (ref. EN 54-2) are installed on a line, this must be
configured as closed Loop (style 6).
•
If a connection is performed with a T-branch in a closed loop, not more than 32
devices must be installed on this branch and these devices must be separated by
line isolators.
•
If the line is in Style 6 (Loop) an appropriate number of isolators devices must be
provided, in such way to don't lost more than 32 points in case of short circuit.
The detection circuit must be separated by other cables to minimize the risk of
interferences.
Use twisted cable according to the specifications.
The detection Loop circuit is supervised and current-limited.
M-167.1-MA2000-EN / 06.2022
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