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7
COMMUNICATION LINES WITH DETECTORS / MODULES
The MA-1000 control unit communicates with intelligent detection and control devices which are addressable
through a 2-wire loop or 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 loop).
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 appropriate entrances on the panel cabinet, 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 selection refer to the table below)
•
Twisted narrow pitch (10 cm)
Max. admitted capacity: 0,5 µF
•
Shielded pair cable
•
If the recommended cable types are not common regionally, contact Honeywell support for
alternative cable types!
Cable section
The sections are referred to the total length of the line (in case of a closed loop, the total length is considered)
which, however, must not be longer than 2.500 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 2.500 m
cable 2 x 2,5 mm²
Number of installed devices for line
The maximum number of devices that can be installed:
•
99 Detectors
•
99 input and/or output modules
Isolator modules
The isolator modules allow electrical isolation of a series of devices from others to reduce the number lost in a
loop short circuit condition.
Input Modules
The addressable inputs modules allow the MA-1000 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-1000 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-1000 control unit can communicate only with analogue detectors declared as compatible by Honeywell.
M-167.1-MA1000-EN / 02.2023
•
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 spur in a closed loop, no more than 32 devices
must be installed on this branch and these devices must be separated by isolators.
•
If the line is in Style 6 (Loop) an appropriate number of isolators devices must be
provided, in such as to not lose more than 32 points in case of a short circuit.
The detection circuit must be separated from other cables to minimize the risk of
interferences.
The detection Loop circuit is supervised and current-limited.
MA-1000
25
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