General Description
System Description and Operation, AutroSafe Maritime Gas Detection, 116-P-BS420MG/XGB, Rev. E, 2019-12-10,
Autronica Fire and Security
Page 5
4. General Description
4.1 AutroSafe Maritime Gas Detection
Refer to illustration in Chapter 4.2.1; a typical topology for the
AutroSafe Maritime Gas system.
Up to a maximum of 15 addressable Gas detectors can be connected
to each PowerLoop, depending on power load and cable
length/specifications. Each AutroSafe Maritime Gas Control Panel can
support one AutroFieldBus ring, which is capable of handling up to 31
PowerLoop drivers.
Detectors with a 4-20mA signal transferral can be connected to the
PowerLoop by means of the BN-342 interface unit.
4.2 Distributed System Topology
The system is distributed, meaning that panels can be situated in local
equipment- or instrument rooms close to the detectors. The system is
linked together by use of the AutroNet network.
4.2.1 System Architecture
AutroSafe 4 operates on a high-speed and fully redundant Ethernet-
based network solution; AutroNet, providing extremely fast data
transmission. A maximum of 64 system units (panels, controllers) can
connect to the AutroNet. The main circuit board in each single
panel/cabinet provides two Ethernet ports, enabling redundancy.
The Maritime Gas Control Panels will be connected through a
dedicated TCP/IP network. Exact topology to be finalized during
detailed design. The network has the ability to share a common Cause
and Effect (C&E), making us able to carry out logic operations across
different areas. The Maritime Gas Panels are also able to share logic
functions across networks by means of plant wide actions performed
by a centralized operator station.
All detection and activation, Cause and Effect, can be done locally for
each area, i.e. each area can be an independent self-contained
system.
The figure below shows how AutroMaster operator stations are used
to monitor the entire network.
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