ReteMatic™ Head Unit
IP-RMH1
Installation and Configuration manual
7
INSTALLATION
R
ETE
M
ATIC
N
ETWORK
A
RCHITECTURE
A ReteMatic Network consists of two or more ReteMatic devices that communicate one another by means
of an electrical bus, which provides both the power and the data connection.
The simplest form of ReteMatic network is a
ReteMatic Branch
, composed by:
•
a
ReteMatic
Head
Unit
, which generates the ReteMatic bus, and
•
one or more
ReteMatic Field Units
(up to ten), which connect to the electrical bus generated by the
Head Unit by means of standard electrical cables, with a free bus topology, and provide a standard
Ethernet connection to Ethernet devices that
Since the Head Unit can be connected to a standard Ethernet LAN by means of the LAN port, two or more
ReteMatic branches can be interconnected by means of a simple Ethernet switch, therefore allowing to
scale the ReteMatic Infrastructure up to the required size and even to interconnect distant ReteMatic
branches by means of optical fibers or WAN connections.
In we can see an application example of ReteMatic Network (orange line), which is used to deploy a Fitre
Astro Page&Talk VoIP Intercom and PAGA system in a Ex classified Petrochemical site.
In this example, a ReteMatic Head Unit (
IP-RMH1
) is connected to the electrical power line provided by an
UPS (Uninterruptible Power Supply), and to the LAN of the plant. The Head Unit has a noise filtering
function which protects the ReteMatic bus from the electrical noise coming from the Power input, so
enhancing the bus coverage.
The ReteMatic Field Units deployed in this application are two Ex-certified models, the
RMF50-Ex
with an
external maximum load of 50W@24VDC and the
RMF150B-Ex
with an external maximum load
of150W@24VDC and the possibility to control a Visual Beacon directly connected to the Field Unit and
powered by the same AC voltage powering the ReteMatic bus. These Field units provide power and
Ethernet connection to the VoIP intercom stations and the amplified loudspeakers derived from them.
Please note that it is possible to power also some standard electrical devices by means of a ReteMatic bus,
but this cannot be achieved by connecting them directly to the bus, as this would introduce electrical noise
causing a significant deterioration of the communication performance. To safely power these ancillary
AC-powered devices without affecting the ReteMatic bus performance, the AUX power outlets found in
most ReteMatic Field Unit models must be used instead.
