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About the Bosch Praesideo digital
network architecture
Unlike traditional PA systems, the Praesideo uses a
network configuration - rather than having all system elements
connected to central controller. The 'daisy chain' network
topology means system elements can be connected or added at
a later date to virtually any point.
The optical system cabling carries all signals, so no extra
wiring is ever necessary. Smaller systems can easily be expanded
to match changing requirements, for instance creating new
zones. The flexible system architecture allows any type of
equipment to be located wherever is most suitable in the building
(for example power amplifiers can be located closer to the
loudspeakers).
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more information about Bosch Praesideo voice evacuation systems
please do not hesitate to contact
us directly. Or if you know which part you are looking
for, please complete our quotation
request form and our Bosch team will respond to your
enquiry immediately. |
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Redundant loop
What's more, by connecting the network ends together, a redundant
loop is created so any break in the cable doesn't affect operation
- an important consideration in an emergency system. Automatic
switching to spare power amplifiers in the system is possible
if equipment operation is disrupted.
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Network
monitoring
The network controller monitors the status of all equipment
in the system and reports any status changes. This monitoring
extends from the capsule of a Call Station microphone to the
end of a loudspeaker line. The external cables connected to
the control inputs are monitored for short and open circuit. |
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Fibre
optic
Using fibre optic networking ensures high reliability
and freedom from interference. The single network cable
transmits all audio and control data.
Digital network with a 'redundant loop' and 'end
of line loudspeaker supervision'
All
of the Praesideo system units or nodes have plastic fibre
optic interfaces. Plastic fibre is used to interconnect
nodes which are less than 50m apart. For distances of
more than 50m, glass fibre optic cable is used. A fibre
interface unit is used to convert from plastic to glass
or vice versa. |
Click for a larger diagram
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Click to view more
information about each network component:
- Glass fibre optic cable - 62.5/125u
- Fibre interface module - LBB 4401/00
- Fibre breakout boxes
- Fibre patch cords
- Fibre termination kits
- Glass fibre optic cable - 62.5/125u - Multi mode,
tight buffered cable
- Glass fibre optic cable - 62.5/125u - Multi mode,
loose tube, armoured
- Pre-terminated fibre optic cable
- Fire survival cable to IEC 60331-25
- Fibre termination service |
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| Glass fibre optic
cable - 62.5/125u |
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| Part numbers |
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LBB 4416/00 - Network cable 100m (no connectors)
LBB 4416/01 - Network cable assembly 0.5m
LBB 4416/02 - Network cable assembly 2m
LBB 4416/05 - Network cable assembly 5m
LBB 4416/10 - Network cable assembly 10m
LBB 4416/20 - Network cable assembly 20m
LBB 4416/50 - Network cable assembly 50m
LBB 4417/00 - 20 Praesideo network connectors for cable
LBB 4416/00
LBB 4418/00 - Praesideo plastic fibre tool kit
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| Fibre interface
module - LBB 4401/00 |
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For distances of more than 50m a Fibre Interface
Module LBB 4414/00 is used to convert from plastic
fibre cable to glass. The fibre interface is powered
by 48Volts from the Network Controller LBB 4401/00
or automatically powered from a local power supply
if connected. The local power supply being 48Volts
DC and up to 250Watts.
The module has 2 interfaces:
1 x system network connection for Praesideo plastic
fibre
1 x system network connection for glass optical
connection. This interface is connected to the
glass fibre cable via a glass patch cable and
fibre breakout box.
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| Fibre breakout boxes |
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Fibre Breakout Boxes are used to terminate glass fibre
optic cables. They can be supplied in Duplex with SC
fibre connectors. The unit, constructed of 1mm steel
is supplied loaded with 4 x SC Duplex connectors and
are designed for wall or floor mounting and feature
a screw down lid to prevent unauthorised access. The
enclosure can easily be fixed to the rear of equipment
racks. Dimensions 223mm (w) x 293mm (h) x 42mm (d).
Fibre breakout box
A strain relief point is provided for the secure management
of incoming fibre cables as well as the provision of
a cable router to facilitate efficient and tidy fibre
management. One side of the SC connector is used to
connect to the installed fibre cable and the other side
is used to connect a glass fibre patch cable to the
Fibre Interface Module.
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| Fibre patch cords |
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Pressac Zeta SC Duplex fibre patch cords. Supplied
standard (FIPC9) as 1m but available in other lengths
(2m, 3m and 5m).
-Zirconia ceramic ferrules
-2.5mm outside diameter
-62.5u fibre with orange LSOH sheath
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| Fibre termination
kits |
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Pressac Zeta fibre cold cure termination kit (FIZK1)
comprises everything required to terminate and polish
both 50 and 62.5 micron fibres with SC or ST connectors.
Using a cold cure epoxy and simple hand held polishing
equipment, the kit contains the following items of equipment
which enable quick and reliable termination of fibre.
The ST and SC connectors (not supplied with termination
kit) required for termination are supplied in kits of
50 or 250 with appropriate quantities of material for
termination. Included are strain relief boots for tight
buffered 900u and jacketed 2.5mm cable.
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| Glass fibre optic
cable - 62.5/125u - Multi mode, tight buffered cable |
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4-core multi-mode, tight buffered cable. The outer
sheath is both flame retardant and low smoke zero halogen
(for fire survival cable, see below). The design and
construction of this cable has resulted in a light,
easy to install and cost effective cable. 62.5/125 FDDI
grade fibre, suitable for internal and external use.
Cut to length service.
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| Glass
fibre optic cable - 62.5/125u - Multi mode, loose tube,
armoured |
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4-core loose tube armoured optical fibre cable for
duct and direct burial installations.
The corrugated steel tape provides both high tensile
strength and rodent protection. Low smoke zero halogen.
Cut to length service.
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| Pre-terminated fibre
optic cable |
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This pre-terminated fibre system significantly reduces
both the time and the expertise required on site when
installing fibre cabling.
Available in a choice of cable and connector styles,
every cable length of pre-terminated fibre is supplied
with a protective insulation sock and a power light
source loss measurement. Pre-terminated 50/125 cables
are available on request.
Pre-terminated cables are a special order, please check
lead times with NTE
sales.
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| Fire survival
cable to IEC 60331-25 |
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A 4-core loose tube multi-mode optical fibre fire
survival cable in accordance with IEC 60331-25. The
cable is constructed with a stainless steel tube with
low smoke zero halogen sheath (LSOH) and includes a
fire resistant jelly and fire swelling tape. The cable
is supplied on 1000m drums.
The cable is also available with up to 24 optical fibres.
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| Fibre
termination service |
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Fibre termination on-site is available
using NTE trained engineers. For more information please
contact
us. |
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For
more information about Bosch Praesideo voice evacuation systems
please do not hesitate to contact
us directly. Or
if you know which part you are looking for, please complete
our quotation request
form and our Bosch team will respond to your enquiry immediately.
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