Urmet 1074 Manuel D'instructions page 7

The Bibus 2nd edition VOP (Video Over Power)
system is created as an extension of the door phone
system with the addition of devices and wires. The
addition of only two non polarised wires in the
column is required to carry power and video signals
to the monitors. Refer to the door phone system
booklet for all information not provided herein.
PERFORMANCE
The performance of the Bibus 2nd edition VOP
system is essentially that of the Bibus 2nd edition
door phone system with the addition of the following
features.
• The number of devices which can be connected
and the maximum distances are those of the
Bibus 2nd edition door phone system without
restrictions due to video; this means that a
distance of 600 m is possible between main
camera and monitor with a maximum distance of
200m from the column. Specifi cally, an extended
differential (DE) video system is used in the
section between main and secondary devices;
this system consists of camera video signal
converters (Ref. 1742/13A), video distributors
(Ref. 1795/40) and video signal regenerators
(Ref. 1795/250).
• In-out systems or systems with fl oor video
distribution can be made with only four wires in
the column; these are two pairs of non polarised
wires, namely: 1 pair for video and 1 pair for
audio.
• Urmet provides a dedicated wire for the column
which ensures operation of the system and video
picture quality. A simple AWG22 telephone pair
wire is suffi cient to connect the cameras for
carrying the video signal only.
• Urmet video door phones of various models can
be used; up to two parallel video door phone
can be obtained (without the use of local power
units); always only one monitor may be operated
at a time.
• A Scaitel video module can be combined with
the concierge switchboard.
• Do not use 82Ω 1/4W terminal resistors on
monitors and distributors.
• The monitor will light up when the call is received
and will remain on during all the conversation
(max. 250s).
DS1074-001D
SYSTEM TYPOLOGIES
As mentioned, the Bibus 2nd edition VOP system is
the evolution of the Bibus 2nd edition door phone
system with the addition of the video component.
The audio part is separated on street side and
column side by bus couplers; similarly the video part
is separated between camera and column monitor
side by the VOP video power unit. This device, in
addition to powering the column monitors, conveys
the video signal from the main side or the secondary
side on the same power lines.
Some typical system confi gurations are shown
below.
1. Single column
connection.
WIRE
Ref. 1074/90
ENGLISH
system with
6 + PAIR WIRE
(AWG 22)
TC
2
in-out
7