TX1500 Manual Combined 1Oct03 PSC Page 4 of 31 Matrix
DESCRIPTION
The Tx1500 is a video matrix and telemetry control system offering control of up to 96 cameras from 4
control positions. 8 monitor outputs are provided as standard. Monitor 1,2,3 & 4 are control monitors with on
screen display and monitors 5,6,7 & 8 are spot monitors.
Up-the-coax telemetry receivers can be controlled when viewed on monitors 1,2,3 & 4. RS485 linked
receivers and domes can be controlled when viewed on any monitor.
Control of the full range of BBV coaxial telemetry receivers and dome interfaces is provided as standard.
BBV’s new generation of RS485 controlled telemetry receivers, RX457 and RX557, can be driven by the built
in RS485 telemetry port. Protocol converters are available to allow RS485 control of selected domes.
The RS485 can be either daisy chained from receiver to receiver or to simplify wiring an 8 port RS485
StarCard can be used allowing a star-wiring configuration. When wired as a star, a fault on a single leg allows
the remaining receivers to operate.
TX1500 COMPONENTS
A Tx1500 system comprises of several different types of card enclosed in a subrack or mounted remotely.
The subrack can be fitted to a 19” rack via supplied ears that can be mounted on the front or rear face of the
subrack. By fitting the ears on the back of the subrack, it can also be wall mounted.
The Monitor output card communicates with the other cards via a 4 wire multi-drop RS422 protocol named B-
BUS. B-BUS devices can be linked using Cat5e patch cables when mounted local to the Tx1500 and via a
good quality twin twisted pair screened data cable when mounted remotely.
A complete Tx1500 system will comprise of at least the video matrix to allow switching of video onto 8
monitor outputs. BBV up-the-coax telemetry receivers can be controlled directly using a single coax
connection to each camera position. RS485 control of the BBV RX457 (AC) receiver and RX557 (DC)
receiver is also provided.
An 8 output RS485 starcard is available to simplify RS485 installations and an optional protocol converter
allows control of an expanding range of other manufacturers dome cameras.
Site alarms and contacts are handled with the alarm card that provides 16 inputs. Each input must be a volts
free, normally closed contact that opens on alarm activation. Up to 6 alarm cards can be linked into the
Tx1500 system either local or remote offering 96 alarm inputs. An alarm disable input is provided on each
alarm card. Providing a closed contact on the disable input will prevent the alarms on this card from being
processed.
Off site control, via video/data transmission equipment, and local control from PC and other equipment is
made possible by using the B-BUS interface. As far as the Tx1500 is concerned the interface is another
keyboard. The interface can be driven using either the Tx1000 or Tx1500 RS232 control protocols.
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