Bosch Appliances LTC Main Site Trunk Line Video Inputs, Control Data Lines in Satellite Systems

9.2Main Site “Trunk Line” Video Inputs

At the main site, video trunk line connections coming from each of the remote site(s) should be connected (and properly terminated) using an available video input at the main bay. There are no programming restrictions concerning their connec- tions, but a sense of order can be maintained if a group of video inputs are used at the upper end of the system’s designed capacity. This technique allows the main sys- tem to be more easily expanded in the future with additional local cameras or trunk lines. As an example, assume there are a total of eight trunk lines coming from all satellite sites which are connected to a main site system designed for 32 inputs. Inputs 25 to 32 can be reserved for the trunk lines, leaving inputs 1 to 24 for local camera connections. If there will be no local camera inputs, the trunk lines can start at the first video input.

9.3Control Data Lines in Satellite Systems

Each satellite site must be provided with an Allegiant biphase control data line com- ing from the Signal Distribution located at the main site. This data line carries all pan/tilt/zoom control commands, in addition to the switching commands generated by the main site switcher. The control data line should be connected to a LTC 8780 Series Data Converter unit, which provides address decoding functions for the satel- lite site. An LTC 8780 Series is required for each satellite site, and must be given a unique site address number. If operators stationed at the satellite site are permitted to control pan/tilt/zoom-equipped cameras, an LTC 8569 Series Code Merger unit must be installed at the satellite site. In order for each site to have control over pan/ tilt/zoom-equipped cameras, the Code Merger combines code generated by the main and satellite sites. The LTC 8780 Series can then be connected to one of the data outputs of the LTC 8569 Series unit.

9.4Satellite Site Programming Requirements

The optional LTC 8059/00 MCS or the optional LTC 8850/00 GUI Software is required to properly program a satellite system.

Programming the satellite sites is usually limited to designating their logical camera numbers to appropriate values via the Camera ID Table of the MCS or GUI Soft- ware. Note that no duplicate logical camera numbers are permitted anywhere in the system. Allegiant logical camera designations can be renumbered to any four-digit number on all Allegiant Series systems, except the LTC 8500 Series, which is limited to three (3) digits. Few other restrictions exist. These camera numbers are the num- bers entered at both the satellite and the main site keyboards when camera selec- tions are made. On any AutoDome Series camera or conventional pan/tilt/zoom- equipped camera, this logical number must also be entered as the receiver/driver's site address number.

EN 22 Bosch Security Systems December 13, 2005