Installation Manual

LTC 8903 Series bay provides 64 outputs, two LTC 8921/00 VIM cards are required for each
32 inputs (when more than 32 monitors are being served by the LTC 8903 Series bay). In this
case, inputs are shared by adjacent cards. The cards in slots one and two handle inputs 1-32;
the cards in slots three and four handle inputs 33-64, etc. Since each input goes to two cards,
only one of the two cards should be terminated. Although either card in a pair can be
terminated, it is recommended that cards in the odd number slots are terminated (dip
switches ON) and cards in even number slots are unterminated.
The LTC 8903 Series Input Bay provides video looping connections which use LTC 8809/00
coax type ribbon cables. Each LTC 8809/00 cable provides looping capability for up to 16
video inputs. The termination switches on the LTC 8921/00 cards should be set to OFF for all
LTC 8903 Series Input bays except those in the last set (assuming the system will NOT have
video looping connections). In the last bay, the termination switches should be set to ON in
even numbered slots (as described in the preceding paragraph).
If the system will have some or all video inputs looped out, all termination switches
corresponding to the looped video channels should be set to OFF in all LTC 8903 Series bays.
Second Level 8903 Series Terminations
When more than 1024 cameras are used, two levels of LTC 8903 Series bays are required. In
this case, the LTC 8903 Series bays in the first level are terminated as described above. In the
second level LTC 8903 Series bay, the terminations switches should be turned ON on all
cards.
NOTE: In the secondary level, LTC 8903 Series cards are inserted only into slots 1, 4, 5, 8, 9,
12, 13, and 16 as depicted in , page 68 through , page 68, , page 68 and , page 68.
LTC 8902 Series Terminations
Dip switches S1002, S1003, S1004, and S1005 on the LTC 8934/00 Video Output Module are
video termination switches, which should be set to ON (terminated), the factory default
position. This correctly terminates the outputs of the LTC 8903 Series bays into a 75 ohm
load.
Like camera inputs, monitor outputs on the Allegiant system are designed to be terminated.
Each monitor output from the LTC 8902 Series bay expects to be connected to a 75 ohm load.
This is the load typically provided by a normal monitor. If a monitor output line is looped
through several monitors or other equipment, ensure that only the last unit on the line is
terminated.
System Data Connections
LTC 8901 Series CPU Data Connections
The LTC 8901 Series CPU connects to the supplied LTC 8943/95 System Controller PC using
the supplied RS-232 cables and the Digital I/O connector. The PC COM3 port connects to the
PRIMARY CONTROLLER jack on the LTC 8901 Series bay. The PC COM4 connects to the
BACKUP CONTROLLER jack on the LTC 8901 Series bay.
The supplied Digital I/O cable connects the PC Digital I/O board (50-pin header connector on
the back of the PC) to the SWITCH CONTROL jack on the LTC 8901 Series bay.
The LTC 8901 Series CPU also makes two LAN connections to the LAN switches. The PRIMARY
LAN connector should be connected to PORT 1 of the LTC 8944/93 LAN switch (labeled
Primary IP address) using a supplied standard 3 m (10 ft) 10/100Base-T twisted pair cable.
The BACKUP LAN connector should be connected to PORT 1 of the LTC 8944/93 LAN switch
(labeled Backup IP address) also using a supplied standard 3 m (10 ft) 10/100Base- T twisted
pair cable.
6.13.2
6.13.3
6.14
6.14.1
LTC 8900 Series
Hardware Installation Procedure for Redundant System Configuration Utilizing LTC 8901
Series CPU | en
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Bosch Security Systems, Inc. Installation Manual 2016.04 | 10.7 | F.01U.323.096