Second Level Ltc 8903 Series Terminations; Ltc 8902 Series Terminators; System Data Connections; Ltc 8904 Series Cpu Data Connections - Bosch LTC 8900 Series Installation Manual

LTC 8900 Series
Each LTC 8921/00 VIM card provides outputs for 32 monitors. The LTC 8903 Series bay
provides 64 outputs, two LTC 8921/00 VIM cards 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
numbered 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 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.
5.12.2

Second Level LTC 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 termination switches should be turned ON on all cards.
Note that 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 66 through , page 66, , page 66, and , page 66.
5.12.3

LTC 8902 Series Terminators

Dip switches S1002, S1003, S1004, and S1005 on the LTC 8934/00 Video Output Module are
video termination switches. All of these switches should be set to ON (terminated). This
factory default correctly terminates the outputs of the LTC 8903 Series bays into a 75 ohm
load.
Just 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, make sure that only the last unit on the
line is terminated.
5.13

System Data Connections

5.13.1

LTC 8904 Series CPU Data Connections

The LTC 8904 Series CPU connects to the LTC 8946/93 LAN switch using a supplied standard
8m (25ft) 10/100Base-T twisted pair cable. The LAN cable can be connected to any port of the
LTC 8946/93 LAN switch.
5.13.2

LTC 8902 Series and LTC 8903 Series Data Connections

Data connections for LTC 8902 Series and LTC 8903 Series bays are shown in , page 66.
Each LTC 8902 Series bay and LTC 8903 Series bay has two LAN connectors, but either of
these connectors can be used. Only one at a time should be connected. The supplied standard
8 m (25 ft) 10/100Base-T twisted pair cable is used to connect the LAN connectors on the LTC
8902 Series and LTC 8903 Series bays to any of the ports on any of the LTC 8946/93 LAN
switch(es).
Bosch Security Systems, Inc.
Hardware Installation Procedure for Standard Systems Utilizing LTC 8904 Series CPU |
Installation Manual
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2015.01 | 10.6 |