System Components
LTC 8904 Series CPU Bay
This unit provides central control for the entire system. It contains all the system's
configuration information such as camera tables, alarm tables, sequences, etc. It is also the
connection interface to the various external Allegiant Series accessory products such as
keyboards, alarm interfaces, signal distribution units, etc. One LTC 8904 Series CPU bay per
system is required. An LTC 8904 Series CPU bay includes one power supply (LTC 8905), one
CPU module (LTC 8910), and a relay module (LTC 8917).
LTC 8901 Series CPU Bay
(Applicable to redundant system configurations only)This unit is similar to the standard LTC
8904 Series CPU, except it utilizes a redundant design architecture. The LTC 8901 Series
provides hot standby features with redundant power supplies and CPU boards. In conjunction
with the supplied System Controller PC, the LTC 8901 Series system is capable of automatic
detection of a main power supply or CPU fault and automatic switch over to the backup. The
unit also features the patented data mirroring technology, which allows the backup CPU to
constantly maintain the same state as the main CPU. Downloaded tables into the primary CPU
are automatically transferred to the backup CPU. Unlike competitive systems, data transfers to
the backup LTC 8901 Series CPU are automatically verified to ensure accuracy. With this
feature, if a failure of the main CPU occurs, the backup CPU will be in the exact same state
that the main CPU was in prior to failure - all appropriate video will be on the monitors,
sequences will be running, alarms will be active, etc. One LTC 8901 Series CPU bay per
system is required.A LTC 8901 Series CPU bay includes two power supplies (LTC 8905), two
CPU modules (LTC 8910), and a relay module (LTC 8917).
LTC 8902 Series Output Bay
The LTC 8902 Series Output Bays generate the text overlays for the video monitors. Each bay
accepts up to 8 LTC 8934/00 Video Output Modules providing output for up to 64 monitors.
For more outputs, additional output bays can be used up to a maximum of 8 bays providing
512 monitor outputs. Each LTC 8902 Series Input Bay includes one Data Receiver module
(LTC 8916) and a power supply (LTC 8906).
LTC 8903 Series Input Bay
The LTC 8903 Series Input Bays provide the video switching functions. Each bay accepts up to
16 LTC 8921/00 Video Input Modules providing up to 256 camera inputs. Because of it’s
unique video bus design, the LTC 8903 Series bay is capable of switching 256 cameras to a
group of 32 monitors using only 8 LTC 8921/00 Video Input modules. When 16 LTC 8921/00
modules are installed in a LTC 8803 Series bay, 256 cameras can be switched to up to 64
monitors.The Input Bay provides full matrix switching – any input can be connected to any
output. Up to 4 LTC 8903 Series Input Bays can be connected directly to a LTC 8902 Series
Output Bay. This configuration can handle up to 1024 camera inputs. To handle a greater
number of cameras, a second stage of LTC 8903 Series bays can be used. In this
configuration, the outputs of up to 4 LTC 8903 Series Input Bays are connected to the camera
inputs of another LTC 8903 Series Input Bay. The outputs of this second-stage bay are then
connected to an LTC 8902 Series Output Bay. Up to 4 second-stage LTC 8903 Series Input
Bays can connect to the LTC 8902 Series Output Bay, for a total capacity of 4096 camera
inputs. When multiple LTC 8902 Series Output Bays are used in a system, the LTC 8903 Series
Input Bay configuration must be duplicated for each output bay. The camera signals to the
4
4.1
4.2
4.3
4.4
LTC 8900 Series
System Components | en
17
Bosch Security Systems, Inc.
Installation Manual
2015.01 | 10.6 |
