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Service manual CS3000
Chapter 3: Rack CSR-3200 3-42
The circuit boards of the central unit
Document no.:
S-4-007.875/E
Prepared:
1995-03-17 Fia
Revision:
R4 2004-03-15 BM
© 2002, Consilium Marine AB
Rack CSR-3200
General
All PCBs in the central unit are mounted in a rack with a back plane. The back
plane supplies all the PCBs with power and channels for communication
between them. The rack has room for 14 PCBs. If needed, several racks can be
inter-connected. The rack fits into a standard 19" cabinet.
Handling
Reserved PCB locations
Certain slots in the rack are reserved for special purposes.
The relay board ARK-2 must be placed in slot #1 of the first rack and is the
only board allowed in this slot. If there are more than one rack inter-connected,
slot #1 in the other racks must be empty.
The alarm processor board LPK-2 must be placed in slot #2 of the first rack
and all boards communicating with the LPK-2 via the address and data bus
must be in the same rack. If there are more than one rack inter-connected, slot
#2 in the other racks may be used for other purposes.
If the interface board GSK-2 is used it may be placed in any available slot,
with the above exceptions. In this case a loop processor board SPK-2 must be
placed in the last slot (#14) of one of the racks.
Settings
The only necessary setting on the rack is made when an interface board GSK-2
shall be used for the connection of sections with conventional digital detectors.
In this case a SPK-2 board in slot #14 will be using the internal IDA-loop, and
therefore the two jumpers S01 and S02 must be set in their upper positions.
These two jumpers are normally set in their lower positions by the factory.
Function
Each board occupies 30 mm of the width of the rack. The slots in each rack are
numbered #1 - #14.
If more than one rack shall be inter-connected, this is done with flat cables
connected to headers on the rear side of the racks.
In order to prevent noise from loads connected to the relay board ARK-2 from
interfering with other boards, the power to the rack is divided in two separate
channels, one supplying the relay board and one for the rest of the rack.