*
CPM/Basic

*
CPM/Airplane condition monitoring function (CPM/ACMF)

*
CPM/Graphics generator (CPM/GG).

Core Processor Modules
The CPM has internal slots for up to 7 circuit card assemblies (CCAs). The CPMs all have five basic CCAs. The remaining internal slots for CCAs contain unique CCAs to make each CPM different.
These are the five basic CCAs:
*
Power supply CCA

*
Backplane interface/power monitor (BIPM) CCA

*
Processor CCA

*
Instruction Memory CCA

*
Data memory CCA.

The CPM/Comm has a sixth and a seventh CCA. These are the multifunction CCA and the fiber optics CCA. The purpose of the multifunction CCA is to:
* Transmit ARINC 717 formatted data
EFFECTIVITY
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* Transmit and receive datalink data for the center and right VHF communication transceivers.
The fiber optics CCA transmits and receives data for the onboard local area network.
The CPM/Basic does not have any additional CCAs. It only has the 5 basic CCAs.
The CPM/ACMF has a sixth CCA. This CCA is the ACMF memory CCA. It supplies the static random access memory (SRAM) for the ACMF.
The CPM/GG has a sixth CCA. This CCA is the graphics generator CCA. This CCA has the weather radar and high speed coax interfaces necessary to support the displays.
Physical Description
The dimensions of the CPM/GG, CPM/Basic, and CPM/ACMF are:
*
4.18 inches wide

*
15 inches deep (includes the handle assembly)

*
7.2 inches high.

The CPM/Comm dimensions are the same except it is 6 inches wide. It is wider than the other CPM because it has the fiber optics connector.
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AIMS -CORE PROCESSOR MODULES

The weight of the four CPM types is:
*
CPM/Comm -15.7 pounds

*
CPM/ACMF -13.5 pounds

*
CPM/Basic -12.3 pounds

*
CPM/GG -13.4 pounds.

Installation
The CPMs have a hot insertion switch on the rear surface. This insertion switch keeps the cabinet +28v dc from the CPM until it makes positive contact between the CPM ARINC 650 connector and the backplane pins of the cabinet.
Each CPM has a unique keyed connector, except for the CPM/ basic and CPM/ACMF. Because the CPM/basic and CPM/ACMF are in the same cabinet position they have the same keyed connector. This allows the left and right cabinet to have the same part number.
Training Information Point
Although the CPM/Basic and CPM/ACMF have the same keyed connector, do not install a CPM/Basic in the left cabinet chassis. If you install the CPM/Basic in the left cabinet with the proper software, the CPM reports a hardware and software incompatibility to the central maintenance computing function.
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AIMS -CORE PROCESSOR MODULES

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AIMS -CABINET CHASSIS POWER DISTRIBUTION FUNCTIONAL DESCRIPTION

General
A signal distribution area goes along the full width of the rear of the cabinet chassis. This area has a backplane power bus for power distribution.
Four power sources and the hot battery bus power source connect to an AIMS cabinet. The backplane power bus distributes the power inputs to each LRM. Power contacts on the LRM connector connect directly to the power backplane.
The steady state load is 700 W.
Input Power
Each cabinet receives four 28v dc inputs. The sources of 28v dc for the left AIMS cabinet are the 28v dc capt flight instrument bus and the 28v dc F/O flight instrument bus. The sources of 28v dc for the right AIMS cabinet are the 28v dc left bus and 28v dc right bus.
The four 28v dc bus inputs are power 1 through power 4. Power 1 and power 2 enter the cabinet through a connector on the left side of the cabinet. Therefore, power 1 and power 2 are left power.
Power 3 and power 4 enter the cabinet through a connector on the right side of the cabinet. Therefore, power 3 and power 4 are right power.
EFFECTIVITY
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Each LRM receives power from four sources, two for main power and two for monitor power. The main circuitry uses the main power. Special circuits that monitor the condition of the power supply in the LRM use the monitor power. The two main and two monitor sources of power for each LRM come from different power sources.
Each LRM must have at least one main and one monitor power input to operate.
　
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