loadingDCA 31 = E2 DCA 32 = E3
Motor Drive Assemblies are: A-1, A-2 on front lower left A-3, A-4 on front lower right A-5 on rear upper left A-6 on rear upper right
Motor Scroll Assemblies are:
A1-A1 is a housing with 2 blowers front left A3-A1 is a housing with 2 blowers front right A5-A1 is a housing with single blower rear left A6-A1 is a housing with single blower rear right
P1 is the backplane in the middle of the enclosure. The nodes, DCAs, FSPs, osilators and the system VPD plug into this backplane.
P6 is in the front, it is a light strip used to identify components associated with the front of the system. P7 is in the rear, it is the light strip used to identify components associated with the rear of the system.
On the rear of the system you have connections for:
System VPD - located on the system backplane above and between the osilators, location code is C5 FSP 0 is the right side FSP, with location code of C4 FSP 1 is the left side FSP, with location code of C1
Power Overview
Power
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2 redundant standard BPAs in the CEC A frame and (if needed) in the CEC I/O frame provide Bulk power to the system
There is an IBF feature to provide bulk power to the system in case of temporary line disturbances. The IBFs are connected to the BPA but physically reside in an I/O drawer slot
Each book in the CEC cage and each I/O drawers have n+1 DCAs to convert the bulk voltage to logic level voltage
Concurrent maintenance of all Power FRUs
Power Cage
Each A frame in the configuration has a single redundant BPA which contains (per side)
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1 AC line input cord
1-3 BPRs to convert AC to 350v DC
1 BPC which controls the BPA and distributes 350v DC to some of the logic 1-3 BPDs distributes 350v DC to some of the logic 1 BPF for air-cooling the BPA
CEC Cage Power
3 DCA's per node book provide N+1 logic DC levels
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The DCA trio located on the CEC cage back, behind the node they support
Node books are isolated into their own power planes which allows the system to poweron/off individual nodes within the CEC cage
Logic board mounted DCAs
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Each installed node has 3 DCAs on CEC board back 2 DCAs on each I/O drawer
EPO Panel
In addition to EPO functions, provides
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Single panel mount UEPO switch Can be bypassed for service Supports room EPO connection Ambient Air temperature sensor System attention LED
Note: The Green and White Power Service Buttons are inactive
IBF feature
Each BPR or BPR pair (non-redundant mode) can have one battery installed to keep power up in case of temporary line disturbance
CEC A Frame
Note: Power components are in Red
Full-drawer cabling
For an I/O drawer, the following connections are required.
_ One cable from the P1 RIO-2 Riser card J0 to CEC I/O card Px-Cx-T1. _ One cable from the P2 RIO-2 Riser card J1 to CEC I/O card Px-Cx-T2. These cables provides a data and communication path between the memory cards and the I/O drawers (Figure 2-11).
_ A cable is also added between P1 RIO-2 Riser card J1 and P2 RIO-2 Riser card J0 in each drawer.
This cable ensures that each side of the drawer (P1 and P2) can be accessed by the CEC I/O (RIO-2 adapter) card, even if one of the cables are damaged. Each half of the I/O drawer can communicate with the CEC I/O card for its own uses or on behalf of the other side of the drawer.
There is an identifier (ID) in the cable plugs which gives the length of the cable to the Inter-Integrated Circuit (I2C) bus and the service processor.
The cable ID is the function that verifies the length of the RIO-2 cable. There are different RIO-2 cables, because we use CEC frame, powered 24 inch A frame, and unpowered 24 inch Z frame for the I/O drawer. With the cable ID we calculate the length and the link speed for the RIO-2 cable.