3211 System Boards and Internal Cabling
CS500 model 3211 system boards and cabling diagrams.
Each node tray includes a series of boards that are described below. When adding or removing components from the node tray, make sure cables are routed correctly before plugging the node tray back into the chassis. Use caution to make sure no cables or wires are pinched and that the airflow from the fans is not blocked.
- Power Distribution Module
- The power distribution module is at the middle of the chassis and consists of two Power Distribution Boards (PDBs) to support Common Redundant Power Supplies (CRPS). The PDB provides +12V and +12VSTB output to the server chassis. Each PDB has two 2x9 power output cables that connect to the backplane and one 2x8 signal control cable for power management that also connects to the backplane.
- Backplane Interposer Board (BIB)
- The backplane interposer board (BIB) is only used in 24 x 2.5” drive chassis as the interposer between the backplane and the power docking board to connect the power and miscellaneous signals from the backplane to the compute modules. Two backplane interposer boards are pre-assembled with the 24 x 2.5” drive backplane in the server chassis to support four compute nodes. The BIB is a completely passive board, which contains connectors on both sides of the board to connect to the backplane on the front side and the power docking board on the back side. Two front panel connectors with the same signals routed are placed on the BIB for easy of cabling to the front panel on each side of the chassis. Each connector integrates the control signals of two compute nodes.
- Power Interposer Board (PIB)
- The power interposer board is only used in 24 x 2.5” drive chassis as an electrical interface between the power distribution board and the backplane.
- Backplane
- Drives interface with the passive backplane through a blind mate connection when drives are installed into a drive bay using hot-swap drive carriers. Each compute module has dedicated Hot Swap Controller (HSC) to manage three or four drives. There are a total of four sets of independent Programmable System On Chip (PSOC) devices on the backplane, to function as HSCs to the four compute modules.
- Backplane LED Support
- Each drive tray includes separate LED indicators for drive Activity and drive Status. Light pipes integrated into the drive tray assembly direct light emitted from LEDs mounted next to each drive connector on the backplane to the drive tray faceplate, making them visible from the front of the system.
