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#### Internal System Cables

The following table identifies the internal system cables used in SPARC T3-1 servers.

Cable | Description
--- | ---
Top cover interlock cable | This cable connects the safety interlock switch on the top cover to the power distribution board. When the top cover is removed, this connection is broken, which causes the server to power down.
Power supply backplane signal cable (1 ribbon cable) | This cable carries signals between the power supply backplane and the power distribution board.
Motherboard signal cable (1 ribbon cable) | This cable carries signals between the power distribution board and the motherboard.
Hard drive data cables (2 bundled) | This cable carries data and control signals between the motherboard and the hard drive backplane.
SATA DVD data cable | This cable carries data and control signals between the motherboard and the DVD module.
Power and fan management data cables between the connector board and the fan power distribution board | These cables distribute power to the fan power board as well as carry control and sensor information between the fan modules and the connector board.

##### Related Information

- Infrastructure Boards in the SPARC T3-1 Server

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