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I/O Subsystem Cabling
The I/O drawers can be installed in any location open in the frame. There are no fixed locations for I/O
subsystems. The I/O drawer should be installed as close as possible to the processor subsystem that it
will be connected to, either above or below the processor subsystem.
The UPIC cables are connected to BPA A and B using the UPIC cable connections identified for the
processor subsystem in the U location in the frame. For example, an I/O subsystem installed in frame
location U19 will be identified as U1.19 and is attached to the BPA connections from DCA 1 to BPD1-A
and BPD1-B connector P09, and from DCA 2 to BPD1-A and BPD1-B connector P08.
Example of I/O Cabling to Processor Subsystem (Not Looped)
The following illustration shows cabling from each side of an I/O subsystem to two processor subsystems.
1 I/O Subsystem Port 1
2 I/O Subsystem Port 0
3 RIO (or RIO-2) Port A1
4 RIO (or RIO-2) Port A0
5 7040 Model 61D I/O Subsystem
6 Processor Subsystem
Appendix G. Cabling Information
159
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