IBM Series 1 User Manual page 71

Pigure 2-20. Pover-on resets as
they
affect the 1/0 channel
Processor units
4955 without channel repower card
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'----r--..I....:-......
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4955 with channel repower card
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-11<L.....L~p--.;::..-
PO
R
I/O expansion units
I/O expansion unit 1
---!
Power supply
Outboard POR
I/O expansion unit 2
r-------
I
Outboard
POR
4953
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I/O expansion unit N
.... - - POR
Key:
r:r----J
I/O cable and connector showing power-on reset (POR)
lJd-
POR
~pR l.:J
Channel repower card
POR: Power-on reset
BBU: Battery back-up (optional)
2-56
GA34-0033
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Unit POR
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