H3C Technologies H3C S5800 Series Switches - Manual (Page 8)

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The PSR300-12A, PSR300-12A1, and PSR300-12A2 power modules are
the same in appearance except the mark. The PSR300-12D1 and
PSR300-12D2 power modules are the same in appearance except the
mark. This section uses the PSR300-12A and PSR300-12D1 as
examples.
Figure 1 PSR300-12A panel
(1) Power switch (push "O" to switch off and push "—" to switch on)
(2) AC receptacle
(3) Tab
(4) Handle (5) LED for DC output
(6) LED for AC input (7) Bail latch
(8) Captive screw