H3C Technologies H3C S5800 Series Switches - Manual (Page 9)

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Figure 2 PSR300-12D1 panel
(1) Power switch (push "O" to switch off and push "—" to switch on)
(2) DC power receptacle
(3) Tab
(4) Handle (5) LED for DC output
(6) LED for DC input (7) Screw hole for securing the plug
(8) Captive screw
LEDs
The PSR300-12A, PSR300-12A1, PSR300-12A2, PSR300-12D1, and
PSR300-12D2 power modules each have two LEDs.