H3C S12500 Installation Manual page 14

Figure 2 S12508 rear view
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(1) Power entry module (PEM)
(3) Lower fan tray
(5) Grounding screw
(7) Switching fabric module slots (slots 10 to 18)
(9) Power air exhaust vents
The S12508 chassis has the following slots and components:
Two MPU slots and eight line card slots at the front, and nine switching fabric module slots at the
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rear.
One power frame, at the top of the chassis, can accommodate up to six power supplies.
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Two horizontally oriented fan trays at the rear of the chassis. For the ventilation inside the chassis,
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see Figure 7.
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(2) Upper fan tray
(4) Ventilation panel
(6) ESD-preventive wrist strap port
(8) System air exhaust vents
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