H3C Technologies H3C S12500 Series Switches - Manual (Page 15)

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