WARNING: The PCB edge connector is at the bottom of the switch. Avoid installing the switch upside down.WARNING: Electrostatic discharge (ESD) damage can occur if components are mishandled. Always wear an ESD-preventive wrist or heel ground strap when handling the S5000 and its components.CAUTION: DO NOT mix airflow directions. The airflow directions are color coded. A red label indicates that hot airis expelled from the PSU and a blue label indicates that hot air is expelled from the I/O. Both fans must use thesame airflow direction (I/O to Utility or Utility to I/O). The power supplies and fans must have the same color strap.If you mismatch the airflows, the following error message appears and the system shuts down:00:02:19: %S5000:0 %CHMGR-2-PSU_TYPE_AIRFLOW_MISMATCH: Mismatching PSUairflow detected. Unit 0 shall get shutdown in next 60 seconds if mismatchnot rectified. 00:02:19: %STKUNIT0-M:CP %CHMGR-1-PSU_AIRFLOW_COMBO_MISMATCH: Major alarm: Mismatching PSU airflow detectedin unit 0Installing a DC Power Supply1. Remove the PSU from the electro-static bag.2. Use the grab handle to slide the PSU into the switch PSU slot (install the PSU-exposed PCB edge connector first).The PSU slot is keyed so that the PSU can be fully inserted in only one way. When you correctly install the PSU, itsnaps into place and is flush with the back of the switch.Figure 18. Installing a DC Power Supply1. Slot 0 (for DC PSU 0)2. Release latch3. Strip the insulation from the ends of the DC power wires, exposing approximately 13 mm (0.5 inch) of copper wire.WARNING: Reversing polarity when connecting DC power wires can permanently damage the power supplyor the system.4. Insert the copper ends into the mating connectors and tighten the captive screws at the top of the matingconnector using a #2 Phillips screwdriver.22