21Figure 31 Removing an LSWM1FANSA fan trayInstalling/removing power modulesWARNING!• To avoid bodily injury and device damage, strictly follow the procedures in Figure 32 and Figure33 to install and remove a power module.• Provide a separate circuit breaker for each power module.The S6820-32H and S6820-56HF switches each have two power module slots. The S6820-4Cswitch has four power module slots. The S6820-32H and S6820-56HF switches come with onepower module slot empty and one installed with a filler panel. The S6820-4C switch comes with twopower module slots empty and two installed with filler panels. You can install power modules for theswitch as required.For information about the available power modules, see "Appendix B FRUs."Figure 32 Installation procedureFigure 33 Removal procedureInstalling a power moduleCAUTION:• Follow the forward inertia of the power module when inserting it into the chassis, and make surethe power module has firm contact with the connectors on the backplane.• To prevent damage to the connectors inside the switch chassis, insert the power module gently. Ifyou encounter a hard resistance while inserting the power module, pull out the power moduleand insert it again.The LSVM1AC650 and LSVM1DC650 installation procedure is the same on the S6820 switches.The figures in this section use the S6820-32H switch as an example.