121NOTE:The rack unit (RU) specifies the rack height, and 1 RU is 44.45 mm (1.75 inch).Power module ordering guideSupport for power module models depends on the S7500E chassis model. You can order powermodules according to the power supply environments and power consumption requirements. For moreinformation, see Table 40 and Table 41.• Make sure that the total maximum output power of the ordered power modules is greater than theoverall power consumption. H3C recommends that you reserve 20% of the maximum output power.• If the switch is expected to supply power for attached devices through PoE, order a power modulethat can be used for setting up a PoE system depending on the switch model, and make sure that themaximum PoE output power of the power module is greater than the PoE power consumption.• Generally, the S7502E and S7503E-S switch use power modules of 1 RU high, and the otherS7500E switches use power modules of 3 RU high.• To enable flexible ordering of power modules for different overall power consumptions, H3Cprovides a power module adapter PWR-SPA, which allows you to insert a power module of 1 RUhigh to a power module slot of 3 RU high. When the overall power consumption of an S7503E,S7506E-S, S7506E, or S7506E-V does not exceed 650 W and the switch does not supply powerthrough PoE, you can use the PWR-SPA together with a power module PSR650-A/PSR650-D tosupply power for the switch.NOTE:• For more information about installing power modules and power module adapters, see the chapter“Installing modules.”• For more information about the overall power consumption and PoE power consumption, see thechapter “Appendix A Hardware specifications.”• For more information about supplying power through PoE, see the chapter “Installing modules.”Table 41 Power module and chassis compatibility matrixChassis (right)Power modulemodel (below)S7502E S7503E-S S7503E S7506E-S S7506E S7506E-V S7510EPSR320-A z z — — — — —PSR320-D z z — — — — —PSR650-A z z { { { { —PSR650-D z z { { { { —PSR1400-A — — z z z z zPSR1400-D — — z z z z zPSR2800-ACV — — z z z z zPSR6000-ACV — — z z z z z
