Installation ManualH3C S7500 Series Ethernet Switches Chapter 1 Product Overview1-17风扇框机箱拉手电源模块主控板业务板Power m oduleLPUsSRPUsFan trayChass is handle风扇框机箱拉手电源模块主控板业务板Power m oduleLPUsSRPUsFan trayChass is handleFigure 1-10 Chassis of the S7506RThe rear panel of the chassis of the S7506R is similar to that of the S7506. For thelayout, see Figure 1-9.Each area is hot-swappable.z In the board area, there are eight horizontal slots. The topmost two slots are forrequired SRPUs. The S7506R provides SRPU redundancy backup. The other sixare for optional LPUs.z The fan area is on the right of a chassis. The fan tray slot is vertical.z The power module area is at the bottom of the chassis and contains three powermodule slots to implement 2+1 redundancy. You can select AC power modules forAC power input or DC power modules for DC power input as required.z The power distribution area is at the chassis bottom near to the back panel. Thereis an AC power distribution box for AC power input or a DC power distribution boxfor DC power input.z There are a –48 VDC power input terminal and a COM port (PoE managementport) on the back of the PoE-capable S706R chassis.1.5.2 Color of Board Edgesz The boards that can only serve as SRPUs of the S7503/S7506/S7506R have pinkedges.z The boards that can only serve as LPUs of the S7503/S7506/S7506R have purpleedges.z The boards that can not only serve as SPRUs of the S7502, but also LPUs of theS7503/S7506/S7506R have green edges.
