38  IBM z15 (8561) Technical Guide Feature Code Description Comments 0503 Model T01 Supports CPs and specialty engines 0655 One CPC Drawer Feature Max34 0656 Two CPC Drawers  Feature Max71 0657 Three CPC Drawers  Feature Max108 0658 Four CPC Drawers  Feature Max145 0659 Five CPC Drawers  Feature Max190 2271 CPC1 reserve Reserve A15 location for future add CPC1 (Max34 to Max71 upgrade) 2272 CPC2 reserve Reserve A20 location for future add CPC2 (Max71 to Max108 upgrade) Frames and cooling 4033 A Frame Radiator (air cooled) 4034 A Frame Water cooled 4035 B Frame Radiator (air cooled) 4036 B Frame Water cooled 4037 Z Frame I/O drawers only 4038 C Frame I/O drawers only PDU power 0629 200-208V 60A 3 Phase (Delta -  “ ∆ ”$_{)}$ North America and Japan 0630 380-415V 60A 3 Phase (Wye-  ”Y”) Worldwide (except North America and Japan) BPA power 0640 Bulk Power Assembly (BPA) Quantity 1 = 2 Bulk Power Enclosures Quantity 2 = 4 Bulk Power Enclosures 3003 Balanced Power Plan ahead Only available with BPA 3016 Bulk Power Regulator (BPR) Quantity per BPA feature: Min. 2, max 6 (in  pairs) 3217 Internal Battery Feature (IBF) Quantity per BPA feature: Min. 2, max 6 (in  pairs) I/O 4021 PCIe+ I/O drawer Max. 12 (PDU) or max. 11 (BPA) 7917 Top Exit Cabling  Includes cable management top hat 7919 Bottom Exit Cabling Includes rear tailgate hardware at bottom of  frame 7928 Top Exit Cabling without Tophat Uses rear slide plates at top of frame Table 2-1 Key features that influence the system configurations