描述
I/O点数估算时应考虑适当的余量，通常根据统计的输入输出点数，再增加10%～20%的可扩展余量后，作为输入输出点数估算数据。实际订货时，还需根据制造厂商PLC的产品特点，对输入输出点数进行圆整。
DEC HA205AA POWER SUPPLY
DEC RZ73-E-AF SCSI DRIVE FOR BA440BOX
DEC VX217-DA 1 VX20A-CB,VRC16-CA,
HEWLETT PACKARD C4215A HP LASERJET 8100N PRINTER
MISC 680QJ-B9 BA440 VAX4000-500 KA680-AA BOX
DEC BA22A-B9 VAXFT 810 SYSTEM BOX
HP INTEGRITY BL860C AD323A (2) 1.6GHZ SERVER 448066-001
COMPAQ 234082-001 12-LINE PWR INJECTOR*NEW*
DEC 54-19369-03 DEFEB FI SAS SM DUAL MODULE
DEC 54-30370-01 FORCE COMPUTER MODULE
DEC 54-22629-01 CBUS/PCI/VME BACKPLANE
DEC 54-24758-07 ALPHA DP264 DAUGHTER CARD
DEC 54-24758-06 ALPHA DP264 DAUGHTHER
DEC 70-31648-01 LAN40 BOARD W/BRACKET
