描述
某些输入信号不进入PLC系统中有些信号功能简单、涉及面窄，如图6中的手动按钮、过载保护的热继电器触点等，有时就没有必要作为PLC的输入，将它们设计在PLC外围的硬件电路中同样可以满足控制要求。如果外部硬件电路过于复杂，则应考虑仍将有关信号送入可编程序控制器
New Sealed NetApp X2055A-R6 HBA 2 Port 4GB PCIe Qlogic
NetApp FAS960 Filer Head FAS SAN/NAS 2x Xeon 2.2GHZ/6GB
NetApp X511A-R5 114-00021 110/220 VAC PSU Power Supply
Netapp X282B-R5 500GB SATA Hard Drive
NEW Netapp X298A-R5 1TB SATA FAS2020 FAS2040 FAS2050
$825 each WITH TRADE in of 144GB X286A-R5 SAS Drive
One-day shipping available
New NetApp X2055A-R6 HBA 2 Port 4GB PCIe QLogic
Expedited shipping available
NETAPP NVRAM5 NetApp With Battery 512MB Memory 111-0002
Lot 5 Network Appliance NetApp NetCache C6100
