描述
PLC内部输入电路作用是将PLC外部电路（如行程开关、按钮、传感器等）提供的符合PLC输入电路要求的电压信号，通过光电耦合电路送至PLC内部电路。输入电路通常以光电隔离和阻容滤波的方式提高抗干扰能力，输入响应时间一般在0.1~15ms之间。根据输入信号形式的不同，可分为模拟量I/O单元、数字量I/O单元两大类。根据输入单元形式的不同，可分为基本I/O单元、扩展I/O单元两大类。
NetApp R200 System Board 110-00026 DG7HCV
Expedited shipping available
NetApp Data ONTAP 6.5 R200 NEW in BOX 310-00166
Network Appliance NetApp X2050B Dual 2Gb FC Optical HBA
One-day shipping available
Network Appliance NetApp FAS960C w/ Cards AS IS
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Network Appliance NetApp F720 Filer Head 1211
NetApp X272A 72GB 10K FC-AL Universal Disk DS14 DS14MK2
NETAPP, 108-00056 – 73GB Fibre Channel 10K RPM DS14 MK2
NetApp CF boot card PLRXPL-VI-S24-22 FTRJ8519P1BNL
