Description
过程控制与INTERNET网络相连，会受到病毒或黑客的侵入。一定要加安全级别、数据单向传输和加防火墙。以太网之间的协议遵从OSI模型（Open System Interconnection）的七层协议。七层协议分别是物理层、数据链路层、网络层、传输层、会话层、表示层和应用层。物理层描述传输介质、连接器和信号脉冲标准。中继器或集线器（hub）也是物理层的设备，它与传输的信息帧的具体内容无关。帧是发送到介质上的一组数字脉冲。用以传输信息。
Rexroth Bosch 1PF2GN2-21/025RE07MU2 B85686 K48 596377/2 Hydraulic Pump REM
CRS Vickers PVB10 FLSFW Hydraulic Variable Piston Pump 10 GPM NIB
Square D LX 125 Amp LX36125G I-Line Breaker LX36125 w LSIG Trip 125A
Siemens 1FK7060-5AF71-1DU5-Z Servo Motor with gear reducer 3000 M 1FK70605AF71
Siemens 1FK7060-5AF71-1PH3-Z 3 PH 7200 RPM Servo Motor 1FK7060-5AF71
GE Fuji 15HP 6KAF343010E$A1 AF-300E$ VS Drive 480V 3PH General Electric 15 HP
General Electric 734X2G32 Type M-90 Demand Register 700X567G8 Watthour Meter GE
Roman TR-56AX Welding Transformer TR56 120 KVA 440V REM Refurbished
Mitsubishi/Freqrol FR-F520-7.5K AC Inverter Drive F500
Cutler Hammer Unitrol F10 Size 4 Contactor MCCB 150 Amp MCC Bucket C10FN3
Bently Nevada 3300/55 Dual Velocity Monitor 03-04-05-05-00-00-07-00 PLC Module
