描述
数据链路层描述本地系统之间的拓扑和通信标准。以太网能与多个物理层标准（双绞线线缆、光缆）和多个网络层标准一起工作。将网络的物理方面（线缆和数字脉冲）与软件和数据流的抽象世界连接起来。在网络里传的信息是以帧的格式传输的。
Fanuc PC Board, A02B-0004-0170, DC Servo Drive Board
Siemens Output Module, #6ES5 458-7LA11, 6ES54587LA11
US Motors Synchrogear Module,# SDP, C01R28801031853007F
Fuji 250 Amp Circuit Breaker, BU-JSB3250
Volkmann Adjustable Frequency Drive AD-1 AD-1-G2M277-2
Jung Elektrogeratebau 234402 Gmbh 234 402 Rittal
GE Fanuc # 8F AC Servo Motor, # A06B-0348-B357 WARRANTY
Mitsubishi PC Board FW23B, BN624E523H01 WARRANTY
NEW Pei Gong Planetary Gear Reducer, # PMH50X1/57.7
Gould Modicon PC Board Axis Card, 100-0166 WARRANTY
Okuma OSP3000 Position Read Board, E4809-032-400-C
