描述
早期的PLC以数字量的顺序控制为主。随着PLC功能不断扩充，PLC增加了模拟量控制功能、PID调节功能、通讯联网功能及分级控制功能等，在过去DCS占统治地位的化工、冶金等行业也可由PLC进行控制。但PLC难以组成大型、复杂、综合的系统，如果过多的PC企图通过网络与过多的PLC通讯，则可能导致瓶颈现象及计时上的困难。
CCI Electrical Dist. Junction Box 208V, 50A, 3-Phase
TEGAL Electrical Dist. Junction Box 208V, 40A, 3-Phase
TEGAL Electrical Dist. Junction Box 208V, 25A, 3-Phase
Leybold Pump Station Housing WS1001-100P
Terra Universal WIP Rack Stainless Steel Cleanrom Table
MKS Control Valve Type, 6 Inch Diameter Ring, NIB
Heater Elements for Kimmon DI Water Heater(LOT OF 6)
Retrofit Kit for NOAH Wetsink Dual Asperator Manifold
