描述
从可靠性和可维护性上看,由于电器控制系统使用了大量的机械触点,其存在机械磨损、电弧烧伤等,寿命短,系统的连线多,所以可靠性和可维护性较差。而PLC大量的开关动作由无触点的半导体电路来完成,其寿命长、可靠性高,PLC还具有自诊断功能,能查出自身的故障,随时显示给操作人员,并能动态地监视控制程序的执行情况,为现场调试和维护提供了方便。
Neslab Chiller HX-75A, TU-1 pump, No Compressor
UNIT UFC-1660, N2, SF6, Ar, lots of 3 used, as is
Leybold Quadruvac Q100 mass spectrometer, with cables
MITSUBISHI PLC A1S62PN, A1SHCPU, A1SX41, A1SX81, A1SY10
MOTOROLA MVME 2304-900, 147-011 84-W8964B01G, PCB
AMAT 0226-97904 Throttle valve for Etch Chamber, New
3 SMC NP420-DN1 SERIAL INTERFACE UNIT, SMC Manifold
GE FANUC SERIES 90-30 PROGRAMMABLE CONTROLLER, GE PLC
MISSING PULSE VME ELAS 016763 FB-B94V-0 PCB
MVME 2301-900 MOTOROLA 01-W3345F, PCB
LAM ceramic ring 716-011830-006
ICS ADVENT OEMC-06-06 module controller
CTI CRYOGENICS NETWORK INTERFACE, CTI MODEL 8113020G001
3 STEC MFC SEC-4400M BCl3 100 SCCM, used