在诊断输入／输出故障时，**方法是区分究竟是模块自身的问题，还是现场连接上的问题。如果有电源指示器和逻辑指示器，模块故障易于发现。通常，先是更换模块，或测量输入或输出端子板两端电压测量值正确，模块不响应，则应更换模块。若更换后仍无效，则可能是现场连接出问题了。输出设备截止，输出端间电压达到某一预定值，就表明现场连线有误。若输出器受激励，且LED指示器不亮，则应替换模块。如果不能从I／O模块中查出问题，则应检查模块接插件是否接触不良或未对准。**后，检查接插件端子有无断线，模块端子上有无虚焊点。BOSCH 1827414040VALVE
NORGREN RMK00RKXEXS0A AIR ConTROL VALVE INLET 150 PSIG, OUTLET 50 PSIG MAX
AUTOMATIC VALVE 408B221A1A
NIB PARKER RG2HM0221 R-GLAND KIT HMI 22MM GP 1/6''
LUBRIQUIP MXP-075S
BIMBA MRS-041-DXDEZ PNEUMATIC CYLINDERS BORE:3/4 STROKE:1IN
PARKER F800B FLOW ConTROL VALVE 2000PSI, 138 BAR MAX, 15GPM, 57LPM
NIB BOSS 001400 PRESSURE GAUGE 0-100PSI,4.5", 1/4" NPT
EVER-TITE 1-1/2-C-316 STAINLESS STEEL COUPLER 1-1/2", 3"BARB END, 112C316
MARSH INSTRUMENT CO.N1518-30
BROOKS 1350GB6CFG1A
WORCESTER ConTROLS RK44PMR17
NORGREN QM/46025/21 MOUNTING BLOCKS LINTRA-CYL 25MM