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。最后，检查接插件端子有无断线，模块端子上有无虚焊点。
Siemens Analog Control Module 6SC6100-0NA11 Used
O-Z/Gedney Right Angle Conduit Clamp UBC-100G 1" (10)
Thomas & Betts Hex Head Cap Screw Steel 3/8" x 1" (200)
John Crane Mechanical Seal Type 1 DBL 1-3/4"
Stahl Steel Cable Wire Rope 9mm. x 27.8 Meters
Siemens Capacitor B25835-K0334-K007
Signode Thickness Shim P
Browning Sheave Pulley 58 2B SDS
Jamesbury Electric Actuator EHX90 Model A
Parker D Sol/Air Body Kit PS1401
North B-Safe Ball Valve Lockout BS-02 (Lot of 3)
Haitima Stainless Steel Ball Valve Wafer 2"
Vickers Hydraulic Directional Valve DG4V3 2A WB10 E
Trico Sight Liquid Level Gauge BE (Lot of 3)
Martin Bushing SK 1-3/8"
ABB Current Transformer 3AFE ACS
Resistoflex PTFE Lined Reducing Tee 4" X 2"
Thorburn Expansion Joint HFC-VC-AC--50.75/338
Foxboro Pressure Transmitter IDP10-D23D01C-M2L1C1K
Allen-Bradley 4 Pin Micro Straight Cable 889R-F4AEA-5
Foxboro Magnetic Flow Transmitter IMT25-PDADB10K-G
JC/Trueline 6" Ball Valve 515AIX-HT-65
Ham-Let Adaptor Let-Lok Female NPT 739LF SS 10mm X 1/4
Maxon Shutoff Valve Natural Gas 808 CP 2, 3"
Parker Flow Control Valve F800B
Westinghouse Molded Case Switch KD3400KW
Tel-Tru Thermometer 5" dia, 15" long AA575R, C
Allen-Bradley Power Terminal Block Y (Lot of 2)
Allen-Bradley Voltage Module N800E-2DL5A (Lot of 6)
Leine & Linde Incremental Encoder
3R Industries Aramid Fibers Gasket 3R 865 19" Dia. (4)
Burkert Safety Shutoff Valve 311-C-7/64-F-BR 1/8