3500/92本特利3500/923500/92本特利3500/92
PLC的程序是直接作用于对象的具体工艺过程，那么对对象具体工艺过程的理解是非常重要的的。我在与用户的交流过程中，会用我所掌握的Unit Operation的知识分析用户的工艺过程，协助用户整理过程控制中的各个逻辑关系，甚至包括各种仪表、硬件的配置。这得益于我原本所学的专业。当然，不能要求所有搞PLC程序的工程师都有我这样的经历。但是有两门知识却是*的：一是过程仪表的硬件知识，包括传感器、变送器（二次仪表）和PLC本身，这是构建控制系统的基础；二是过程控制理论，包括各种控制模型的原理和应用，其中zui重要的是二位调节和PID调节模型。
郑娟萍
厦门仲鑫航自动化设备有限公司
PID调节是目前用得zui广泛的过程控制手段，且变化多端。学习PID的方法就是读书。几乎所有讲解过程控制的书籍都有关于PID的内容，多读基本相关的书籍对理解PID是很有益处的。我发现不少网友在进入PLC领域时，缺乏这些相关知识。这并不可怕；可怕的是当事者不能静下心来弥补知识的缺陷。我们不要怪罪学校没有教授这些内容，而是要注重自己如何去学习这些知识。工作中遇到的许多问题是学校里没讲过的，这不能成为我们拒绝工作的理由，而应该以积极的态度去应对这些问题。我的体会是，为了解决工作中的问题而学习的知识，比课堂上学的东西更容易记住。
CR123C27.3B GE Overload Relay Heater Element
CR123C1.48A GE Overload Relay Heater Element
GE CR123C0.97A Overload Relay Heater Element
CR123H2.67A GE NIB Overload Relay Heater Element
CR123F43.0B GE Overload Relay Heater Element
CR123C7.78A GE Overload Relay Heater Element
CR123H5.29A GE NIB Overload Relay Heater Element
CR123C30.3B GE Overload Relay Heater Element
R0.60A Overload Relay Heater Element
CR123F30.0B GE Overload Relay Heater Element
GE CR123H0.55A Overload Relay Heater Element (NIB)
GE CR123H0.61A Overload Relay Heater Element (NIB)
N61.2A Overload Relay Heater Element
GE CR123H1.58A Overload Relay Heater Element NIB
GE CR123H0.74A Overload Relay Heater Element (NIB)
CR123F35.7B GE Overload Relay Heater Element
GE CR123H2.05A Overload Relay Heater Element NIB
GE CR123H1.44A Overload Relay Heater Element (NIB)
CR123H2.91A GE Overload Relay Heater Element
CR123H1.08A GE Overload Relay Heater Element
CR123C2.39A GE Overload Relay Heater Element
CR123H8.73A GE Overload Relay Heater Element
GE CR123H1.20A Overload Relay Heater Element
CR123H5.75A GE NIB Overload Relay Heater Element
CR123H1.72A GE Overload Relay Heater Element
CR123H14.4B GEOverload Relay Heater Element
CR123F77.2B GE Overload Relay Heater Element
CR123H4.46A GE Overload Relay Heater Element
CR123HO.90A GE Overload Relay Heater Element
CR123H3.46A GE Overload Relay Heater Element
GE CR123H1.32A Overload Relay Heater Element
CR123H8.73A GE NIB Overload Relay Heater Element
CR123C1.84A GE Overload Relay Heater Element
CR123H3.46A GE NIB Overload Relay Heater Element
CR123F61.4B GE Overload Relay Heater Element
CR123C1.18A GE Overload Relay Heater Element
GE CR123H2.24A Overload Relay Heater Element NIB
CR123H6.80A GE NIB Overload Relay Heater Element
CR123H3.17A GE NIB Overload Relay Heater Element
CR123H2.91A GE NIB Overload Relay Heater Element
CR123H4.10A GE NIB Overload Relay Heater Element
GE CR123H1.72A Overload Relay Heater Element NIB
R0.78 Overload Relay Heater Element
CR123H4.46A GE NIB Overload Relay Heater Element
GE CR123H0.61A Overload Relay Heater Element
GE CR123H0.74A Overload Relay Heater Element
CR123H0.82A GE Overload Relay Heater Element
CR123H0.82A GE NIB Overload Relay Heater Element
CR123H0.67A GE Overload Relay Heater Element
CR123H12.2B GE Overload Relay Heater Element
CR123H5.75A GE Overload Relay Heater Element
CR123H2.45A GE Overload Relay Heater Element
CR123H12.2B GE NIB Overload Relay Heater Element
CR123C0.54A GE Overload Relay Heater Element
CR123C0.48A GE Overload Relay Heater Element
B9.1 Square D Overload Relay Heater Element
81D20 Overload Relay Heater Element
B1.03 Square D Overload Relay Heater Element
81033 Overload Relay Heater Element
81035 Overload Relay Heater Element
81D27 GE Overload Relay Heater Element
Allen Bradley W31 NIB Overload Relay Heater Element
Allen Bradley W38 NIB Overload Relay Heater Element
AS4.3 Westinghouse Overload Relay Heater Element
B1.15 Square D NIB W/2 Overload Relay Heater Elements
B1.15 Square D Overload Relay Heater Element
81D254 Overload Relay Heater Element
CR123F6588 GE Overload Relay Heater Element
CR123F270B GE Overload Relay Heater Element
B10.2 Square D Overload Relay Heater Element
81D52 GE Overload Relay Heater Element
966 467-H Westinghouse Overload Relay Heater Element
Idec RTE-P11 Electronic Timer 120V
Kanson Electronics 1071-1-P-1-B Solid State Timer Relay
emecanique LRD 14 Overload Relay
emecanique LR2 D1308 Overload Relay
Idec RTY-D4N Time Delay Relay 24VDC 3A
Infitec BMR5L Digital Time Delay Relay w/ SR2P-06 Relay Socket
emecanique LR2 D1310 Overload Relay 4-6A
Schneider Electric LR2K0308 Overload Relay 1.8-2.6A
Klockner-Moeller DIL 00 B-40-NA Motor Starter Relay
Allen-Bradley 193-EA2EB Overload Relay 1.6-5.0A
Furnas 48BSK3M20 Solid-State Overload Relay 45-95A
Allen-Bradley 700-NT Pneumatic Time Delay Unit Series C
Allen-Bradley 193-EA1FB Overload Relay 3.7-12A Series B
Sprecher+Schuh CEP7-M32 Overload Relay 0.32-1.0A Series B
Allen-Bradley 700-HT12AA24 Time Delay Relay 24VAC 50/60Hz Ser. A
Allen-Bradley 700-HT22AA24 Time-Delay Relay 24VAC 50/60Hz Ser. A
Potter&Brumfield KUP-14A11-120 Relay 120V 50/60Hz
Ingersoll Rand 39403290 Relay, Auto Controls
Schleicher SZA 54-2S Time Delay Relay 250V 6A
emecanique CAD32 Control Relay 10A 600V
emecanique CA2-DN131-A65 Relay w/ LA3-D33-A65 Relay Contact Timer
Elan SRB-NA-R-C.8F/J-24V Safety Relay
Magnecraft 70-464-1 Relay Socket 10A 300V
Releco C2-A20X Relay w/ S2-S Relay socket
Allen-Bradley 700-HC24A1-4 Relay w/ 700-HN128 Relay Socket
Releco C3-A30X Relay w/ S3-B Relay Socket
Eaton D3PF2AT Relay w/ D3PA2 Relay Socket
Allen-Bradley 700-HB33A1 Relay Ser. D w/ 700-HN102 Ser. B Relay Socket
A-A Electric AAE-KUP11A-0 Relay 10A 120VAC
A-A Electric AAE-KUP14AL-0 Relay w/ 11-Slot Relay Socket
Releco C2-A20X Relay with Young Electronics NDS-8 Relay Socket
Allen-Bradley 700-HA32A1 Relay Ser. D with Relay Socket
Releco C4-A49X Relay with Relay Socket
Siemens 3RV1011-1DA10 Motor Starter Protector 600V 50/60Hz 3PH
ATC 328B 200 Q 10XX MOS Time Delay Relay with Relay Socket
Dwyer Circuit HH Amplifier - Relay Unit with Cover
Automation Direct 781-1C-24A Relay w/ 781-1C-SKT Relay Socket
Potter & Brumfield KRP-14AN-120 Relay w/ A-B 700-HN101 Relay Socket
Siemens 3UA59 00-2E Overload Relay 25-40A
Dayton 5YP98 Relay w/ SR3B-05 Relay Socket
Idec GT3F-2AF20 Electronic Timer w/ SR2P-06 Relay Socket
Finder 60.12.8.120.0030 Relay w/ Type 90.02 Relay Socket
Finder 60.13.8.120.0030 Relay w/ Type 90.03 Relay Socket
Allen-Bradley 700-HA32A1 Relay w/ 700-HN202 Terminal Base
Allen-Bradley 700-HA32A1 Relay Ser. D w/ 700-HN100 Terminal Base
Siemens 3TH2040-0AK6 Contactor Relay 410/120V 50/60Hz
Carlo Gavazzi S 195 166 115 Dual Level Relay w/ Finder 90.27 Relay Socket
Electromatic S 112166 120 S-System Interval Timer w/ Type 90.17 Relay Socket
StoneL 461017 Interface Tee .24A Protected Drop
StoneL 465026 Repeater 32 VDC
StoneL 465026 Repeater 31.6 VDC
StoneL 461017 Interface Tee .24A Protected Drop (Missing Contact Blocks)
Allen-Bradley 592-B0V16
Industrial Solid State Controls FR10701 Timer Repeat Cycle 115V 50/60Hz 10A
Finder 55.34.8.024.0040 Relay 7A 250V w/ 94.04
Curtis RS8 Relay Socket 8 Pin (Used)
Potter & Brumfield KHU17D11 Relay 120V 3A 14 Pin with Curtis RS15 Relay Socket
Finder 9902.0024.98 Relay Socket 6-24 V AC/DC
Potter & Brumfield KHAU-17A11-120 Relay 120 V 3A
Allen Bradley 700-HB33A1 Relay 240V 10A 11 Pin with RDI 211BS Relay Socket
Potter & Brumfield KHU17D11 Relay 120V 3A 110 VDC
Allen-Bradley 700-HC14A1-4 Relay 120V 3A Series A
Potter & Brumfield KHU17D11-12 Relay 120V 3A 12VDC
Allen-Bradley 700-HA33Z12 Relay Series A
Potter & Brumfield KAP14AN Relay 120V with Curtis RS11 Relay Socket (Used)
Potter & Brumfield KAP14AY Relay 120V 5A 11 Pin (NIB)
Allen-Bradley 700-HB33A24 Relay 24 VAC Series D
GE LPVR-480 Phase Voltage Monitor Relay (Used)
Allen-Bradley 700-HA32A1 Relay
Potter & Brumfield KAP11AY Relay 120V 5A 8 Pin 24V Coil (Used)
Allen-Bradley 700-HB33A1 Relay 120VAC 10A
Potter & Brumfield KHU17A11N Relay 120V 3A 28 VDC
Allen-Bradley 8-670 Photoswitch Relay 120V 24 VDC Series B
Allen-Bradley 700-HA33A1-4 Relay 120V 10A Series D
Potter-Brumfield KHAU-17A11N-120 Relay 120V 3A
Curtis RS15 Relay Socket (Used)
Idec RY4S-UL Relay 240V 5A 24 VDC
Allen-Bradley 700-HB32Z24 Control Relay Series A (NIB)
Releco C3-A30 X Relay 300V 10A 24VDC with Releco S3-S Pin Base 300V 10A
Idec RH1B-U Relay 120V 7.5A with Idec SH1B-05 Relay Socket 300V 10A
General Electric CR7CA Starter Contactor Relay
Mars 90291 Relay 125/277V 18A (Used)
Allen-Bradley 700-HB33Z24 Relay Ser B with Base
Square D 8501XO40 Industrial Control Relay 110/120V 50/60Hz
Dayton 5Z877 Relay 240V 10A 9 Pin
Allen-Bradley 40751-498-29 Overload Relay 600V
ABB TDM120AL Digi-Set Time Delay Relay 120 VAC 8 Pin (NIB)
Square D 8501XMO40 Industrial Control Relay
Diversified Electronics CMO-120-ASE-10 Time Delay Current Monitor Relay
emecanique LR2D3363 Thermal Overload Relay 600V 63-80A
Watlow LD10-1000-0U00 Relay Mercury 600VAC 35A
Finder Type 60.13 Relay w/ Type 90.73 Relay Socket
Finder 60.12 Relay with 90.72 Relay Socket
Magnecraft 781XAXML Relay w/ 70-781D-1 Relay Socket
M-System JF-00-D/5-X 2-Input Math Function Relay 115VAC
Westinghouse BF30A Control Relay 300V 10A (Broken Corner)
Westinghouse BF30A Control Relay 300V 10A
Potter&Brumfield KUP14A15 Relay with 11-Blade Relay Socket
A-A Electric AAE-KIJP14AL-0 Relay with 11-Blade Relay Socket
A-A Electric AAE-KUP14AL Relay with 11-Blade Relay Socket
Allen-Bradley 193-EA1CB Overload Relay 600V 1.6-5.0A
ATC 328C 200 Q 10 XX Time Delay Relay with Relay Socket
ATC 328C 200 Q 10 XX Time Delay Relay with Relay Socket
Allen-Bradley 592-EEDC Overload Relay 600V E1 Plus
Allen-Bradley 592-EEFC Overload Relay 600V E1 Plus
Allen-Bradley 592-EECC Overload Relay 600V E1 Plus
Allen-Bradley 700-PK800B11 AC Relay 600V Series B
Allen-Bradley 700-F400A1 Control Relay
Allen-Bradley 700-N200A1 AC Relay with Allen-Bradley 700-NT Relay Timer
Allen-Bradley 700-N200A1 AC Relay 300V Series B 110/120V Coil
Allen-Bradley 700-P400A1 AC Relay 600V 10A Series B
Allen-Bradley 700-BR200A1 Relay with Allen-Bradley 76A86 Coil
Allen-Bradley 700-HB33A1 Relay Series D
Allen-Bradley 700-HB33A1 Relay Series D with CUS12 Relay Socket
Allen-Bradley 700-HB33A1 Relay with 11-Blade Relay Socket
Allen-Bradley 700-HB33A1 Relay Ser. E with 11-Blade Relay Socket
Siemens 3RH1140-2AB00 Contactor Relay 10A w/ 3RH1911-2GA22 Contactor 240V 10A
Siemens 3RN1011-1CB00 Motor Protection Relay 240V 3A
Square D Class 8501 Relay Type X Series A Type X0 40
Allen-Bradley 700-P000A1 AC Relay with 700-N24 Surge Suppressor
Square D 48066 Relay 24V 10A
Potter & Brumfield 27E121 Industrial Relay Socket 300V 10A
Potter & Brumfield Relay Socket 300V 10A
Allen-Bradley 100-C09*10 Contactor 32A w/ Allen-Bradely 193-ED1CB
Allen-Bradley 700-HT22BU120 Time Delay Relay 120V 50/60Hz Ser B
Siemens 3ZX1012-0RH11 Relay 600V 10A w/ Siemens 3RH1911-1HA22 Auxiliary Contact
Siemens 3ZX1012-0RH11 Relay 600V 10A w/ Siemens 3RH1911-2GA22 Auxiliary Contact
Finder 55.34.8.024.0040 Relay 250V 7A with Finder 94.04.0 Relay Socket
Allen-Bradley 700-ZBR520AZ1 Safety Relay Series A
Westinghouse 5264C09H02 Groundgard Relay
MDI 22020A Mercury Relay with RG 2030-6
Dayton 6A854 Solid State Time Delay Relay .01Sec. - 999Min.
Square D 8501-TO-41 Barrier Relay 110/120V 50/60Hz 3W
Cutler-Hammer D26MB D26MPR D26MPL D26MPS Type M Relay
Lumenite Control Technology WFLTV-DM-2012 Liquid Level Control 220V 60Hz 5A 1P
Allen-Bradley 193-EA1CB Overload Relay with 100-MO5N*3 Contactor
emecanique RM3 EA101FG7 Memory Relay 110/130V 50/60Hz
Allen-Bradley 440R-ZBR520AZ1 Safety Relay Series A
Lumenite FLTV-DM2012 Liquid Level Control 220V 60Hz 5A 1P
Nais HG2-DC24V AP6222 Solid State Relay
Schrack 175110 Relay 110V
idec RH4B-U Relay 120V 10A 14Pin
Westinghouse BF30F Control Relay 300V 10A
Potter & Brumfield KAP11AY Relay 120V 5A 8 Pin with Curtis RS8 Relay Socket
Potter & Brumfield KAP-14AY-24 Relay 120V 5A 11 Pin W/ Curtis RS11 Relay Socket
Potter & Brumfield KAP14AY Relay 120V 5A 11 Pin with Curtis RS11 Relay Socket
Allen-Bradley 700-P400A1 Direct Drive AC Relay 600V 10A Series B
Deltrol Controls 105-1914 24 VDC (Housing Cracked)
Potter & Brumfield KRP11DG Relay 110VDC
Square D 8501-KP12 Relay 120V 50/60Hz
