PLC与继电器控制系统的比较

1 控制方式：

继电器的控制是采用硬件接线实现的，是利用继电器机械触点的串联或并联极延时继电器的滞后动作等组合形成控制逻辑，只能完成既定的逻辑控制。

PLC采用存储逻辑，其控制逻辑是以程序方式存储在内存中，要改变控制逻辑，只需改变程序即可，称软接线。

2 控制速度

继电器控制逻辑是依靠触点的机械动作实现控制，工作频率低，毫秒级，机械触点有抖动现象。

PLC是由程序指令控制半导体电路来实现控制，速度快，微秒级，严格同步，无抖动。

3 延时控制

继电器控制系统是靠时间继电器的滞后动作实现延时控制，而时间继电器定时精度不高，受环境影响大，调整时间困难。

PLC用半导体集成电路作定时器，时钟脉冲由晶体振荡器产生，精度高，调整时间方便，不受环境影响。

天然气作为国家的重要能源和工业原料，随着我国国民经济的迅速发展，大中小型企业对它的需求迅速增加；同时由于天然气价格的提高，对天然气流量准确计量的要求越来越迫切。目前市场有各种各样的流量计可用于测量天然气的流量。其中差压式（孔板、喷嘴）流量计因其设计规范简单、牢固、一致性好，不需要实流标定等诸多优点被广泛用作贸易结算流量计。

由于天然气流量计量是非常复杂的，所以使用流量计有诸多不足之处。

首先，流量计的读数需专人手工抄表，就大中型轻烃计量站来说，有30余条天然气管线，共计103个测试点，而且测试点分布面积范围广，并且比较分散，这样就耗费了较多的人力物力。

其次，不管采用哪种流量计，往往需要采用补偿措施来提高测量的准确性。用现代技术实施自动补偿是流体计量领域里的重要课题。所谓流量补偿就是对流量计读数的系统误差修正。流量检测装置的系统误差多数是流体性质及条件（如温度、压力、成分及流量范围等）变化引起的。流量计输出信号与被测流量之间的刻度关系只能依据某一特定工艺状况来确定。如果流量计的实际刻度系数已经发生变化，这时仍按原刻度关系读取流量，显然会产生误差。在一些需要**计量的场合或工况波动范围大而且波动频繁的场合，必须采用补偿措施。流体计量补偿技术就是针对不同流量计，检测不同流体而建立的一种修正方法。由仪表读数准确推算出流体的实际流量，因而流量补偿技术在流体计算中具有重要意义。

由于电动单元仪表的出现，八十年代开始应用电动单元组合仪表的变送器和运算单元建立自动补偿系数，不但实现了自动连续补偿，检测精度也有所提高。它通过变送器同时检测出天然气的静压、差压和温度等参数，并将它们转换为相应的统一的电流信号，按某种运算关系把信号送入计算单元进行运算，输出代表准确流量的信号，经显示仪表显示出流量值和累积流量。单元组合仪表具有通用性强，组成系统比较灵活，自动化程度高，无须人工计算，温度、压力和差压在线检测计算，较符合流量测量理论。其次，目前普遍采用的电容式变送器抗干扰能力强，无机械摩擦磨损，因此系统精度较高。但是在计算方面对标准中各参数的修正问题（如天然气组成成分及其摩尔分量不断变化），从而带来公式引用误差。而且这类补偿装置使用的仪表数量大，补偿装置一次性投资大，而且一套补偿装置只能进行一个流路的流量补偿。这些缺点使它的应用受到限制。

计算机和网络的推广和普及，极大地推动了补偿技术的发展。根据节流式流量测量理论可知：瞬时流量是流体工况（差压、**静压、温度）的函数。由于工况参数一般都是变动的，因此累积流量用工况平均参数计算和用瞬时参数计算累加，其结果是不一样的。以瞬时参数计算并累计流量才符合要求。由于现在的计算机具有极强的存储能力和极**的运算能力，再配套高精度的智能变送器、数据采集卡，就可以完成数据采集处理、数据存储、报表打印和报警等功能，极大的减轻人员的劳动强度。通过计算机联网，就可以实时测控天然气输气管道的数据，实现安全生产，同时使管理层根据现场生产状况进行**决策。运用计算机计算流量的**优点是：全部采用实时参变量（差压、**静压、温度等），因此就不存在对差压、**静压、温度等参数的补偿问题；同时与温度、压力、差压有关的参量（如孔板内径、动力粘度和压缩因子等）也随各相关量变化而变化，从而使补偿装置的成本急剧下降。在实际应用中，当要对天然气流量计算式中某些需经常改变的量（如天然气组成成分及其摩尔分量）进行修改时，可以通过计算机软件来完成。而且还可对含水的天然气进行含水补偿（即扣除水蒸气的体积流量）。因而从理论上讲，运用计算机的实时流量计算系统可构成目前和将来**和**完善的节流式流量计量系统。

二、 系统概述

完成一个天然气计量系统项目涉及大小工作站十余个，每个工作站配有高精度的压力、差压、温度变送器、数据采集板卡进行天然气流量状态的测量、采集，再通过上位机使用MCGS组态软件，从而完成现场数据采集、数据存储、报表打印和报警等功能，便于现场工作人员对生产的监视及控制。通过计算机联网，将各计量站数据传到调度室HP服务器中，使总调值班人员方便的掌握全系统天然气产量，流向及报警等信息，及时的调整天然气走向。调度HP服务器安装了MCGS组态软件www版本，现场工作站通过远程微波，MODEM，串口通讯等通讯方式把现场数据传送到调度服务器上，组态并在局域网上发布，形成基于WEB的上位机管理系统，管理机通过浏览Internet，可以实时的查看数据曲线，报表，历史存盘数据和实时数据等功能。基于WEB的上位机管理系统能够充分发挥服务器和管理机的功能，充分使用管理机的图形能力来绘制动画，并发挥服务器的数值计算能力，进行统计汇总。可以使得整个系统的应用潜力得到充分发挥。

三、工作站简介

  AEG Schneider Electric Modicon Interbus Modul 170 BDM 346 00 170BDM34600

AEG Schneider Electric Modicon Interbus Modul 170 BDM 09600 170BDM09600

AEG Schneider Electric Modicon Interbus Modul 170 BDI 356 00 170BDI35600

AEG SCHNEIDER AUTOMATION NUL 200 MODICON AS-BNUL-200 BLANK UNIT PREWIRING

AEG Schneider Automation Modicon SPS A120 ALU202 ALU 202 - CPU Zentraleinheit

AEG Schneider Automation Modicon DTA200 Grundbaugruppentr?ger

AEG Schneider Automation Modicon DTA 201 Erweiterungsbaugruppentr?ger

AEG Schneider Automation Modicon DNP 205 Systemnetzteil

AEG Schneider Automation Modicon DAP 216N Digitale Ausgangskarte OVP

AEG Schneider Automation Modicon BXT 201 Kabel

AEG SCHNEIDER AUTOMATION MODICON AS-B872-200 B872 ANALOG OUTPUT MODULE

AEG SCHNEIDER AUTOMATION 170 BDO 542 50 MODICON OUTPUT

AEG SCHNEIDER AUTOMATION 170 BDM 342 00 MODICON IN/OUT

AEG SCHNEIDER AUTOMATION 170 BDI 542 50 MODICON INTPUT

AEG SCHNEIDER AUTOMATION 140 DDI 353 00 MODICON INPUT

AEG SCHNEIDER AUTOMATION 140 CPS 111 00 MODICON AC PS

AEG PC-A984-145 MODICON COMP 984 CPU 8K MEM 1XMB MB+ -        - FREE SHIPPING!!!

AEG OUTPUT MODULE MODICON DAP 218/ AS-BDAP-218 24-230 VAC 042 701 664

AEG Modicon, POS 112, P0S 112

AEG Modicon, Metra, Quartech, PCIM, Pacific Scientific Manual MC-MISC-041 [PZD]

AEG Modicon, AS-BDEP-216 Discrete Input 16X24VDC

AEG Modicon ZAE-201 24-Bit Counter UP/D

AEG Modicon W510-008 Now Bus Cable Assembly W510008

AEG Modicon Voltage Output Module Analog AS-B872-200

AEG Modicon UKA 024 6051-042.211848

AEG Modicon UKA 024 211848 Karte Monitor PCB RS232C UKA024 RS 232 C

AEG Modicon TVN DO 113874-1

AEG MODICON TSX MOMENTUM 24VDC INPUT MODULE 170 BDI 346 00

AEG MODICON TSX COMPACT TRUE LOW DISCRETE OUTPUT MODULE DAP 217/AS-BDAP-217

AEG Modicon TSX Compact DEP216/AS-BDEP-?216      

AEG MODICON TSX COMPACT CPU 8K MEMORY W/ MB PLUS PROCESSOR MODULE PC-A984-145

AEG MODICON TSX COMPACT CPU 8K MEMORY W/ MB PLUS PROCESSOR MODULE PC-0984-145

AEG MODICON TSX COMPACT BLANK MODULE NUL 200 / AS-BNUL-200

AEG MODICON TSX COMPACT 8 POINT OUTPUT MODULE AS-BDAP-209

AEG MODICON TSX COMPACT 8 POINT OUTPUT MODULE AS-BDAP-209

AEG MODICON TSX COMPACT 115VAC INPUT MODULE DEP 210

AEG Modicon Terminal Package M# 170 XTS 002 00 ~NIS       SURPLUS~

AEG Modicon Tele Schneider TSX NANO TSXAEN105 NIB

AEG Modicon T.M.E.P. B885 Motion Module Software Manual; Standard Slide [PZD]

AEG Modicon Supply dis. NUL 202,4130-042.244866,Rev.04

AEG Modicon Supply dis. NUL 202,4130-042.244866,Rev.03

AEG Modicon Supply dis. NUL 200,4130-042.244865,Rev.06

AEG Modicon Supply dis. NUL 200,4130-042.244865,Rev.04

AEG Modicon Stecker / Connector, 5039-042.233.854

AEG Modicon SRAM Card

AEG Modicon SPS PLC überwachungsbaugruppe UKA024 UKA 024

AEG Modicon SPS A250 Digital Eingabe DEP112 DEP 112

AEG Modicon SPS A250 Digital Ausgabe DAP112 DAP 112

AEG Modicon SPS A250 Baugruppentr?ger DTA113 DTA 113 RACK

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AEG Modicon SPS A120 ZAE201 ZAE 201 High Speed Counter

AEG Modicon SPS A120 NUL202 NUL 202 Leermodul Baugruppe *OVP* mit Siegel

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AEG Modicon SPS A120 DNP205 DNP 205 Netzteil

AEG Modicon SPS A120 DNO201 DNO 201 Netzteil Versorgungsbaugruppe Power supply

AEG Modicon SPS A120 DEP220 DEP 220 Digitale Eingabe Eingang Baugruppe

AEG Modicon SPS A120 DEP216 DEP 216 Digitale Eingabe Eingang Baugruppe ***OVP***

AEG Modicon SPS A120 DEP216 DEP 216 Digitale Eingabe Eingang Baugruppe

AEG Modicon SPS A120 DEO216 DEO 216 Digitale Eingabe Eingang Baugruppe

AEG Modicon SPS A120 DAP216N DAP 216N Digitale Ausgabe Ausgang Baugruppe

AEG Modicon SPS A120 DAP216 DAP 216 Digitale Ausgabe Ausgang Baugruppe

AEG Modicon SPS A120 DAP212 DAP 212 Digitale Ausgabe Eingabe Baugruppe ***OVP***

AEG Modicon SPS A120 DAP208 DAP 208 Digitale Ausgabe Ausgang Baugruppe ***OVP***

AEG Modicon SPS A120 DAP208 DAP 208 Digitale Ausgabe Ausgang Baugruppe

AEG Modicon SPS A120 DAP204 DAP 204 Digitale Ausgabe Ausgang Baugruppe Output

AEG Modicon SPS A120 DAO216 DAO 216 Digitale Ausgabe Ausgang Baugruppe Output

AEG Modicon Simulator,170 BSM 016 00,170BSM01600

AEG MODICON SIM203 SIM 203 SIMULATOR ANALOG MODULE

AEG Modicon SH04 40E 24 VDC 16 Amp A600 IEC Relay SH0440E SH 04

AEG Modicon SF 8512 6051-042.211115.09

AEG MODICON SELECTABLE N.O./N.C.REED RELAY OUTPUT MODULE AS-B840-108

AEG Modicon Secundary Subrack DTA 201,7628-042.244801,REV.10

AEG Modicon Secondary SubRack 7628-042.244 801 Rev10

AEG Modicon Secondary SubRack 7628-042.244 801 Rev10

AEG Modicon Secondary Subrack 5 Slots_DTA 201 7628-042.244801

AEG Modicon Secondary Rack DTA201

AEG MODICON SCHNIDER AS-B814-108 POWER SELECTABLE N.O./N.C. RELAY OUTPUT

AEG Modicon Schneider TSX Compact DTA201

AEG Modicon Schneider TSX Compact DTA200

AEG Modicon Schneider TSX Compact DEP216 /AS-BDEP-216

AEG Modicon Schneider TSX Compact DAO216 / AS-BDAO-216

AEG Modicon Schneider electric SPS A250 Baugruppentr?ger Rack DTA112 DTA 112

AEG Modicon Schneider electric SPS A120 Analog Simulator SIM203 SIM 203

AEG Modicon Schneider electric Momentum Profibus 170 DNT 110 00 170DNT11000

AEG MODICON SCHNEIDER ELECTRIC GOULD INPUT MODULE 24VDC AS-B827-032 ASB827032

AEG MODICON SCHNEIDER ELECTRIC GOULD INPUT MODULE 24VDC AS-B827-032 ASB827032

AEG MODICON SCHNEIDER DTA 201 7628-042.244 801 SEConDARY SUBRACK

AEG Modicon Schneider DAU 202 AS-BDAU-202 Analog Output Single Module DAU-202

AEG MODICON SCHNEIDER AUTOMATION INC AS-B802-008 115VAC OUTPUT, NNB

AEG MODICON S985-042 MODBUS PLUS NETWORK ADAPTER AM-S985-042

AEG MODICON S985 MODBUS PLUS NETWORK ADAPTER AM-S985-042

AEG MODICON S985 MODBUS PLUS NETWORK ADAPTER

AEG MODICON S975 MODBUS II COMM. PROCESSOR, MODULE: 103, SN: 1124,       - IN BOX

AEG MODICON S908 REMOTE I/O PROCESSOR - MODEL AS-9385-001

AEG MODICON RUMBLE-R-55-01-090 POWER BLOCK MODULE RECTIFIER B475069

AEG Modicon Resolver Cable M# 120-120-25 ~NIB       SURPLUS~

AEG MODICON REMOTE I/O PROCESSOR S908-000 REV B

AEG MODICON REMOTE I/O PROCESSOR MODULE S90B

AEG MODICON REMOTE I/O PROCESSOR MODULE AS-S908-110

AEG Modicon Remote I/O Processor AS-S908-110

AEG MODICON REMOTE I/O PROCESSOR AS-P890-000

AEG MODICON REMOTE I/O PROCESSOR AS-P890-000

AEG Modicon Remote I/O Processor AS-J890-101       

AEG MODICON REMOTE I / O ADAPTER AS-J810-000

AEG Modicon Relay Output Module DAP 208 6728-042.272570 8 Dig 2A 2 A Amp       

AEG MODICON RELAY OUTPUT MODULE DAP 208

AEG MODICON RELAY OUTPUT MODULE AS-B814-108

AEG Modicon Regelsatz Karte 029.069 642 029 069 642

AEG Modicon Regelsatz Karte 029.069 642 029 069 642

AEG Modicon Rack DTA 200 DTA200

AEG MODICON R55-01-090 POWER BLOCK MODULE RECTIFIER B473737

AEG MODICON R55-01-052 POWER BLOCK DIODE MODULE THYRISTOR B474197

AEG Modicon Programmierkabel 3M YDL 052 OVP

AEG Modicon Programmable Controller, PC-E984-385, 385E,       , WARRANTY

AEG Modicon Programmable Controller, PC-0984-680,       , * * * AS-IS * * *

AEG Modicon Programmable Controller, PC-0984-485,       , * * * AS-IS * * *

AEG Modicon Programmable Controller, PC-0984-480, AS-9508-000,       , WARRANTY

AEG MODICON PROGRAMMABLE ConTROLLER PC-0984-485 MISSING HANDLE BROKEN PLASTIC

AEG Modicon Programmable Controller PC-0984-381 WITHOUT KEY

AEG MODICON PROGRAMMABLE ConTROLLER AS-B805-016 BROKEN PLASTIC

AEG Modicon Primary SubRack 7628-042.244 800 Rev10

AEG Modicon Primary Subrack 5 Slots DTA 200/AS-HDTA-200 _ DTA200ASHDTA200

AEG Modicon Primary Subrack 5 Slots DTA 200 7628-042.244800 Rev 10

AEG MODICON POWER SUPPLY P933

AEG MODICON POWER SUPPLY MODULE AS-P810-000

AEG MODICON POWER SUPPLY MODULE AS-P810-000

AEG MODICON POWER SUPPLY MODULE AS-P810-000

AEG MODICON POWER SUPPLY MODULE AS-P120-000

AEG MODICON PLS4-000 CYBERLINE POWER SUPPLY ***XLNT***

AEG MODICON PLC SELECTABLE RELAY OUTPUT MODULE MODEL AS-B814-108

AEG MODICON PLC POWER SUPPLY MODULE MODEL AS-P120-000 (2 AVAILABLE)

AEG Modicon PLC Output Module B804-116 **2 AVAILABLE**

AEG Modicon PLC Motion Module B885-111 **6 AVAILABLE*

AEG MODICON PLC MODULE 140 DDI 353 00 C/N 6 04 01 00 24 VDC IN 4X8 SINK (284-1)

AEG MODICON PLC INPUT MODULE 16 PT 24 VDC MODEL AS-BDEP-216

AEG Modicon PLC Input Module **15 AVAILABLE**

AEG Modicon PLC Data Logic L Assorted documents and Manuals MC-MICRO-COM [PZD]

AEG Modicon PEAB cable with DKV,5014-042.200969,REV.03

AEG Modicon PCB M907-100 Rev A2 PC Board

AEG Modicon PCB M907-100 Rev A2 - M907 Memory

AEG Modicon PCB M907-100 Rev A1 - M907 Memory

AEG MODICON PC-A984-145 P120 and backplane and expansion

AEG Modicon PC-A984-145 CPU 8k MEM w/MB Plus

AEG Modicon PC-A984-145 CPC Module Chipped Battery Door -       

AEG Modicon PC-A984-145 CPC Module 0012262 Rev. K -       

AEG Modicon PC-A984-145 CPC Module -       

AEG Modicon PC-A984-145 Comp 984 CPU Controller Modicon CPU 8k Memory With MB +

AEG Modicon PC-A984-141 CPU 8k memory AS-C951-066 S966-000 1008 (4J)

AEG Modicon PC-0984-145 CPU 8K Memory w/ MB PLUS

AEG MODICON PC-0984-145 COMPACT CPU PC0984145 (2F1)

AEG Modicon PC-0984-120 compact cpu (10A.3)

AEG Modicon PC Board 029.069 608 029069608

AEG Modicon PC Board 029 081 942 029081942

AEG Modicon PC Board 029 069 615 029069615

AEG Modicon PC Board 029 069 608 029069608

AEG Modicon PC Board 029 051 320 029051320

AEG Modicon Panel Mount 029.048 354 029048354

AEG MODICON P930 POWER SUPPLY MODULE REV. G 115/230 VAC

AEG MODICON P120 POWER MODULE MODEL: AS-P120-000

AEG Modicon Output Module, DEP 209,       , WARRANTY

AEG Modicon Output Module, DEP 209, Missing Contacts,       , WARRANTY

AEG Modicon Output Module, # AS-BDAP-216N, DAP 216N, WARRANTY

AEG Modicon Output Module M# AS-B828-016 ~NIB       SURPLUS~

AEG Modicon Output Module DAP 218/ AS-BDAP-218 042701664

AEG MODICON OUTPUT MODULE DAP 208 (MISSING WIRE CONNECTORS)

AEG MODICON OUTPUT MODULE DAP 208

AEG MODICON OUTPUT MODULE AS-B804-016 0009715

AEG MODICON OUTPUT MODULE 24VDC 170 BDO 342 00 *      IN BOX*

AEG MODICON OUTPUT MODULE 115 VAC 8 OUTPUTS MODEL AS-BDAP-209 (3 AVAILABLE)

AEG Modicon NUL 200/AS-BNUL-200 Blank Unit 2 pack

AEG Modicon N.O/N.C Reed Relay Output AS-B840-108

AEG Modicon Momentum Sammelschiene Stecker Leiste 170 XTS 006 01 170TS00601

AEG Modicon Momentum Sammelschiene Stecker Leiste 170 XTS 005 01 170TS00501

AEG Modicon Momentum Sammelschiene Stecker Leiste 170 XTS 004 01 170TS00401

AEG Modicon Momentum Digitale Eingabe Eingang Input 170 ADI 350 00 170ADI35000

AEG Modicon Momentum Digitale Eingabe Eingang Input 170 ADI 340 00 170ADI34000

AEG Modicon Momentum Digitale Eingabe - Ausgabe Input - Output 170 ADM 370 10

AEG Modicon Momentum Digitale Eingabe - Ausgabe Input - Output 170 ADM 350 10

AEG Modicon Momentum Digitale Ausgabe Output 170 ADO 350 00 170ADO35000

AEG Modicon Momentum Digitale Ausgabe Output 170 ADO 340 00 170ADO34000

AEG MODICON MODULE INTERFACE 24VDC 170 BDM 346 00 *      IN BOX*

AEG MODICON MODULE DAP 292 6728-042.278956 *      IN BOX*

AEG MODICON MODULE DAP 210

AEG Modicon Module DAP 210

AEG Modicon Module A120

AEG Modicon Module - DEP 216 w/ Cable - Excellent w/ 30 Day Warrantee !!

AEG Modicon Module - DEP 209 - Excellent w/ 30 Day Warrantee !!

AEG Modicon Module - AS-P120-000 Power Supply - Excellent w/ 30 Day Warrantee !!

AEG Modicon Module - AS-BDEP-210 - Excellent w/ 30 Day Warrantee !!

AEG Modicon Module - AS-BDAP-210 - Excellent w/ 30 Day Warrantee !!

AEG Modicon Modul DNP 205 power supply 24 VDC DNP205

AEG Modicon Modul DNP 205 power supply 24 VDC DNP205

AEG Modicon Modul DNP 205 / AS-BDNP-205 6728 042.244643

AEG Modicon Modul DEP 216 6728-042.244630

AEG Modicon Modul DEP 216

AEG Modicon Modul DAP 216 6728-042.270385

AEG Modicon Modnet 1 BBS1 424 233 854

AEG MODICON MODEL DEP 210 INPUT MODULE 8 POINT 115VAC 6728-042.278925 REV 6

AEG MODICON MODEL 984 MODEL 385E, PC-E984-385

AEG MODICON MODEL 984 MODEL 385E        PC-E984-385

AEG MODICON MODEL 680 PROGRAMMABLE ConTROLLER PC-0984-680 WITH KEY NO BATTERY

AEG MODICON MODEL 485K PROGRAMMABLE ConTROLLER 043504912

AEG MODICON MODEL 385 PROGRAMMABLE ConTROLLER AS-9509-001

AEG MODICON MODBUS PLUS NETWORK PLANNING AND INSTALLATION GUIDE

AEG Modicon Modbus M# 170 BDI 542 50 ~       SURPLUS~

AEG MODICON MIXED I/O MODULE DAP 212/AS-BDAP-212

AEG MODICON MEMORY MODULE M907-100

AEG MODICON MEMORY BOARD M909 REV B MODULE 22

AEG Modicon M909 Memory Module, PCB M909-000, Rev. B1,       , WARRANTY

AEG Modicon M909 Memory Module *FREE SHIPPING*

AEG MODICON M907 MEMORY MODULE PCB M907-000 REV. A

AEG Modicon LS 07.10 110/120 VAC Coil Motor Starter LS0710 LS07.10 L705 10E

AEG Modicon LS 05.10 110/120 VAC Coil Motor Starter LS0510 LS05.10 LS05 10E

AEG MODICON L.C.S.P. OPERATOR KEYPAD ConTROL 63-00241-01

AEG Modicon KOS210 KOS 210 Comm. Modem Modnet 6728.042.27491?1 (1)

AEG Modicon KOS 201 or KOS201 Module

AEG Modicon Isolated Output Module, B246,       , WARRANTY

AEG Modicon Isolated Output Module, AS-B246-501,       , WARRANTY

AEG Modicon Isolated Input Module, AS-B807-132,       , * * * AS-IS * * *

AEG Modicon Interface Module, # ZAE 204, 6728-042.274926, WARRANTY

AEG MODICON INPUT MODULE, DEP 210/AS-BDEP-210, NIB

AEG Modicon Input Module, AS-B805-016, WARRANTY

AEG MODICON INPUT MODULE MISSING COVER DEP 210/AS-BDEP-210

AEG MODICON INPUT MODULE DEP-216

AEG MODICON INPUT MODULE DEP 216 (MISSING WIRE BLOCK)

AEG Modicon Input Module AS-BDEP-210 DEP 210

AEG MODICON INPUT MODULE ASB805016 FOR PARTS AS-B805-016

AEG MODICON INPUT MODULE AS-B351-001 ASB351001 115 VAC

AEG Modicon Input Card, DEP 216, AS-BDEP-216, Missing Connectors,       , WARRANTY

AEG Modicon ICC PLS4 Power Supply 110-108      

AEG MODICON ICC PLS4 POWER SUPPLY 110-0108

AEG Modicon High-/Low- Density Connector Part No. AS-8535-000 NIB

aeg modicon hhp 520vpu19200 handheld plc programming terminal

AEG MODICON GOULD MODEL PLS4 POWER SUPPLY 110-144

AEG Modicon Gould AS-B814-001 Relay Output N.O. Module

AEG Modicon Fast Input Module, AS-B829-116,       , WARRANTY

AEG Modicon Fast Input Module AS-B829-116 ASB829116

AEG Modicon Fast Input Module AS-B829-116 ASB829116

AEG Modicon DTA-202 Extension 7628-042.244868 Rack

AEG Modicon DTA-202 2 Slot Secondary Subrack

AEG MODICON DTA201 SEConDARY RACK NIB

AEG Modicon DTA201 5-Slot Secondary Rack 7628-042.244801 (7417)

AEG MODICON DTA201 (2ea) & 200 Primary subrack 5 slots ( Lot of 3 )

AEG Modicon DTA200 Primary Subrack 5 Slots DTA 200 #9273

AEG Modicon DTA-200 Primary Rack

AEG Modicon DTA-200 Primary Rack

AEG Modicon DTA200 5-Slot Primary Rack 7628-042.244800 (7416)

AEG MODICON DTA 202 COMPACT PRIMARY RACK 7628-042.244868

AEG MODICON DTA 202

AEG Modicon DTA 201 secondary Sub-Rack 5 Slots unbenutzt in OVP

AEG Modicon DTA 201 AS-HDTA-201 Secondary Rack NOS Rev 10.01 FREE S&H

AEG Modicon DTA 201 7628-042.244801 Secondary Rack

AEG Modicon DTA 201 7628-042.244801 DTA201 Secondary Rack

AEG MODICON DTA 201 7628-042.244801

AEG MODICON DTA 201 5-SLOT SEConDARY SUBRACK 7628-042.244 801

AEG Modicon DTA 201 5 Slot Secondary Subrack DTA201

AEG Modicon DTA 201 /628_042.244 801 Secondary Subtrack 5 Slots Industrial

AEG Modicon DTA 200 Primary Subrack 5 Slots 7628-042.244800

AEG Modicon DTA 200 7628-042.244800 DTA200 Primary Rack

AEG Modicon DTA 200 / DTA 201- Lot of 4 - Excellent w/ 30 Day Warrantee !!

AEG Modicon DTA 200

AEG Modicon DNP 105

AEG Modicon Discrete Output Relay DAP 208 / AS-BDAP-208

AEG Modicon Discrete Output Relay AS BDAP 208,042 272 570

AEG Modicon Discrete Output Module, DAP 216, AS-BDAP-216,       , WARRANTY

AEG Modicon Discrete Output Module, DAP 208, AS-BDAP-208,       , * * AS-IS * *

AEG Modicon Discrete Output Module, DAP 208, AS-BDAP-208, Missing Connectors

AEG MODICON DISCRETE OUTPUT MODULE 16 X 24 VDC MODEL DAP216/AS-BDAP-216

AEG MODICON DISCRETE INPUT RELAY DEP210/AS-BDEP-210

AEG Modicon Discrete Input Module, DEP 218, 6728-042.276454,       , WARRANTY

AEG Modicon Discrete Input Module, DEP 216, AS-BDEP-216,       , WARRANTY

AEG Modicon Discrete Input Module, DEP 216, 6728.042.244630,       , WARRANTY

AEG Modicon Discrete Input Module, DEP 210, 6728-042.278925,       , WARRANTY

AEG MODICON DISCRETE INPUT MODULE DEP 217 / AS-BDEP-217

AEG Modicon Discrete Input Module DEP 210 6728-042.278925 8x Dig 115 VAC 6mA

AEG MODICON DISCRETE INPUT MODULE CAT# DEP216/AS-BDEP-216 16X24VDC

AEG Modicon Discrete Input DEP 210 / AS-BDEP-210

AEG MODICON DISCRETE COMBO MODULE DAP-212

AEG MODICON DISCRETE COMBO MODULE DAP 212/AS-BDAP-212

AEG Modicon Discrete Combi - AS-BDAP-220

AEG Modicon Digitale Eingabebaugruppe DEP216

AEG Modicon Digital Eingabemodul 170 BDM 346 00 Schneider SPS CNC Feld bus field

AEG MODICON DEP-220 INPUT MODULE AS-BDEP-220

AEG MODICON DEP2186728-042.276454 INPUT MODULE 16 DIG, 115 VAC, 6 MA

AEG MODICON DEP218/AS-BDEP-218 INPUT MODULE 16POINT 115VAC DEP 218/AS-BDEP-218

AEG Modicon DEP218/AS-BDEP-218 16-Input AC Card

AEG MODICON DEP218 AS-BDEP-218 INPUT MODULE W/O WIRING HARNESS

AEG MODICON DEP216ASBDEP216 **      **

AEG Modicon DEP-216/AS-BDEP-216 Discrete Input

AEG MODICON DEP-216 DISCRETE INPUT MODULE AS-BDEP-216

AEG Modicon DEP216 Digitaleingabe 6728-042.244630 Schneider

AEG Modicon DEP-216 6728-042.244630 16-Dig I 24Vdc

AEG Modicon DEP210 Digitaleingabe 042.278925 AS-BDEP-210

AEG MODICON DEP-210 Card 8 Digital Input 115VAC/6mA, DEP-210

AEG Modicon DEP-209 Input Module 115 VAC

AEG Modicon DEP 220/ AS-BDEP-220 Input Module

AEG Modicon DEP 218/AS-BDEP-218 Discrete Input Module 16pt