PLC自動控制系統(tǒng)可靠性問題進(jìn)行了較深入研究，提出了提高系統(tǒng)可靠性運(yùn)行的方法。實(shí)踐證明這些方法的采用對提高系統(tǒng)的可靠性是行之有效的。

? ? 可編程控制器由于抗干擾能力強(qiáng)，可靠性高，編程簡單，性能價格比高，在工業(yè)控制領(lǐng)域得到越來越廣泛應(yīng)用。

? ? 工業(yè)年月機(jī)作為中央控制單元，配有組態(tài)軟件，選用大屏幕實(shí)時監(jiān)視界面，實(shí)現(xiàn)各控制點(diǎn)的動態(tài)顯示、數(shù)據(jù)修改、故障診斷、自動報警，還可顯示查詢歷史事件記錄，系統(tǒng)各主要部件累計運(yùn)行時間，各裝置工藝流程圖，各裝置結(jié)構(gòu)圖等。中央控制單元和下位機(jī)PLC之間采用串行通訊方式進(jìn)行數(shù)據(jù)交換，通常距離在1000m以內(nèi)選用485雙絞線通訊方式，較常距離可選用光纖通訊，更長距離也可選用無線通訊方式。下位機(jī)選用PLC控制，根據(jù)控制對象的多少，控制對象的范圍，可選用一臺或多臺PLC進(jìn)行控制，PLC之間數(shù)據(jù)交換是利用內(nèi)部鏈接寄存器，實(shí)現(xiàn)數(shù)據(jù)交換和共享。由于PLC對現(xiàn)場進(jìn)實(shí)時監(jiān)控具有很高的可靠性，且編程簡單、靈活，因此越來越受到人們重視。

? ? 控制系統(tǒng)可靠性降低的主要原因

? ? 雖然工業(yè)控制機(jī)和可編程控制器本身都具有很高的可靠性，但如果輸入給PLC的開關(guān)量信號出現(xiàn)錯誤，模擬量信號出現(xiàn)較大偏差，PLC輸出口控制的執(zhí)行機(jī)構(gòu)沒有按要求動作，這些都可能使控制過程出錯，造成無法挽回的經(jīng)濟(jì)損失。

? ? 影響現(xiàn)場輸入給PLC信號出錯的主要原因有：

? ? 造成傳輸信號線短路或斷路（由于機(jī)械拉扯，線路自身老化，特別是鼠害），當(dāng)傳輸信號線出故障時，現(xiàn)場信號無法傳送給PLC，造成控制出錯；

? ? 機(jī)械觸點(diǎn)抖動，現(xiàn)場觸點(diǎn)雖然只閉合一次，PLC卻認(rèn)為閉合了多次，雖然硬件加了濾波電路，軟件增加微分指令，但由于PLC掃描周期太短，仍可能在計數(shù)、累加、移位等指令中出錯，出現(xiàn)錯誤控制結(jié)果；

? ? 現(xiàn)場變送器，機(jī)械開關(guān)自身出故障，如觸點(diǎn)接觸不良，變送器反映現(xiàn)場非電量偏差較大或不能正常工作等，這些故障同樣會使控制系統(tǒng)不能正常工作。

? ? 影響執(zhí)行機(jī)構(gòu)出錯的主要原因有：

? ? 控制負(fù)載的接觸不能可靠動作，雖然PLC發(fā)出了動作指令，但執(zhí)行機(jī)構(gòu)并沒按要求動作；

? ? 控制變頻器起動，由于變頻器自身故障，變頻器所帶電機(jī)并沒按要求工作；

? ? 各種電動閥、電磁閥該開的沒能打開，該關(guān)的沒能關(guān)到位，由于執(zhí)行機(jī)構(gòu)沒能按PLC的控制要求動作，使系統(tǒng)無法正常工作，降低了系統(tǒng)可靠性。要提高整個控制系統(tǒng)的可靠性，必須提高輸入信號的可靠性和執(zhí)行機(jī)構(gòu)動作的準(zhǔn)確性，否則PLC應(yīng)能及時發(fā)現(xiàn)問題，用聲光等報警辦法提示給操作人員，盡快排除故障，讓系統(tǒng)安全、可靠、正確地工作。

? ? 設(shè)計完善的故障報警系統(tǒng)

? ? 在自動控制系統(tǒng)的設(shè)計中我們設(shè)計了3級故障顯示報警系統(tǒng)，1級設(shè)置在控制現(xiàn)場各控制柜面板，用指示燈指示設(shè)備正常運(yùn)行和故障情況，當(dāng)設(shè)備正常運(yùn)行時對應(yīng)指示燈亮，當(dāng)該設(shè)備運(yùn)行有故障時指示燈以1Hz的頻率閃爍。為防止指示燈燈泡損壞不能正確反映設(shè)備工作情況，專門設(shè)置了故障復(fù)位/燈測試按鈕，系統(tǒng)運(yùn)行任何時間持續(xù)按該按鈕3s，所有指示燈應(yīng)全部點(diǎn)亮，如果這時有指示等不亮說明該指示燈已壞，應(yīng)立即更換，改按鈕復(fù)位后指示燈仍按原工作狀態(tài)顯示設(shè)備工作狀態(tài)。2級故障顯示設(shè)置在中心控制室大屏幕監(jiān)視器上，當(dāng)設(shè)備出現(xiàn)故障時，有文字顯示故障類型，工藝流程圖上對應(yīng)的設(shè)備閃爍，歷史事件表中將記錄該故障。3級故障顯示設(shè)置在中心控制室信號箱內(nèi)，當(dāng)設(shè)備出現(xiàn)故障時，信號箱將用聲、光報警方式提示工作人員，及時處理故障。在處理故障時，又將故障進(jìn)行分類，有些故障是要求系統(tǒng)停止運(yùn)行的，但有些故障對系統(tǒng)工作影響不大，系統(tǒng)可帶故障運(yùn)行，故障可在運(yùn)行中排除，這樣就大大減少整個系統(tǒng)停止運(yùn)行時間，提高系統(tǒng)可靠性運(yùn)行水平。

? ? 輸入信號可靠性研究

? ? 要提高現(xiàn)場輸入給PLC信號的可靠性，首先要選擇可靠性較高的變送器和各種開關(guān)，防止各種原因引起傳送信號線短路、斷路或接觸不良。其次在程序設(shè)計時增加數(shù)字濾波程序，增加輸入信號的可信性。

? ? 在現(xiàn)場輸入觸點(diǎn)后加一定時器，定時時間根據(jù)觸點(diǎn)抖動情況和系統(tǒng)要的響應(yīng)速度確定，一般在幾十ms，這樣可保證觸點(diǎn)確實(shí)穩(wěn)定閉合后，才有其它響應(yīng)。模擬信號濾波可采用圖2b程序設(shè)計方法，對現(xiàn)場模擬信號連續(xù)采樣3次，采樣間隔由A/D轉(zhuǎn)換速度和該模擬信號變化速率決定。3次采樣數(shù)據(jù)分別存放在數(shù)據(jù)寄存器DT10、DT11、DT12中，當(dāng)最后1次采樣結(jié)束后利用數(shù)據(jù)比較、數(shù)據(jù)交換指令、數(shù)據(jù)段比較指令去掉最大和最小值，保留中間值作為本次采樣結(jié)果存放在數(shù)據(jù)寄存器DT0中。

? ? 提高讀入PLC現(xiàn)場信號的可靠性還可利用控制系統(tǒng)自身特點(diǎn)，利用信號之間關(guān)系來判斷信號的可信程度。如進(jìn)行液位控制，由于儲罐的尺寸是已知的，進(jìn)液或出液的閥門開度和壓力是已知的，在一定時間里罐內(nèi)液體變化高度大約在什么范圍是知道的，如果這時液位計送給PLC的數(shù)據(jù)和估算液位高度相差較大，判斷可能是液位計故障，通過故障報警系統(tǒng)通知操作人員檢查該液位計。又如各儲罐有上下液位極限保護(hù)，當(dāng)開關(guān)動作時發(fā)出信號給PLC，這個信號是否真實(shí)可靠，在程序設(shè)計時我們將這信號和該罐液位計信號對比，如果液位計讀數(shù)也在極限位置，說明該信號是真實(shí)的；如果液位計讀數(shù)不在極限位置，判斷可能是液位極限開關(guān)故障或傳送信號線路故障，同樣通過報警系統(tǒng)通知操作人員處理該故障。由于在程序設(shè)計時采用了上述方法，大大提高了輸入信號的可靠。

? ? 執(zhí)行機(jī)構(gòu)可靠性研究

? ? 當(dāng)現(xiàn)場的信號準(zhǔn)確地輸入給PLC后，PLC執(zhí)行程序，將結(jié)果通過執(zhí)行機(jī)構(gòu)對現(xiàn)場裝置進(jìn)行調(diào)節(jié)、控制。怎樣保證執(zhí)行機(jī)構(gòu)按控制要求工作，當(dāng)執(zhí)行機(jī)構(gòu)沒有按要求工作，怎樣發(fā)現(xiàn)故障？我們采取以下措施：當(dāng)負(fù)載由接觸器控制時，啟動或停止這類負(fù)載轉(zhuǎn)為對接觸器線圈控制，啟動時接觸器是否可靠吸合，停止時接觸器是否可靠釋放，這是我們關(guān)心的。

? ? X0為接觸器動作條件，Y0為控制線圈輸出，X1為引回到PLC輸入端的接觸器輔助常開觸點(diǎn)，定時器定時時間大于接觸器動作時間。R0為設(shè)定的故障位，R0為ON表示有故障，做報警處理；R0為OFF表示無故障。故障具有記憶功能，由故障復(fù)位按鈕清除。

? ? 當(dāng)開啟或關(guān)閉電動閥門時，根據(jù)閥門開啟、關(guān)閉時間不同，設(shè)置延時時間，經(jīng)過延時檢測開到位或關(guān)到位信號，如果這些信號不能按時準(zhǔn)確返回給PLC，說明閥可能有故障，做閥故障報警處理。程序設(shè)計如圖3b所示。X2為閥門開啟條件，Y1為控制閥動作輸出，定時器定時時間大于閥開啟到位時間，X3為閥到位返回信號，R1為閥故障位。

? ? 我們在勝利油田勝利采油廠勝砣注聚站自動控制系統(tǒng)設(shè)計中采用了以上方法，經(jīng)過近2年的運(yùn)行證明這些方法的采用對提高系統(tǒng)可靠性運(yùn)行是行之有效的。

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GE PC Board 269PLUS-120N120 Motor Relay PC Card (3249)
Ref: GE PC Board 269PLUS-120N120 Motor Relay PC Card (3249)
GE Multilin 735 Feeder Protection Relay Unit
Ref: GE Multilin 735 Feeder Protection Relay Unit
NEW GE FANUC IC655MDL581A OUTPUT MODULE RELAY 32PT
Ref: NEW GE FANUC IC655MDL581A OUTPUT MODULE RELAY 32PT
GE Multilin HAA Auxiliary Annunciator Relay HAA13B1A DC
Ref: GE Multilin HAA Auxiliary Annunciator Relay HAA13B1A DC
GE Drive Terminal Relay Card 531X171TMAAFG2 NIB
Ref: GE Drive Terminal Relay Card 531X171TMAAFG2 NIB
GE 369-HI-R-M-F-0 MULTILIN MOTOR MANAGEMENT RELAY
Ref: GE 369-HI-R-M-F-0 MULTILIN MOTOR MANAGEMENT RELAY
NEW GE MULTILIN VOLTAGE MANAGEMENT RELAY 2 PACK MIVII
Ref: NEW GE MULTILIN VOLTAGE MANAGEMENT RELAY 2 PACK MIVII
GE LIGHTING CONTROLS RINTER2424 24 RELAY PANEL INTERIOR
Ref: GE LIGHTING CONTROLS RINTER2424 24 RELAY PANEL INTERIOR
NEW GE ELECTRIC MULTILIN MOTOR PROTECTION RELAY 122 NR
Ref: NEW GE ELECTRIC MULTILIN MOTOR PROTECTION RELAY 122 NR
GE 239 Motor protection Relay “NIB”
Ref: GE 239 Motor protection Relay “NIB”
GE General Electric 750 Feeder Management Relay 750-P5
Ref: GE General Electric 750 Feeder Management Relay 750-P5
GE Fanuc IC660BBR100N GENIUS NC RELAY BLOCK 115/230VAC
Ref: GE Fanuc IC660BBR100N GENIUS NC RELAY BLOCK 115/230VAC
GE Differential Relay Model 12STD15C3A – New Old Stock
Ref: GE Differential Relay Model 12STD15C3A – New Old Stock
NEW GE IC3600 RELAY DRIVER IC3600LRDH1B1D IC3600LRDH1
Ref: NEW GE IC3600 RELAY DRIVER IC3600LRDH1B1D IC3600LRDH1
GE Drive Relay Board 193X562ACG06 NIB
Ref: GE Drive Relay Board 193X562ACG06 NIB
GE Restraint Relay IFCV-TOC IFCV51AD1A NIB
Ref: GE Restraint Relay IFCV-TOC IFCV51AD1A NIB
GE Solid State Ground Break Relay, TGMR1D, NIB
Ref: GE Solid State Ground Break Relay, TGMR1D, NIB
GE TIME OVERCURRENT RELAY 12SFC151D1A
Ref: GE TIME OVERCURRENT RELAY 12SFC151D1A
GE 12CFV12A4A NEW POLYPHASE UNDERVOLTAGE RELAY
Ref: GE 12CFV12A4A NEW POLYPHASE UNDERVOLTAGE RELAY
GE RELAY CIRCUIT BOARD 193X703ADG04
Ref: GE RELAY CIRCUIT BOARD 193X703ADG04
GE Undervoltage Relay Type NGV 12NGV15A22 208V
Ref: GE Undervoltage Relay Type NGV 12NGV15A22 208V
GE IJS 52D1A Synchronism Check Relay IJS52D1A
Ref: GE IJS 52D1A Synchronism Check Relay IJS52D1A
$296.00
GE Transformer Overcurrent Relay TOC7102B201C10 MSI129
Ref: GE Transformer Overcurrent Relay TOC7102B201C10 MSI129
GE 12IFC53B1A Inverse Time Overcurrent Relay IFC53B1A
Ref: GE 12IFC53B1A Inverse Time Overcurrent Relay IFC53B1A
GE 12IFC53A2A Inverse Time Overcurrent Relay IFC53A2A
Ref: GE 12IFC53A2A Inverse Time Overcurrent Relay IFC53A2A
NIB GE STATIC BREAKER BACK-UP RELAY 3661034CFR SBC 10 A
Ref: NIB GE STATIC BREAKER BACK-UP RELAY 3661034CFR SBC 10 A
12XLA12A1 , GE RELAY TEST PLUG
Ref: 12XLA12A1 , GE RELAY TEST PLUG
GE- NIB Photoelectric Relay Model #3S7505KP501A1
Ref: GE- NIB Photoelectric Relay Model #3S7505KP501A1
NEW General Electric GE Relay Test Plug 12XLA12A1 NR!
Ref: NEW General Electric GE Relay Test Plug 12XLA12A1 NR!
GE INFOGRAPHICS RRM16-E1L 16 OUTPUT RELAYS NEW IN BOX
Ref: GE INFOGRAPHICS RRM16-E1L 16 OUTPUT RELAYS NEW IN BOX
GE GENERAL ELECTRIC 12IAC66C56A TIME OVERCURRENT RELAY
Ref: GE GENERAL ELECTRIC 12IAC66C56A TIME OVERCURRENT RELAY
(10) GE Overload Relays
Ref: (10) GE Overload Relays
GE IAC 53A803A Time-Overcurren?t Relay NEW NIB
Ref: GE IAC 53A803A Time-Overcurren?t Relay NEW NIB
GE Auxiliary Relay HAA 15H2F NIB
Ref: GE Auxiliary Relay HAA 15H2F NIB
GE IAC 51B808A Time-Overcurren?t Relay NEW NIB
Ref: GE IAC 51B808A Time-Overcurren?t Relay NEW NIB
GE 12HFC21B1A Instantaneous Overcurrent Relay HFC21B1A
Ref: GE 12HFC21B1A Instantaneous Overcurrent Relay HFC21B1A
GE General Electric DC Contactor Relay 150 DC Amps 600V
Ref: GE General Electric DC Contactor Relay 150 DC Amps 600V
NEW GE AUXILIARY RELAY 12HFA54E187F
Ref: NEW GE AUXILIARY RELAY 12HFA54E187F
GE INFOGRAPHICS RIM16-E1L 16 INPUT RELAYS NEW IN BOX
Ref: GE INFOGRAPHICS RIM16-E1L 16 INPUT RELAYS NEW IN BOX
GE FANUC OUTPUT RELAY PLUG-IN MODULE MODEL IC610MDL182A
Ref: GE FANUC OUTPUT RELAY PLUG-IN MODULE MODEL IC610MDL182A
NEW GE AUXILIARY RELAY 12HFA51A42H
Ref: NEW GE AUXILIARY RELAY 12HFA51A42H
GE CASI RUSCO 110078001 MICRO/5 16DOR 16 RELAYS 16DO
Ref: GE CASI RUSCO 110078001 MICRO/5 16DOR 16 RELAYS 16DO
GE Fanuc IC-697-MDL-653/?IC697MDL653 Input Relay
Ref: GE Fanuc IC-697-MDL-653/?IC697MDL653 Input Relay
GE Transformer Overcurrent Relay TOC7102B201C00 MSI129
Ref: GE Transformer Overcurrent Relay TOC7102B201C00 MSI129
NEW GE Fanuc 16 Circuit Relay Output Module IC610MDL182
Ref: NEW GE Fanuc 16 Circuit Relay Output Module IC610MDL182
GE CR2810A14AG102 10A 600V 8 N.O. P Machine Tool Relay
Ref: GE CR2810A14AG102 10A 600V 8 N.O. P Machine Tool Relay
GE RTN3E Manual Reset Overload Relay CK75C-CK08C NEW
Ref: GE RTN3E Manual Reset Overload Relay CK75C-CK08C NEW
GE Contactor CL03-45 CL45A Reversing relay 480v NEW
Ref: GE Contactor CL03-45 CL45A Reversing relay 480v NEW
GE FANUC IC200MDD845C MIXED OUT RELAY 8PT IN 16 PT NEW
Ref: GE FANUC IC200MDD845C MIXED OUT RELAY 8PT IN 16 PT NEW
GE Auxiliary Relay Model 12HFA51A42H Type HFA
Ref: GE Auxiliary Relay Model 12HFA51A42H Type HFA
NEW GE 12HFA51A49F, HFA MULTICONTACT AUXILIARY RELAY
Ref: NEW GE 12HFA51A49F, HFA MULTICONTACT AUXILIARY RELAY
NEW GE Relay 12HFA151A5F Type HFA 24 Volts DC
Ref: NEW GE Relay 12HFA151A5F Type HFA 24 Volts DC
CR120K60041AA GE RELAY, HIGH FIDELITY
Ref: CR120K60041AA GE RELAY, HIGH FIDELITY
SQUARE D AC RELAY OPERATED TIMER # 8501-G040GE
Ref: SQUARE D AC RELAY OPERATED TIMER # 8501-G040GE
GE CR324FXMS SIZE 3/4 SOLID STATE OVERLOAD RELAY NEW
Ref: GE CR324FXMS SIZE 3/4 SOLID STATE OVERLOAD RELAY NEW
GE Fanuc IC610MDL182A Relay Output Module
Ref: GE Fanuc IC610MDL182A Relay Output Module
GE Fanuc IC610MDL180A Relay Output Module
Ref: GE Fanuc IC610MDL180A Relay Output Module
GE Fanuc IC610MDL104A DC Input/Relay Output Module
Ref: GE Fanuc IC610MDL104A DC Input/Relay Output Module
GE GENERAL ELECTRIC RELAY TESTER MODEL 12LA12A1 “NEW”
Ref: GE GENERAL ELECTRIC RELAY TESTER MODEL 12LA12A1 “NEW”
GE TIME 12IAC51B808A OVERCURRENT RELAY 2-16A, 20-160A
Ref: GE TIME 12IAC51B808A OVERCURRENT RELAY 2-16A, 20-160A
GE SIZE 3/4 SOLID STATE OVERLOAD RELAY NEW CR324FXLS
Ref: GE SIZE 3/4 SOLID STATE OVERLOAD RELAY NEW CR324FXLS
NEW GE TIME OVERCURRENT RELAY 12IAC53M101A
Ref: NEW GE TIME OVERCURRENT RELAY 12IAC53M101A
NEW GE INSTANTANEOUS CURRENT RELAY 12PJC11AV1A
Ref: NEW GE INSTANTANEOUS CURRENT RELAY 12PJC11AV1A
NEW GE TIME OVERCURRENT RELAY 12IAC66B1A
Ref: NEW GE TIME OVERCURRENT RELAY 12IAC66B1A
GE MULTILIN 369 MOTOR PROTECTION MANAGEMENT RELAY
Ref: GE MULTILIN 369 MOTOR PROTECTION MANAGEMENT RELAY
GE INFOGRAPHICS RIM16-E00 16 INPUT RELAYS NEW IN BOX
Ref: GE INFOGRAPHICS RIM16-E00 16 INPUT RELAYS NEW IN BOX
VINTAGE- GE PYROMETER 0-2000F TYPE 195 METER RELAY NEW
Ref: VINTAGE- GE PYROMETER 0-2000F TYPE 195 METER RELAY NEW
GE Fanuc Series One relay output IC610MDL182A NEW
Ref: GE Fanuc Series One relay output IC610MDL182A NEW
GE PLC I/O Module DC In/ 8-Relay Out IC610MDL104A
Ref: GE PLC I/O Module DC In/ 8-Relay Out IC610MDL104A
GE GENERAL ELECTRIC HFA51 RELAY HFA51A42H HFA NEW
Ref: GE GENERAL ELECTRIC HFA51 RELAY HFA51A42H HFA NEW
$199.95
GE CR324E310F OVERLOAD RELAY 90A 3 POLE 600VAC 250VDC
Ref: GE CR324E310F OVERLOAD RELAY 90A 3 POLE 600VAC 250VDC
NEW GE Relay Model 12HFA51A49H HFA 115V GEF-2757E
Ref: NEW GE Relay Model 12HFA51A49H HFA 115V GEF-2757E
GE/MULTILIN 130 MOTOR PROTECTION RELAY *XLNT*
Ref: GE/MULTILIN 130 MOTOR PROTECTION RELAY *XLNT*
GE 531X137TRGACG1 TB RELAY BOARD ***XLNT***
Ref: GE 531X137TRGACG1 TB RELAY BOARD ***XLNT***
GE IC300DQM902B IC 300 DQM 902 B 20 Point Relay Output
Ref: GE IC300DQM902B IC 300 DQM 902 B 20 Point Relay Output
GE Fanuc 90/30 IC693MDL940E Relay N.O. Output Module
Ref: GE Fanuc 90/30 IC693MDL940E Relay N.O. Output Module
Brand new GE oven ERC/LWR oven relay part # WB27T10971
Ref: Brand new GE oven ERC/LWR oven relay part # WB27T10971
SQUARE D AC RELAY OPERATED TIMER G0-40-GE CLASS 8501
Ref: SQUARE D AC RELAY OPERATED TIMER G0-40-GE CLASS 8501
NIB GE PILOT WIRE AUX RELAY 12NAA99AM1A 125 VDC
Ref: NIB GE PILOT WIRE AUX RELAY 12NAA99AM1A 125 VDC
New Sealed GE FANUC IC693MDL930G 4A 8PT OUTPUT RELAY
Ref: New Sealed GE FANUC IC693MDL930G 4A 8PT OUTPUT RELAY
NIB GE AUXILIARY RELAY 12HFA151A1F TYPE HFA 250 V
Ref: NIB GE AUXILIARY RELAY 12HFA151A1F TYPE HFA 250 V
GE CR120BL060 600V Latched Relay CR120-L-060 NNB
Ref: GE CR120BL060 600V Latched Relay CR120-L-060 NNB
GE General Electric Relay Model 12H6A11B2 125 VDC
Ref: GE General Electric Relay Model 12H6A11B2 125 VDC
GE Fanuc IDEC IZBARL IBRC410 IBRC 410 RELAY BARRIER
Ref: GE Fanuc IDEC IZBARL IBRC410 IBRC 410 RELAY BARRIER
GE 12HFA51A42/HFA-?51A42 AUXILIARY RELAY ***NIB***
Ref: GE 12HFA51A42/HFA-?51A42 AUXILIARY RELAY ***NIB***
GE PNEUMATIC TIME DELAY RELAY CR2820B110AA2 115V NEW
Ref: GE PNEUMATIC TIME DELAY RELAY CR2820B110AA2 115V NEW
GE CR324FXMS SIZE 3/4 SOLID STATE OVERLOAD RELAY NEW
Ref: GE CR324FXMS SIZE 3/4 SOLID STATE OVERLOAD RELAY NEW
NEW – Electromate Electrical Relay Box w/3 GE Relays
Ref: NEW – Electromate Electrical Relay Box w/3 GE Relays
GE 3S7511RS575A6 Resistive sensitive relay NEW NIB
Ref: GE 3S7511RS575A6 Resistive sensitive relay NEW NIB
GE CR2820B420AA42 Pneumatic Time Delay Relay NEW NIB
Ref: GE CR2820B420AA42 Pneumatic Time Delay Relay NEW NIB
New GE Fanuc IC693MDL930F Output Relay Module *Sealed*
Ref: New GE Fanuc IC693MDL930F Output Relay Module *Sealed*
GE CR120B01502 Industrial Relay, NOS
Ref: GE CR120B01502 Industrial Relay, NOS
GE FANUC IC697MDL940 OUTPUT RELAY MODULE 120VAC 16PT
Ref: GE FANUC IC697MDL940 OUTPUT RELAY MODULE 120VAC 16PT
GE CR2820B-110AA2 Pneumatic Time Delay Relay New CR2820
Ref: GE CR2820B-110AA2 Pneumatic Time Delay Relay New CR2820
GE FANUC IC693MDL940H OUTPUT MODULE RELAY 2AMP 16POINT
Ref: GE FANUC IC693MDL940H OUTPUT MODULE RELAY 2AMP 16POINT
GE 12HGA17C52/HGA1?7C52 AUXILIARY RELAY ***NIB***
Ref: GE 12HGA17C52/HGA1?7C52 AUXILIARY RELAY ***NIB***
NIB GE RELAY HFA 12HFA51A49F
Ref: NIB GE RELAY HFA 12HFA51A49F
GE Time Overcurrent Relay Type IAC Model 12IAC51B4A New
Ref: GE Time Overcurrent Relay Type IAC Model 12IAC51B4A New
GE FANUC IC693MDL940E OUTPUT MODULE RELAY 2A 16PT
Ref: GE FANUC IC693MDL940E OUTPUT MODULE RELAY 2A 16PT
GE Fanuc Series 90 Micro IC693UDR005CP1 24VDC In Relay
Ref: GE Fanuc Series 90 Micro IC693UDR005CP1 24VDC In Relay
GE CR324HXTS SIZE 6 SOLID STATE OVERLOAD RELAY NEW
Ref: GE CR324HXTS SIZE 6 SOLID STATE OVERLOAD RELAY NEW
UNUSED GE VOLTAGE RELAY 12IAV51A1AF
Ref: UNUSED GE VOLTAGE RELAY 12IAV51A1AF
GE 115 V 60 AMP AUXILIARY RELAY MODEL 12HGA11J70
Ref: GE 115 V 60 AMP AUXILIARY RELAY MODEL 12HGA11J70
GE General Electric RTN3B Overload Relay 55-80a amp NEW
Ref: GE General Electric RTN3B Overload Relay 55-80a amp NEW
GE General Electric RTN3B Overload Relay 55-80a amp NEW
Ref: GE General Electric RTN3B Overload Relay 55-80a amp NEW
**NIB** GE Electronic Relay RMM2AR
Ref: **NIB** GE Electronic Relay RMM2AR
RRDC12 GE RELAY DRIVER BOARD
Ref: RRDC12 GE RELAY DRIVER BOARD
GE IC610MDL180A Relay Output Module 8-Channel
Ref: GE IC610MDL180A Relay Output Module 8-Channel
NEW GE PHASE SEQUENCE & UNDERVOLTAGE RELAY 12ICR54A1A
Ref: NEW GE PHASE SEQUENCE & UNDERVOLTAGE RELAY 12ICR54A1A
(5) NEW GE Federal Pacif Relay Breaker 12HFA51A49H $149
Ref: (5) NEW GE Federal Pacif Relay Breaker 12HFA51A49H $149
10 NEW GE OVERLOAD RELAY CR4G2WYY2+CR4XG?6 23-30 Free S.
Ref: 10 NEW GE OVERLOAD RELAY CR4G2WYY2+CR4XG?6 23-30 Free S.
GE 90-30 IC693MDL940H OUTPUT PLC MODULE RELAY 2A 16pt
Ref: GE 90-30 IC693MDL940H OUTPUT PLC MODULE RELAY 2A 16pt
GE Smart Relay Block SRBA120A10A 10A 120V NEW IN BOX
Ref: GE Smart Relay Block SRBA120A10A 10A 120V NEW IN BOX
GE Overload Relay CR324C310A Manual Reset Only
Ref: GE Overload Relay CR324C310A Manual Reset Only
GE CR122A04702AA Pneumatic Time Delay Relay NEW
Ref: GE CR122A04702AA Pneumatic Time Delay Relay NEW
GE CR120A02202AA 300V Relay NEW
Ref: GE CR120A02202AA 300V Relay NEW
General Electric GE HFA relay 12HFA51A42F
Ref: General Electric GE HFA relay 12HFA51A42F
GE FANUC IC693MDL940C OUTPUT RELAY MODULE ****XLNT****
Ref: GE FANUC IC693MDL940C OUTPUT RELAY MODULE ****XLNT****
$149.00
NIB GE AUXILIARY RELAY 12HGA111A1F HGA 250 V
Ref: NIB GE AUXILIARY RELAY 12HGA111A1F HGA 250 V
GE FANUC IC693MDL940F OUTPUT RELAY MODULE ****XLNT****
Ref: GE FANUC IC693MDL940F OUTPUT RELAY MODULE ****XLNT****
GE 10 PIN RELAY CR245C111A
Ref: GE 10 PIN RELAY CR245C111A
New GE Automation Panel Relay Driver Card, RRDC1
Ref: New GE Automation Panel Relay Driver Card, RRDC1
GE CR124Y0A2829A RELAY 5A 600VAC CR124Y-0A2829A NEW
Ref: GE CR124Y0A2829A RELAY 5A 600VAC CR124Y-0A2829A NEW
GE General Electric GE IAC 51B806A Industrial Relay
Ref: GE General Electric GE IAC 51B806A Industrial Relay
NEW GE Fanuc 8 Circuit Relay Output Module IC610MDL180A
Ref: NEW GE Fanuc 8 Circuit Relay Output Module IC610MDL180A
GE CR120BD03241 Industrial Relay 125VDC Coil 10A 600V
Ref: GE CR120BD03241 Industrial Relay 125VDC Coil 10A 600V
GE FANUC IC693MDL940G OUTPUT RELAY MODULE ****XLNT****
Ref: GE FANUC IC693MDL940G OUTPUT RELAY MODULE ****XLNT****
GE Fanuc PLC Relay Output Module IC693MDL940G
Ref: GE Fanuc PLC Relay Output Module IC693MDL940G
BF914K GE FANUC PLC Card Relay Out Module
Ref: BF914K GE FANUC PLC Card Relay Out Module
Fanuc (GE) #IC610-MDL180A Relay Output 8 Cir (U) 5/5/43
Ref: Fanuc (GE) #IC610-MDL180A Relay Output 8 Cir (U) 5/5/43
GE CR324DXHS SIZE 2 SOLID STATE OVERLOAD RELAY NEW
Ref: GE CR324DXHS SIZE 2 SOLID STATE OVERLOAD RELAY NEW
GE CR324DXJS SIZE 2 SOLID STATE OVERLOAD RELAY NEW
Ref: GE CR324DXJS SIZE 2 SOLID STATE OVERLOAD RELAY NEW
GE FANUC MIXED I/O MODULE 24 VDC, IN=RELAY OUT=8 PT NEW
Ref: GE FANUC MIXED I/O MODULE 24 VDC, IN=RELAY OUT=8 PT NEW
GE FANUC IC610MDL182A Relay Output Model 16 ! NEW !
Ref: GE FANUC IC610MDL182A Relay Output Model 16 ! NEW !
GE FANUC OUTPUT MODULE RELAY 16-POINT IC693MDL940C
Ref: GE FANUC OUTPUT MODULE RELAY 16-POINT IC693MDL940C
GE Fanuc IC693MDL940C Output Relay Module
Ref: GE Fanuc IC693MDL940C Output Relay Module
GE Power Board Relay Power Supply WB23T10023 NEW
Ref: GE Power Board Relay Power Supply WB23T10023 NEW
GE IC610MDL180A 24VDC RELAY OUTPUT MDL/8 I/O MODULE
Ref: GE IC610MDL180A 24VDC RELAY OUTPUT MDL/8 I/O MODULE
GE FANUC IC693MDL940A OUTPUT RELAY MODULE ****XLNT****
Ref: GE FANUC IC693MDL940A OUTPUT RELAY MODULE ****XLNT****
NEW GE AUXILIARY RELAY 12HEA61ARU226X2 125V
Ref: NEW GE AUXILIARY RELAY 12HEA61ARU226X2 125V
GE FANUC IC660TBR101K TERMINAL ASSEMBLY RELAY ***RFB***
Ref: GE FANUC IC660TBR101K TERMINAL ASSEMBLY RELAY ***RFB***
GE Range Power Relay Board WB23T10024
Ref: GE Range Power Relay Board WB23T10024
GE General Electric Relay CR120A04002AA NEW
Ref: GE General Electric Relay CR120A04002AA NEW
GE CONTROL NEMA 4 TIME DELAY UNDERVOLTAGE RELAY NIB
Ref: GE CONTROL NEMA 4 TIME DELAY UNDERVOLTAGE RELAY NIB
GE 4PDT 2.0 AMP 26.5V DC MIL SPEC SEALED RELAY
Ref: GE 4PDT 2.0 AMP 26.5V DC MIL SPEC SEALED RELAY
New GE Fanuc IC693MDL930 8 Pt. Iso. Relay Out 90-30 NIB
Ref: New GE Fanuc IC693MDL930 8 Pt. Iso. Relay Out 90-30 NIB
GE Time Overcurrent Relay Model 12IAC51B4R IAC
Ref: GE Time Overcurrent Relay Model 12IAC51B4R IAC
GE CR324CXFS SIZE 0/1 SOLID STATE OVERLOAD RELAY NEW
Ref: GE CR324CXFS SIZE 0/1 SOLID STATE OVERLOAD RELAY NEW
(2) GE Overload Relay Manual Resets
Ref: (2) GE Overload Relay Manual Resets
GE Funac 90-30 Output Relay, P/N: IC693MDL940D, 16 Pt
Ref: GE Funac 90-30 Output Relay, P/N: IC693MDL940D, 16 Pt
NEW CR120C24802 GE INDUSTRIAL RELAY 300V 10A 120V 8P
Ref: NEW CR120C24802 GE INDUSTRIAL RELAY 300V 10A 120V 8P
GE FANUC IC693MDL940C OUTPUT RELAY MODULE ****XLNT****
Ref: GE FANUC IC693MDL940C OUTPUT RELAY MODULE ****XLNT****
GE 120B-080** 600V INDUSTRIAL RELAY ***NNB***
Ref: GE 120B-080** 600V INDUSTRIAL RELAY ***NNB***
GE SMART RELAY LOADER PART NO. SRLA
Ref: GE SMART RELAY LOADER PART NO. SRLA
GE CR324CXES SIZE 0/1 SOLID STATE OVERLOAD RELAY NEW
Ref: GE CR324CXES SIZE 0/1 SOLID STATE OVERLOAD RELAY NEW
GE CR324CXHS SIZE 0/1 SOLID STATE OVERLOAD RELAY NEW
Ref: GE CR324CXHS SIZE 0/1 SOLID STATE OVERLOAD RELAY NEW
GE CR324CXCS SIZE 6 SOLID STATE OVERLOAD RELAY NEW
Ref: GE CR324CXCS SIZE 6 SOLID STATE OVERLOAD RELAY NEW
GE CR324CXDS SIZE 0/1 SOLID STATE OVERLOAD RELAY NEW
Ref: GE CR324CXDS SIZE 0/1 SOLID STATE OVERLOAD RELAY NEW
GE CR224C310A Overload Relay 3 Leg Block
Ref: GE CR224C310A Overload Relay 3 Leg Block
GE Relay Drive Card
Ref: GE Relay Drive Card
GE SMART RELAY BLOCK SRBA024D10A INPUT SIGNAL 24VDC
Ref: GE SMART RELAY BLOCK SRBA024D10A INPUT SIGNAL 24VDC
GE CR122B040120A Pneumatic Timer Relay 0.2-60s NEW NNB
Ref: GE CR122B040120A Pneumatic Timer Relay 0.2-60s NEW NNB
GE Fanuc IC630MDL380A Relay Output Module 16 Circuits
Ref: GE Fanuc IC630MDL380A Relay Output Module 16 Circuits
4 GE Overload Manual Reset Relay # CR324C310F; *A12
Ref: 4 GE Overload Manual Reset Relay # CR324C310F; *A12
GE Fanuc IC693MDL940D Output Module Relay #7090
Ref: GE Fanuc IC693MDL940D Output Module Relay #7090
GE CR120A08022AA, 300V Relay, Series A, NOS