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PLC输入输出模块是PLC与工业现场设备之间的核心连接桥梁，负责完成信号的双向转换与传输，是自动化控制系统里的关键组成部分。

一、核心作用

二、主流分类

按照信号类型和功能，可分为四大基础类别：

1. ‌数字量输入模块‌：接收开关通断类的二进制信号，常见支持24V DC或220V AC输入，适配按钮、行程开关等设备。

2. ‌数字量输出模块‌：分为继电器型、晶体管型、晶闸管型三类：

3. 继电器型：可驱动250V/2A交流负载，适合接触器、电磁阀等设备，机械寿命约10万次。

4. 晶体管型：响应速度可达0.1毫秒级，仅支持30V以下直流负载，适配高频脉冲控制场景。

5. 晶闸管型：专为220V交流负载设计，无火花通断，适合加热管、交流电机控制。

6. ‌模拟量输入模块‌：采集温度、压力等连续变化的物理量，支持4-20mA、0-10V、热电阻、热电偶等信号格式。

7. ‌模拟量输出模块‌：输出连续的电压/电流信号，用于控制变频器、比例调节阀等需要无级调节的设备。

WESTINGHOUSE CUTLER HAMMER A200 A201 Size 2.5 Contactor 5 Pole120 V 7872A37G02

DISTECH CONTROLS HORYZON C10 A 24 VAC VDC 10.1" IP CAPACITIVETouchscreen Color

COSEL ACE300F AC3 002D 00 Power Supply Input 100-240 VAC Output250/300W Max

EATON CUTLER HAMMER CE15NN3A 120 VAC Size N CE15NN3 IECContactor 140 AMP

BOX OF 1000 SCHAEFFLER INA F 240341 AXE A0027809 SphericalRoller Bearing 261125

EATON PDD23F0200TFFL 3 Pole 200 AMP PDD2 Power Defense CircuitBreaker

DWYER MERCOID CONTROL DA 31 153 7 Mercury Controlled PressureSwitch 120 240 VAC

EATON HMCP100R3S 100 AMP HMCP100R3C Safety Visa View HMCP

EATON CUTLER HAMMER WC0IL56 Size 5 6 W200 W+200 Starter Coil1A96712G01 C130422

GENERAL ELECTRIC SEHA36AT0060 3 Pole 60 AMP Spectra RMS CircuitBreaker

EATON CUTLER HAMMER FDMP3080L 80 AMP Type FDMP Motor CircuitProtector Breaker

WESTINGHOUSE CUTLER HAMMER MORA 4 ACK 137 AMP Modular OverloadRelay 1373D06G21

WESTINGHOUSE 350 Amp Trip Unit for MA Frame MA3350T

EATON JT310032 40-100 AMP Electronic LSI TRIP Unit J Frame JGHJGE JGS 69D2805G0

CPI CHATSWORTH PRODUCTS 12096 703 X7-OBK Double Sided NarrowVertical Cabling

Westinghouse JB breaker 3pole 90amp frame size 250

GRANVILLE PHILLIPS MKS 275400 1 GE T Series 275 MINI CONVECTRONVacuum Pressure

SIEMENS 6ES7 133 0HH01 0XB0 ET 200B 8DI 8RO AC SIMATIC S7DIGITAL IN Relay

SIEMENS 6E37 133 0HH01 OXB0 ET 200B 8DI 8R0 AC DIGITAL IN RelayEI200B

CUMMINS Generator Model OTPCB  Lid Door Assembly StainlessSteel

EATON C799B410 Nema 4X Stainless Steel Size 3 Starter Enclosurewith CPT

MITSUBISHI SH V160Q3 Vacuum Contactor 100-1500V 160-1803

EATON MBE1224B100BTS 100 AMP Type BR Outdoor Meter Breaker BaseEnclosure

BALDOR AC 4000 RPM 300V WBSM100B 275CA

EATON CUTLER HAMMER ECN0701EJA Size 0 Starter Nema 1 EnclosureMod A29S29 R50119

DELTA ECMA C31020ES 2 KW 12 Amp 110V AC 3000 r/min

WESTINGHOUSE MA2800F Type MA Circuit Breaker Frame 2 Pole 800Amp

SEALED BOX OF 3000 PANDUIT PV14 6RB 3K BLUE VINYL Insulated DRing Terminal #6

SEALED BOX OF 2000 PANDUIT PV10 6RB 2K Yellow Vinyl Insulated DRing Terminal

KH CONTROLS ISS1 13.0 6.80 AL1 3548 Intrinsically Safe SourcePower Supply

EATON ECL04C1A6A 6 Pole 30-60 AMP Latched Lighting Contactor 120VAC Nema 1

EATON CUTLER HAMMER ECN0721CAA Size 2 Starter AN14GN0 Nema 1Enclosure Mod R61/F

TRANE TR-170 134X7112 TR170 Variable Speed Drive 1.5KW 2 HP IP20240 VAC

MAGNETROL MODEL APM 131L MODULEVEL Liquid Level Sensor 230 PSI250 PSIG

OCENCO AR-100 MODEL AR100 MSHA APPROVED MINING MACHINE LightAssembly Explosion

ROSEMOUNT MODEL 3144 D1NA SMART FAMILY HART TemperatureTransmitter 12-42 VDC 0

Cutler Hammer MCE15SN3A Freedom Series Contactor Coil 110/120V50/60 Hz Open Typ

WESTINGHOUSE Type HKA Mark 75 Circuit Breaker Frame 3 Pole 225Amp HKA3225F

ROSEMOUNT 644HNAJ6 Temperature Transmitter PT100 385 Sensor 4Wire Model 644

CUTLER HAMMER WESTINGHOUSE N Frame NB NC Circuit Breaker Plug inModule

EATON CUTLER HAMMER Definite Purpose Contactor 3 Pole 120 Amp24V C25HNE3120T

EATON COOPER ULA A9 D U SYM VM 9 7030 BK 70 LED 120 277 VACACORN Utility Street

(SEALED) PANDUIT PV18 6RB 3K Red Insulated Crimp on RingTerminal 18-22 AWG

GE GENERAL ELECTRIC PLE3ESFG02 480V Power Leader EPM ElectronicPower Meter

ALLEN BRADLEY 140U J EOPZ Motor Operator JG 24 VDC Cutler Hammer69D6440G21

Cutler Hammer HFD4080L 80 amp 4 pole Industrial circuitbreaker

EATON MBE2040B200BTF Nema 3R 200 AMP Meter Socket Load Center 20Space

EATON BUSSMANN 170M7511 Semiconductor 1700 AMP 1250 VAC 1200 VDC4SBKN/105

EATON CUTLER HAMMER A201K2CM Size 2 A200 A201 Contactor 48 VDCCoil 3 Pole

SONOCAN A500033 Revision E CSAM II MOTHERBOARD Encoder InterfaceModule

WESTINGHOUSE NL-750B-H Numa Logic 2 Channel Analog Converter NC750 2618D31G02

EATON CUTLER HAMMER SPD050208Y1B SPD 50KA Surge ProtectiveDevice 600 0003B

SEETECH 557520N 13S5S149 0107VDN CM38 Filter Housing Assembly20094746 8700 PSI

SIEMENS FURNAS Size 1 Two Speed Starter 110/120V 30DP32A2VF

EATON CUTLER HAMMER ECH1601AJA Sze 0 Starter Nema 1 EncloAN16BN0 Mods H5/D11529

WESTINGHOUSE JA3125 3 Pole 125 Amp Type JA Circuit Breaker657D791G15

BASLER ELECTRIC BE159N A7ED1JC0S0F Solid State BE159N-0Protective Relay

EATON C799B211 Starter Enclosure Size 3 Size 4 Nema 3R RaintightExternal Reset

EATON CUTLER HAMMER WCOIL56F W200 Advantage Starter Coil Size 5Size 6 1A96712G0

WESTINGHOUSE CUTLER HAMMER JB3090 3 Pole Type JB JB3090V CircuitBreaker

SEALED ALLEN BRADLEY 5069 IB8S Compact 5000 DC Safety InputModule 193411 5170

ABB DSQC 2498 GME System 91024-148 Capacitor Module ServoAmplifier 3HAA3563 AHA

ALLEN BRADLEY 1000 NX163 Size 1 Two Speed Reversing Starter 120VCoil

Eaton Cutler Hammer Mechanically Held Lighting Contactor Nema 1Enclo ECC04C1TBA

WESTINGHOUSE CUTLER HAMMER JB3125 3 Pole 125 AMP Type JB CircuitBreaker

ABB BAILEY INLIM03 INFI 90 Interface Loop Module INLIM-03

GENERAL ELECTRIC FANUC IC609SJR102A RS SJR DC IN OUTController

CUTLER HAMMER ELFD3015L 3 Pole 15 Amp ELFD Earth LeakageBreaker

Eaton Cutler Hammer C799AE4 with A50CN0 NEMA 1 reversing starter120 volt coil w

PHOENIX CONTACT CM175-PS-120AC/24DCU/10 Power Supply CM175 PS120AC 24DCU 10

ALLEN BRADLEY 160 BA01SF1 AF DS P1C Motor Drive Speed Controller160 BA01PSF1

EATON CUTLER HAMMER 3HD363NF 3 Pole 100 AMP Nema 3R Safey Switch600 VAC Outdoor

EATON CUTLER HAMMER I IQ 100 Voltage SensingMonitoring Relay

RELIANCE ELECTRIC DBU 100 415 480 V 100 Amp Dynamic Braking Unit837 02 11

ABB K7WMK SACE ISOMAX S Withdraw Kit S7 3P 1SDA023299B1

Eaton Cutler Hammer ECC04C1T4A Lighting Contactor 24 Vac Coil 30Amp

WESTINGHOUSE DA3400N 3 Pole 400 Amp Non Auto Type DA Molded CaseSwitch

WESTINGHOUSE KA3225SNW 3Pole 225Amp KA Non Automatic CircuitBreaker 459D971G08

EATON DC1 342D2NN A6SN 1HP 480V Power XL DC1 Variable Fre VFD

EATON CUTLER HAMMER AN13KN0A5E100 Size 3 120V 20-100 AMP SpaceSaving Starter

CUTLER HAMMER FDB Breaker 4 Pole 80 Amp FDB4080E

SIEMENS C79451 A3261 D71 PC Control Module Base Plate

MODICON MM PMMP003C PanelMate PM + 1000 Mod Bus Plus InterfaceModule

SIEMENS 3VA4111 4ED34 0AA0 3 Pole 110 AMP SEAB 3VA4 CircuitBreaker Frame 125S

SQUARE D 3N141110633 LG 400 Power Pact Circuit Breaker MicroLogic Trip Unit

ABB S3N150 S3N150ML Circuit Breaker

SIEMENS 3VA4112 4ED34 0AA0 3 Pole 125 AMP 3VA4 Frame 125SCircuit Breaker

TELEMECANIQUE TSX1722028 TSX17-20 Input Output PLC Relay ModuleTSX 172 2028

SEALED EATON CUTLER HAMMER SNT6P03K 24 VAC VDC R Frame ShuntTrip 1495D41G52

WESTINGHOUSE CUTLER HAMMER HLA2600T 2 Pole 600 Amp LA HLA TripUnit 2603D46G13

GENERAL ELECTRIC TJD434250WL 3 Pole 250 AMP Type TJF CircuitBreaker 415 VAC

MERLIN GERIN ALIP 6716790 2E146 PC Control Module 6716789XD 2C1C

WESTINGHOUSE ABB RSC II 240VAC Reclose Module 8009A95G02RSC-II

ABB WESTINGHOUSE RSC II 240VAC Reclose Module 8009A95G08RSC-II

MPE Motor Protection ISB10 Intrinsically Safe Barrier 10 Input10 Output

BENTLY NEVADA 3300 3005 02 02 01 00 Six Channel TemperatureMonitor

CUTLER HAMMER Motor Circuit Protector w/ 110-125 VDC ShuntHM2P250K5C YS10

EATON CUTLER HAMMER EGS7125AFG 4 Pole 125 Amp E125S EGSBreaker

CUTLER HAMMER FD4080LA06S02 FD Circuit Breaker 9-24V Shunt 1A 1BAuxiliary

CUTLER HAMMER HFD-DC Breaker 3P 125A 1A 1B Aux Shunt TripHFDDC3125LA0205S2605

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EATON CUTLER HAMMER I I Energy Sentinel3D52828G13

Westinghouse Cutler Hammer Starter Reversing Size 1W210MCCFCY7

ALLEN BRADLEY Speed Controller Motor Drive 160 BAO3NPS1 DeviceNet 160 DN2

EATON CUTLER HAMMER FD4150 4 POLE 150 AMP BREAKER 1A 1BAUXILIARY FD4150WA06

EATON CUTLER HAMMER Vertical Reversing Starter Size 1 480V CoilAN56DNVOC

Teco Westinghouse EQ5 2001 N1 Motor Drive serial # 8XA353A0002230 v 1 hp

CUTLER HAMMER WESTINGHOUSE SPB 100 Drawout Stab Rear 2500-5000Amp 1272C59G03

LEESON C4D17NK1D 108010.00 1/4 HP Motor Direct Current 90 VDC1750 RPM Permanent

SIEMENS 560 2123 SIMATIC T1560T Processor Unit

GALVANIC APPLIED SCIENCES MSG 8020 4014 0 Water Pressure ControlModule

SCHNEIDER ELECTRIC LV540316 3 Pole 280-400 AMP Easy Pact CVS 440VAC CVS400N

GENERAL ELECTRIC CR305D003 Size 2 110 120 VAC Magnetic Contactor45 AMP

WESTINGHOUSE CUTLER HAMMER FDB4150 4 Pole 150 AMP Type FDBCircuit Breaker

ALLEN BRADLEY 700 RTA00V200A2 .015 - 64 Minute 220/240V RTATiming Relay Timer

Eaton Cutler Hammer Starter 110/120V Coil XTFC058DDA

ABB SACE ISOMAX S3 L 150 SACE S3 Circuit Breaker 20 amp 600 V 3Pole

ALLEN BRADLEY NEMA Starter Stainless Steel Enclosure 509ACA

3S LIFT BCCF100201 CFD22070718 CLIMB Auto System Main ElectricalControl Cabinet

ABB PM556 TP ETH 512KB Central Processing Unit EthernetModule

ALLEN BRADLEY 1745 E101 SLC 100 Programmable ControllerExpansion Unit Series B

Westinghouse HLB Breaker 2400F 225 Trip other Trip Available 125Vdc Shunt

EATON CUTLER HAMMER A201K3BA Size 3 A200 110 120V 2 PoleContactor

Cutler Hammer CD4 250 J 208-240VAC 220-250VDC J Frame MotorOperator 69D6432G58

EATON CUTLER HAMMER TAA ASSY KITS 744 A0641 00P Chassis Assembly1060RA/PW 9/30

SOLA 9 07555 3120 01 Interface Control Module 9 07555 02Revision 01 *SEALED BAG

SOLA 9 07618 0200 00 I'ACT SENSE BD 3 120 Control Module *SEALEDBAG*

CUTLER HAMMER WESTINGHOUSE A200 A201 Size 6 120 V AC 125 VDCCoil

ELECTRO CAM PLUS CONTROLS Programmable Limit Switch PS 6144 24M17 H L MB

EATON CUTLER HAMMER Earth Leakage Ground ELFD Breaker 30 Amp 3Pole ELFD3030L

Square D HGF36150 Circuit Breaker with lockout & rearconnectors

WESTINGHOUSE Ground Fault Relay 5-60 Amp 120 VAC 1293C47G02

SYLVANIA JOSLYN CLARK KTM35-1 Size 5 3 Pole Contact Kit KTM 351

Allen Bradley 2755-DM1 decoder for laser scanner 115VAC 60HZ

SIEMENS SLT3630TA 3VF9627 1BM40 Type 3VF6 Trip Unit 500-630AMP

Eaton Cutler Hammer westinghouse M0RA4AAE Modular Overload Relay600 Vac

EATON CUTLER HAMMER S751L16N3S 16 Amp Soft Starter92ET10002A0001A

CUTLER HAMMER HMD3500T 500AMP Trip Unit 371D372G23 2500-500Thermal Trip

CUTLER HAMMER HMD3800T 800AMP Trip Unit 371D373G30 Type MD MPHMP

CUTLER HAMMER PAD3J 3 Pole JG Plug In Adapter Module68D9102G11

PEPPERL FUCHS IRI KHA6 4.RX K System IDENT-I Interface RelayModule

SIEMENS SLT3500TA 3VF9627 1BK40 Type 3VF6 3VF9 TRIP Unit 400-500AMP

CUTLER HAMMER WESTINGHOUSE Circuit Breaker HFDDC3050LB10S30 w/Shunt Trip & Aux

GROUPE SCHNEIDER CARRIERE CTI FB600ER2 RMS Trip Unit 5 25110002

HONEYWELL 2MLF H02A CC Master Logic 200 High Speed CounterModule Open Collector

CAT CATERPILLAR GLOBAL MINING 531 6557 PMC 11 Coupler 4008 034160 00 03

Siemens ITE EMKB125MC2L Mining Duty Circuit Breaker type EMK 125Amp 3pole

CUTLER HAMMER WESTINGHOUSE Special Coil 2050A14G24 A200 Size 5120 VDC 120 VAC

ALLEN BRADLEY 1400 BCU Plug In Communications Power MonitorModule 1400-BCU

Allen Bradley SLC 500 Processor Unit 20 I/O 1747 L20B PLC

WESTINGHOUSE CUTLER HAMMER IQ RMS Data Relay 2D78533G03

EATON CUTLER HAMMER WCK43 Advantage W200 W201 Size 4 ContactKit

SIEMENS SBUV48 SB Frame Under Voltage Release 48 VDC 122816C