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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。

DYNASONIC UHC100 24VDC Ultrasonic Heat Meter BADGER THREADED G2L300 mm WATER LT

MARATHON ELECTRIC 2506 5 HP Motor 6VCAN 208-230 VAC1745 RPM 5 Horse

NEXTRACKER Model SPC100 B COLD NX HORIZON Weather Station SolarTracker 30 VDC 6

EATON ECX11E1TJA S29 XT HVAC Contactor 2 HP 120 VAC 9 AMP Nema 1CE43108G12

EATON WCBC1F Size 1 Advantage W200 Contactor PC Board1A96697F01

EATON CUTLER HAMMER ECC03C1C2A 460 VAC 30 AMP Lighting Contactor2 Pole 1 Nema

WESTINGHOUSE LB2400 LB Breaker 2 Pole 400 AMP 120 VAC Shunt Trip68E6080 MAG

EATON COOPER CROUSE HINDS 0AC3473 Model M90 Nema A600 SelectorSwitch Hazardous

BANNERDC 12-240 VAC SM30 30mm Barrel Sensor 27562

FOXBORO RTT20 DILGQFA Temperature Transmitter 0-1562 Degrees FModel RTT20-D

ALLEN BRADLEY 2090 CAWM7DF 16AA40 Power Cable 40M Shielded 4Strand

Eaton Cutler Hammer MSRR IZM SR230AD Shunt Trip Magnum DS2A11792G22 2C12790G29

EATON HMCP030H1S 30 AMP HMCP030H1 Safety Visa View Motor CircuitProtector

SQUARE D EDB34015LH 3 Pole 15 AMP Type EDB Circuit Breaker

VARIAN 04 709738 02 B LASER Interface Module 04 709740 02B FAB04 709739 01 02b

HUBBELL 3004 Type K1 77 AMP Resistor 30855 310 1.21 OHM

EATON CUTLER HAMMER 1HD363NF 3 Pole 100 AMP Nema 1 Safety SwitchIndoor 600 VAC

EATON CUTLER HAMMER HMCP030H1C 30 AMP Type HMCP Motor CircuitProtector

MILWAUKEE VALVE 97097A-L BBVSC100 2 Butterfly Valve Bronze 175PSI 2" Pipe Size

EATON CUTLER HAMMER A202K1EBM 4 Pole 5 Pole 208 240 VAC 30 AMPAC Lighting

SIEMENS 6SL3246 0BA22 1BA0 SINAMICS CU250S 2 USS Controlunit

WESTINGHOUSE CUTLER HAMMER AN43A Size 4 A200 Starter MountThermal 5667D76G16

ROSEMOUNT 644HNAJ6 Temperature Transmitter P+100 38J 4 WireModel 644 0-150 C°

EATON CUTLER HAMMER AE56DN0AC 110 120 VAC Size D ReversingStarter 18 AMP

MAPLE SYSTEMS OIT3165 A00 Operator Interface Terminal 2x20Backlit LCD

SIEMENS 549-621 POWER MEC Model 1210F PXM HOA FLN APOGEEAutomation Module

DELTA ASD B1521 A 1.5KW 200-230V AC 110V Output

DELTA ASD B0121 A 100W 200-230V AC 110V Output

COOPER BUSSMANN KRP C 2500SP 600 VAC 2500 AMP Bolt In Fuse LowPeak Dual Time

SIEMENS 48FM4R 4G Current Limiting Fuse 25 Current4R 2400-4800 Volt

EATON COOPER 83F080 HXEF 8.3 KV HX Limiter Fuse 80 AMP 30 KACombined

EATON BUSSMANN AMP 690 VAC 4BKN165 FuseTR700-200KA

COOPER POWER FA3H 80 Type NX 80 AMP Fuse 8.3 KV FA3H80 50 KA 80C AMP

EATON 2 Pole 30 AMP QBGFEP Ground Fault CircuitBreaker Equipment

YORK 025 33731 000 Johnson Controls BELIMO GMX24-3 MotorizedActuator 24 VAC VDC

FPS FOSSIL POWER SYSTEMS Model 9160 2018 Flame Monitor DetectorModule

EATON CUTLER HAMMER AN56AN0CC 440/480V Size 00 AN56AN0 ReversingStarter

EATON CUTLER HAMMER SNT1RP08K F Frame Shunt TRIP 48-127 VAC48-60 VDC 1490D71G15

W E ANDERSON H3S 2SC Duo Tect Pressure Switch 1500 PSI HazardousLocation

CONNECTICUT ELECTRIC UBITBFP2002 Type UQFP 2 Pole 200 AMP MainCircuit Breaker

EATON CUTLER HAMMER UVH4LP08K 110 127 VAC Type LD HLDUndervoltage Release

COOPER POWER 83F100 IVBTB 100 AMP 8.3 KV 50 KA X-Limiter FuseCombined

FOXBORO INVENSYS Model RTT15 TILMQTXF LI I/A Series TemperatureTransmitter

WESTINGHOUSE CUTLER HAMMER HMA3500T 500 Amp Type MA HMA TripUnit 371D37G23

EATON CUTLER HAMMER SNT6P23K 48-60VDC R Frame Shunt Trip1495D41G55 Type RD

EATON CUTLER HAMMER SNT6P05K 48-60VAC R Frame Shunt Trip1495D41G53 Type RD

EATON CUTLER HAMMER AN14GN0BE008 220/240V Size 2 AN14GN0 Starter1.6-8A Overload

GE POWER & WATER 151X122EK01PC04 GE WINF 109W6930P001 PowerSupply Module

CUTLER HAMMER Circuit Breaker CELL HARNESS TRIP Unit WiringHarness 6503C57G03

EATON CUTLER HAMMER HMCP050K2C 50 AMP Type HMCP Motor CircuitProtector 150-500

H.O TRERICE MODEL V80361 Vapor Actuated 6" DIAL Thermometer 0 to100°F 40' Braid

ROSEMOUNT ANALYTICAL SCL R 400 M2 SOLU COMP Water 125 VDC 120

YOKOGAWA MX10 UNV M10 S1 DA ANALOG Input Module

MOOG MODEL 7 08807 Quick Set Power Supply Outdoor Rated 115-220VAC 12-24 VDC

PMS VMH KF 50 AL (2) Vacuum Exhaust Port Optical View Heated 115VAC 1.5 AMP

GARRETTCOM MAGNUM 6K16V Managed Fiber Ethernet Switch Vertical24 VDC XX Alarm

SMC NCDY1S25L 0550 A77L 100 PSI GUIDED CYLINDER

EATON CUTLER HAMMER C25HNE3120A 120 VAC C25HNE3120 DefinitePurpose Contactor

WESTINGHOUSE CUTLER HAMMER A200M2CMC A200 Size 2 Starter 48VDCCoil Model J NNB

EATON Charlynn 101 3112 009 ORBIT Hydraulic Motor 2932015833-001

EATON CUTLER HAMMER FG3020 3 Pole 20 AMP Type FG GeneratorCircuit Breaker

EATON C440B2A100SF3 C440 Electronic Overload Relay 20-100 AMPSize 3 Ground Faul

EATON N101CS1B3A IT NEMA FVNR Size 1 Starter 27 AMP 3 Pole 24VDC 3-10 Hp

COOL SYSTEMS 503590 500 10346 001 MED4ELITE PCBA FET CONTROLModule M4 503590

DATALOGIC CBX510 10-30 VDC DATA Connectivity CommunicationsModule

MI MOORE Industries SPA HLPRG 2PRG U Type SPA2 Programmable TRIPALA

EATON CUTLER HAMMER OPTC3V Communications Card 9000X SeriesDrive Option Kit

STANCOR MODEL 821 B300 Liquid Lever Controller & MotorProtection Overload Relay

EATON CUTLER HAMMER FDB2125 2 Pole 125 AP Type FDB

INOVANCE Model MD200S0 4B SUZHOU Monarch Drive Inverter 2.6-6.5AMP 0.4 KW Input

EATON CUTLER HAMMER AGSHWCH120N10XS POWELINE Filter 120 VACSurge Suppresser

EXOR EXWARE703 EXW703UOP1 24 Volt Gateway IOT ControllerModule

EATON CUTLER HAMMER 00TB 000 VDC Coil TB TB 141 1

K-TEC GFR3001 Ground Fault Relay Module Discontinued

K-TEC GFR3001-6 Ground Fault Relay Module GFR3001 6Discontinued

GE General Electric D 763041 000X1 4 Pole 160 AMP 60-160 TRIPAMP EN160163

SCHNEIDER ELECTRIC EMS58351 21-2020-W19 EASERGY FLAIR 21D FaultIndicator Relay

AMPHENOL 1026931 PDW LDM14020EANN26 DWDM SLGX 40ch 20-59 DTP UPGEXP OTDR 40

DANFOSS 037N0037 Soft Starter Motor Controller MCI 15 230 VAC 15AMP 24-230 VAC

LUMONICS Model 0633 181 00 2-BD Tube Laser

COOPER BUSSMAN JCN 80E 15.5 KV 80 Amp Fuse 7184A99G07

EOTEC 6000 ZEOT6C07E1 6C07 Interface Module Reliance R-NET I/O1/CA-6000

EATON GFEP230 2 Pole 30 AMP Type BR Ground Fault En GFEP

SMC JXC918 LEY40A 250 Type JX Motor Driver PEN Power Supply 24VDC

EATON CUTLER HAMMER GMCP015E0CA3 15 AMP GMCP Motor CircuitProtector 1A 1B Aux

EATON CUTLER HAMMER SNT3P11K 110-240 VAC 110-125 VDC K FrameShunt TRIP 6642C88G

EATON CUTLER HAMMER GEE3063FFG 3 Pole 63 AMP 415 VAC CircuitBreaker

EATON CUTLER HAMMER ECX09D3CAA XT IEC FVNR Starter 460V Nema 4Enclosure Mods: K

GENERAL ELECTRIC 9T51B0209 Buck Boost Transformer .750 KVA TypeQB Primary

EATON CUTLER HAMMER ECN0122A2A 120V CN15GN2 45 Amp Size 2Contactor Mods: S29

ALLEN BRADLEY 2755 DD1A R1 Dual Head Enhanced Bar CodeDecoder

EATON CUTLER HAMMER SNT4RP23K L Frame Shunt TRIP 48-60 VDC TypeLD HLD 1493D40G

EATON CUTLER HAMMER SNT3T04K 12-24 VAC VDC K Frame Shunt Trip6642C92G21

SIEMENS 6ES7 138 6BA00 0BA0 SIMATIC ET 200SP TechnologyModule

SCHNEIDER ELECTRIC 33659 Compact NS 24 VAC 24-30 VDCUndervoltage Release MX-XF

EATON CUTLER HAMMER ECL03C1A4A 30A 6P Lighting Contactor 110 120V MODS:P29P67

EATON CUTLER HAMMER BCLS2 200 Motor Circuit Fuse 200(9R) 2.54 KV200 AMP BCL5

ASCO 8210B46 110/120V 1 3/4" 5-125 PSI Red Hat SolenoidValve

SIEMENS 6ES5 905 3RB21 ZB CPU Memory Sub Module

EATON CUTLER HAMMER ECN0501AAA Size 0 AN19BN0 Starter Nema 1Enclo Mods: R63/B

MERSEN FERRAZ SHAWMUT A60X2000 128 AMP TRAP 2000 AMP 600 VACFuse

EATON UTT E5213B CH Nema 3R 600 VAC 250 AMP MAX 200 AMP MeterBase Single

PARVALUX SD38 0079 CONT W 10100637 03223 Type SD38 Motor Gearbox120 VAC 400 RPM

EATON TSU5 20 AMP 600 VAC Meter Socket Base CSA Rated Nema 3REnclosure

ALLEN BRADLEY Dual Wound Transformer 1497 N43 Part # 231 596 2.0KVA

EATON CUTLER HAMMER ECN0512TAA Size1 AN19DN0 Starter 24VAC CoilNema3R Enclosure

EATON ECN071BDA 120 VAC Size 1 AN19DN0 Starter Nema 1 EnclosureRed Run Green

SIMPLEX 4100 POWER DISTRIBUTION Interface Chassis RACK ALA

Genaral Electric G E CR306K602 Magnetic Starter nama size 1 2pole 1 overload

ALLEN BRADLEY Seperate Mounting 160-240 Amp Overload Relay 193FPD240

ALLEN BRADLEY SMP Maunal/Auto Reset Overload Relay 96-300 Amp193 B1N6

SIEMENS 505 4916A Relay Output Module 2586271 0002

EATON ECN0511AAA 120 VAC Size 1 AN19DN0 Starter Nema 1 Enclosure9-45 Electronic

SEALED BOSCH OEM 1 ST/PC 1 986 A01 365 WGP ALT28V80AR AlternatorGenerator 1986A

TOSHIBA VFS7 4015UPL 380-460V 3.7 Amp Tosvert VF DriveInverter

OMEGA LVK 121 PUMP Float Lever Switch Kit 50-240 VAC Pilot Duty20 V.A.

DIGI 70002544 Connect Port X4-H ZB LTE US GE Water GeneralElectric POWER&WATER

ALLEN BRADLEY 1771 0X Ser A Power Contact Output Module 2009Date Code 1771-0X

ACLARA Y99862 DRU Demand Response Unit 4-Relay Y99860 301 Type4X Raintight 208

DRESSER Type 1543J CONSOLIDATED SAFETY VALVE Size 2 PressureRelief Valve

AEG THYRO-A AE Advanced Energy 1A 500 60 H RLC 500V Relay Out 4A250v HRLP1

ABB T4N150TW 3 Pole 150 Amp BKR T4N 150A 3P SACE T MAXBreaker

BODINE ELECTRIC 0836QQ Type FPM Adjustable Speed Motor Drivewith Torque Control

OHMITE MOUSER 588 1044AS151KDS 150 OHM 300W 60 Ohm CeramicResistor 72819 1935

LA WEAVER MANUFACTURING #330 330 Cabinet Crown Door Fixture JigTemplate Panel

EATON CUTLER HAMMER MMX34AA5D6F0 0 5.6 Amp 3 HP 480V M MAXuency Drive

NEC NEAX 2400 N2400 PA-PW35-A DC-DC PWR-35 SP650 A 2A PowerModule with 48 VDC

SIEMENS PXC24.2-PERF.A RS485 Ethernet Rooftop AIR ControllerModule PXC24 2 PERF

DRIESCHER ENSIEN HARVEY HUBBELL 2535 202 Current Limiting Fuse7.2 KV 16 AMP

PACIFIC SCIENTIFIC R24HSNA HS NS NV 03 Brushless REGAL Ke 32.5V/KRP

EATON CUTLER HAMMER FDB4060L 4 Pole 60 AMP Type FDB CircuitBreaker FDB4060

ASM ASM 29128 PCB 29127 230VAC DC Control Board Module