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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。

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WESTINGHOUSE CUTLER HAMMER FDB3025S 3 Pole 25 AMP Type FDBVISABREAKER

RAY VAL RV-1000L-24 DC Power Supply Input 19-72 VAC Output 24.5VAC 28-40 AMP

CARLO GAVAZZI RGC2A60D25KKE RG Solid State Switch Relay 2P SSCDC IN ZC 600V

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LITTELFUSE SMC SGF-25 C4310 001B Sensitive Ground Fault Relay120 VAC

LITTELFUSE STARTCO Model SE 701 01 Ground Fault Monitor 120 VACSE-701-01

CUTLER HAMMER WESTINGHOUSE 1000PBPR20 PB TRI PAC Current LimiterFUSE 179C322G04

CUTLER HAMMER WESTINGHOUSE 500NBP12 NB TRI PAC Current Limiter300- 500 Amp

DYNAPAR DANAHER 3/8 Shaft SK SD MT Encoder 62502500001

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CUTLER HAMMER WESTINGHOUSE AUX CT Module with Ground6506C45G02

DELIXI HANGZHOU CD1 EM60G2R2S2B Inverter 1 PH 220 VAC 50/60 HZ10 Amp

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SMC ITV2030 40N3CL4 Pneumatic Regulator IT2000 ITV2000

KOHLER 31613391401 D3440001C Temperature Input Module 15-36V

CUTLER HAMMER WESTINGHOUSE HKB3175T 175 AMP Type KB HKB TRIPUnit 875-1750

SIEMENS 3UF7113 1AA00 0 SIMOCODE 3UF71 Overload Relay 20-200 AMPCurrent Voltage

WESTINGHOUSE CUTLER HAMMER MCP431800CR 3 Pole 150 AMP Type MCPMotor Circuit

TOHNICHI FTD100CN2-S 100-2 CN-M TORQUE SCREWDRIVER Metric DialFTD100CN2 S

TE CONNECTIVITY 128 21249 VERSUM MATERIALS LEVELGUARD ContinuousLevel Control

EATON PDG3X3TA4003W K Frame TA400K3K 3TA4003W PDG3 Type KD HKDLug Terminal Kit

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WESTINGHOUSE FB 70 AMP Magnetic Adjust MCP Motor CircuitProtector 2610D53G31

EATON CUTLER HAMMER 6716C40 Size 5 Vacuum Interrupter BottleV200 V201

SIEMENS 6GK5005 OBA1O 1AA3 SIMATIC NET SCALANCE X005 5 Port RJ45Switch Module

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RECHNER N-180/ 1-IL 220 V AC Relay Sensor 512000 N 180 1 ILD6840

CUTLER HAMMER L Frame Model E Shunt Trip 120-240 VAC 125VDC KAS4SHNT-E

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SIEMENS 3RB2056 1FC2 Electronic Overload Relay 50-200 AMP

SIEMENS 3RB2153 4FC2 Electronic Overload Relay 50-200 AMP

GE FANUC IC693UDR010BP1 24 V Series 90 Micro Controller

ABB T1B 160 Circuit Breaker w/ erwork & Mounting Screw Packet125AMP TMAX

SIEMENS EM6B025T 3 Pole 25 AMP EM6 SENTRON MINING CircuitBreaker

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SIEMENS 3VA5220 5EC31 TM230 200 AMP TRIP Unit 3VA5 1000-2000TRIP Amp GP/220914

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