福建中立恒自动化设备有限公司

1．输入/输出单元

输入/输出单元通常也称I/O单元或I/O模块，是PLC与工业生产现场之间的连接部件。

PLC通过输入接口可以检测被控对象的各种数据，以这些数据作为PLC对被控制对象进行控制的依据；同时PLC又通过输出接口将处理结果送给被控制对象，以实现控制目的。

由于外部输入设备和输出设备所需的信号电平是多种多样的，而PLC内部CPU的处理的信息只能是标准电平，所以I/O接口要实现这种转换。

I/O接口一般都具有光电隔离和滤波功能，以提高PLC的抗干扰能力。另外，I/O接口上通常还有状态指示，工作状况直观，便于维护。

PLC提供了多种操作电平和驱动能力的I/O接口，有各种各样功能的I/O接口供用户选用。I/O接口的主要类型有：数字量（开关量）输入、数字量（开关量）输出、模拟量输入、模拟量输出等。

常用的开关量输入接口按其使用的电源不同有三种类型：直流输入接口、交流输入接口和交/直流输入接口。

常用的开关量输出接口按输出开关器件不同有三种类型：是继电器输出、晶体管输出和双向晶闸管输出。

继电器输出接口可驱动交流或直流负载，但其响应时间长，动作频率低；而晶体管输出和双向晶闸管输出接口的响应速度快，动作频率高，但前者只能用于驱动直流负载，后者只能用于交流负载。

PLC的I/O接口所能接受的输入信号个数和输出信号个数称为PLC输入/输出（I/O）点数。I/O点数是选择PLC的重要依据之一。当系统的I/O点数不够时，可通过PLC的I/O扩展接口对系统进行扩展。

2．通信接口

PLC配有各种通信接口，这些通信接口一般都带有通信处理器。

PLC通过这些通信接口可与监视器、打印机、其它PLC、计算机等设备实现通信。

PLC与打印机连接，可将过程信息、系统参数等输出打印；与监视器连接，可将控制过程图像显示出来；与其它PLC连接，可组成多机系统或连成网络，实现更大规模控制。

与计算机连接，可组成多级分布式控制系统，实现控制与管理相结合。远程I/O系统也必须配备相应的通信接口模块。

3．智能接口模块

智能接口模块是一独立的计算机系统，它有自己的CPU、系统程序、存储器以及与PLC系统总线相连的接口。

它作为PLC系统的一个模块，通过总线与PLC相连，进行数据交换，并在PLC的协调管理下独立地进行工作。

PLC的智能接口模块种类很多，如：高速计数模块、闭环控制模块、运动控制模块、中断控制模块等。

SCHNEIDER LADR2 OFF DELAY TIMER ADD ON BLOCK TIMING 1-30S

SCHNEIDER LADT2 ON DELAY TIMER ADD ON BLOCK TIMING 1-30S

SCHNEIDER LC1D1801E7C POWER CONTACTOR 18AMP VOLTAGE 42-48VAC

TELEMECANIQUE LA2-D22 TIMER TIMING 0.1-30S ADD ON BLOCK

MOELLER PLS6-C16/2-MW MINITURE CIRCUIT BREAKER 16A 2POLE

TELEMECANIQUE LR1-D09306A65 THERMAL OVERLOAD RELAY RANGE 1-1.6A

SCHNEIDER ELECTRIC CA3KN40BD AUXILIRY CONTACTOR VOLTAGE 24VDC

TOB012BC1 THERMAL OVERLOAD RELAY RANGE 6-12AMP

Allen Bradley N16 Thermal Overload Heater Element Lot Of 10Pcs

HYDAI UTH32H A4P20R THERMAL OVERLOAD RELAY RANGE 2.8-4.2A

HYDAI HITH22H N0003R THERMAL OVERLOAD RELAY RANGE 2-3A

HYDAI HITH22H N4P20R THERMAL OVERLOAD RELAY RANGE 2.8-4.2A

HYDAI HITH22H N0005R THERMAL OVERLOAD RELAY RANGE 3-5A

HYDAI HITH22H N0010R THERMAL OVERLOAD RELAY RANGE 7-10A

HYDAI HITH22H 13R THERMAL OVERLOAD RELAY RANGE 9-13A

HYDAI ELECTRIC HMX40NS AUXILIRY CONTACTOR VOLTAGE 220VAC

SIEMENS,3RV2901-1J, LATERAL CONTACT BLOCK FOR 3RV2, 2NC, 2NO.

TELEMECANIQUE RHZ21 RELAY BASE PLUG-IN SCREW TERMINALS NIB

Omron H3CR-A8 Timer 1.2s To 300h 100-240v-ac

ABB 1SAX121001R1103 EF 1.9-2.7 THERMAL OVERLOAD RELAY

ABB TEF5-ON ELECTRONIC TIMER VOLTAGE 220VAC

ABB TEF4-OFF ELECTRONIC ADD ON BLOCK TIMER VOLTAGE 220VAC

GE 666418 MT A V 500 372-620500 PANEL METER VOLTAGE 0V-500V

GE 666412 MT A A 30AMP CAPACITY 372-611030 METER VOLTAGE 220VAC

SCHNEIDER 18624 NG125N 25AMP 2POLE

FINDER 95.05 SPA RELAY BASE LOT OF 10PCS

FINDER 95.05 SPA RELAY BASE LOT OF 10PCS

SGHO LY-2SN RELAY 220VAC 8PIN LOT OF 10PCS

SCHNEIDER LR3D22 THERMAL OVERLOAD RELAY RANGE 16-24AMP

OMRON K8AB-PM2 ELECTRONIC TIMER VOLTAGE 440V AC

ALLEN BRADLEY 69A86 SPARE COIL VOLTAGE 110VAC

ALLEN BRADLEY 69A86 SPARE COIL VOLTAGE 110VAC

SCHNEIDER ELECTRIC LADR2 ADD ON CONTACTOR TIMER TIMING 0.1S-30S

SCHNEIDER ELECTRIC LRD07 THERMAL OVERLOAD RELAY RANGE 1.6-2.5A

SCHNEIDER ELECTRIC LRD14 THERMAL OVERLOAD RELAY RANGE 7-10AMP

SIEMENS C10A 1PN 10AMP 2POLE 440VAC 15KA

SIEMENS C6A 1PN 6AMP 2POLE 440VAC 15KA

SIEMENS C4A 1PN CIRCUIT BREAKER 4AMP 2POLE 440VAC 15KA

SIEMENS C2A 1PN CIRCUIT BREAKER 2AMP 2POLE 440VAC 15KA

SIEMENS C1A 1PN CIRCUIT BREAKER 1AMP 2POLE 440VAC 15KA

TELEMECANIQUE LR2K0314 THERMAL OVERLOAD RELAY RANGE 5.5-8A

ALLEN BRADLEY 100-SA10 AUXILIRY ADD ON CONTACTOR

SCHNEIDER RE11RAMU ELECTRONIC TIMER VOLTAGE 24VAC TO 240VAC

MOELLER ETR4-11-W ELECTRONIC TIMER VOLTAGE 24VAC TO 220VAC

PANASONIC TH639CE HOUR METER VOLTAGE 220VAC

M ELECTRONIC TIMER TIMING 0.6S-60MIN VOLTAGE 12-240VAC

Telemecanique LC1D1810P7 POWER CONTACTOR COIL VOLTAGE 220VAC

SIEMENS 3RP1513-1AP30-8K ELECTRONIC TIMER VOLTAGE 220VAC

GIC SERIES MICON 175 ELECTRONIC TIMER VOLTAGE 220V TO 440V AC

TELEMECANIQUE RE1-IC 312 OFF DELAY TIMER VOLTAGE 24VAC TO 240VAC

SIEMENS 3SU1051-6AA40-0AA0 INDICATOR LIGHT GREEN

RMNIPC CJX2-1810 POWER CONTACTOR 18AMP VOLTAGE 440VAC

RMNIPC JR36-20 THERMAL OVERLOAD RELAY RANGE 14-22AMP

TELEMECANIQUE ZCKE05 LIMIT SWITCH HEAD SENSOR

TYCO DHM-5B 517.050.603 DECKHEAD MOT

GE SURGE ARRESTER 667485 TELE OV-230 RELAY VOLTAGE 220VAC

HONEYWELL 242PC15M PESSURE SENSOR SQC2413

FUJI ELECTRIC SRC 50-4F/X AUXILIRY CONTACTOR VOLTAGE 100-110VAC

FUJI ELECTRIC SRC3631-5-1 MAGNETIC CONTACTOR 30AMP 100-110VAC

FUJI ELECTRIC SH-4/G AUXILIRY CONTACTOR COIL VOLTAGE DC24

FUJI ELECTRIC TR-1SN THERMAL OVERLOAD RELAY RANGE 2.8-4.2A

FUJI ST3P-F 60S CAPACITY ELECTRONIC TIMER VOLTAGE 110VAC

FUJI TR-5-1N/3 THERMAL OVERLOAD RELAY RANGE 12-18AMP

Schneider Contactor Side-Moted Auxiliary Contacts LAD8N11

FUJI ST3PA-A 3MINIT CAPACITY ELECTRONIC TIMER VOLTAGE 110VAC

EATON ETR4-51-A ELECTRONIC TIMER VOLTAGE 24VAC TO 220VAC

MULTISPAN MDT-4310 VOLTAGE 110VAC TO 240VAC

MITSUBISHI TH-T18 THERMAL OVERLOAD RELAY RANGE 5.2 TO 8AMP

ABB CA5-40E AUXILIRY CONTACT ADD ON BLOCK

ABB TMAX 1SDA051370R1 CHANGEOVER AUXILIRY WIRED T1 T2 T3

MITSUBISHI S-N12 MAGNETIC CONTACTOR 12AMP COIL VOLTAGE 110VAC

SPRECHERSCHUH CAT KT4-C2A-B10 CIRCUIT BREAKER RANGE 0.63-1AMP

MOELLER PKZM0-2.5 MOTOR PROTECTION CIRCUIT BREAKER RANGE 1.6-2.5AMP

SIEMENS 3RH1122-1AN20 AUXILIRY CONTACTOR 10A VOLTAGE 220VAC

SIEMENS 3RH1140-1BB40 AUXILIRY CONTACTOR 10A VOLTAGE 24VDC

SIEMENS 3RH1140-1AN20 AUXILIRY CONTACTOR 10A VOLTAGE 220VAC

SIEMENS 3RU1116-1AB1 THERMAL OVERLOAD RELAY 1.1-1.6AMP

TELEMECANIQUE LR1-D09303 THERMAL OVERLOAD RELAY RANGE 0.25-0.40AMP

SIEMENS 3UA52 00-0C THERMAL OVERLOAD RELAY RANGE 0.16-0.25AMP

FINDER 83.02.0.240.0000 ELECTRONIC TIMER VOLTAGE 24-240VAC/DC

OMRON H3BA-N ELECTRONIC TIMER 1.2S-300H VOLTAGE 220VAC

OMRON E2A-M18KS08-WP-C2 PROXIMITY SWITCH VOLTAGE 12-24VDC

SCHNEIDER LR2K0310 THERMAL OVERLOAD RELAY RANGE 2.6-3.7AMP

SCHNEIDER 9001KR1BH13 PUSHBUTTON OPERATOR BLACK 1NO/NC

SCHNEIDER 9001KR1RH13 PUSHBUTTON OPERATOR RED 1 NO/NC

SCHNEIDER LRD08 THERMAL OVERLOAD RELAY RANGE 2.5-4.0AMP

SCHNEIDER ELECTRIC LRD10 THERMAL OVERLOAD RELAY RANGE 4-6AMP

SCHNEIDER ELECTRIC LRD21 THERMAL OVERLOAD RELAY RANGE 12-18A

SCHNEIDER ELECTRIC LRD22 THERMAL OVERLOAD RELAY RANGE 18-24A

MITSUBISHI NF50-SP CIRCUIT BREAKER 15AMP 3POLE 220VAC 10KA

TELEMECANIQUE CA2DN22B6 AUXILIRY CONTACTOR 10A VOLTAGE 24VAC

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MATSUSHITA PM4HS-H-AC240 ATC22173 MULTIRANGE TIMER VOLTAGE 220VAC

OMRON H3DKZ-A2 ELECTRONIC TIMER VOLTAGE 24-240VAC

SIEMENS 3RU2116-1AB0 THERMAL OVERLOAD RELAYRANGE 1.10-1.60AMP

SIEMENS 3RU2116-0DB1 THERMAL OVERLOAD RELAYRANGE 0.22-0.32AMP

Omron MM2P Plug-in Relay 110VAC

ABB TA25DU-1.8 Thermal Overload Relay 1SAZ211201R1025

HYDAI HOKZE1 ELECTRONIC TIMER ADD ON CONTACTOR 220VAC

MEAN WELL POWER SUPPLY INPUT 110-240VAC OUTPUT 48VDC 0.32AMP

SCHNEIDER CAD32M7 AUXILIARY CONTACTOR VOLTAGE 220VAC

SCHNEIDER GZ1E32 MPCB RANGE 24-32 AMP

OMRON WLCA12-2-N INDUSTRIAL SNAP ACTION LIMIT SWITCH

ABB MS325 MOTOR PROTECTION CIRCUIT BREAKER RANGE 9-12.5AMP

SIEMENS 3RT1916-2ED ELECTRONIC TIMER VOLTAGE 220VAC

SCHNEIDER ELECTRIC LADN40 AUXILIRY CONTACT ADD ON BLOCK

RELPOL RPC-2MA-I ELECTRONIC TIMER VOLTAGE 12-240VAC/DC

TERASAKI TR-22 CONTROL RELAY AUXILIRY CONTACTOR VOLTAGE 220VAC

TCE012B01T POWER CONTACTOR 12AMP VOLTAGE 24VAC

ELTAKO S12-200 RELAY VOLTAGE 220VAC

ABB CA4-01 1SBN010110R1001 AUXILIRY CONTACT ADD ON BLOCK

OMRON H3Y-4 ELECTRONIC TIMER 60S TIMING VOLTAGE 24VDC

OMRON H3Y-4 ELECTRONIC TIMER 10S TIMING VOLTAGE 24VDC

OMRON H3Y-4 ELECTRONIC TIMER 3MIN TIMING VOLTAGE 24VDC

OMRON H3Y-4 ELECTRONIC TIMER 30MIN TIMING VOLTAGE 24VDC

OMRON H3Y-4 ELECTRIONIC TIMER 30S TIMING VOLTAGE 24VDC

DONGA DMC12B MAGNETIC CONTACTOR 12AMP COIL VOLTAGE 220VAC

HYDAI UTH32H A1P20R THERMAL OVERLOAD RELAY RANGE 0.8-1.2A

HYDAI UTH32H A2P10R THERMAL OVERLOAD RELAY RANGE 1.5-2.1A

HYDAI HITH22H N1P60R THERMAL OVERLOAD RELAY RANGE 1.1-1.6A

HYDAI HITH22H THERMAL OVERLOAD RELAY RANGE 0.5-0.7A

Schneider 9001KR1RH13 Push Button

ABB CA5-22E - 2 Pack of Auxiliary Contacts

EATON FAZ-D10/3 278892 10AMP 3POLE VOLTAGE 440VAC 15KA

ALLEN BRADLEY 100-D D140 CONTACTOR AUXILIRY NO/NC

ALLEN BRADLEY 100-C85 CONTACT KIT FIT FOR C85

AEG SH 5.22 AUXILIRY CONTACTOR VOLTAGE 220VAC

FERRAZ SHAWMUT CMS143 MODULAR FUSE BASE 50A 3POLE

SCHRACK ZR5E0011 ELECTRONIC TIMER VOLTAGE 240V AC

TOGAMI PAK-4HS22 MAGNETIC RELAY COIL VOLTAGE 220VAC

MERLIN GERIN MULTI9 27132 AUXILIARY

TELEMECANIQUE RHN 411B INST-RELAY 24VAC 50HZ  NIB RHN411B