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。

ALLEN BRADLEY 22B-D012N104 SER. A F/W 3.02 NSNP

Allen Bradley 25-ENC-1 /A 2020 PowerFlex 525 Incremental Encoder

Allen Bradley 25-ENC-2 /A PowerFlex 527 Incremental Encoder Input

Allen Bradley 25-ENC-2 /B 2021 PowerFlex 527 Incremental Encoder

Allen Bradley 25-ENC-2 /B PowerFlex 527 Incremental Encoder Input

ALLEN BRADLEY 2706-B21J16 SERVO MOTOR

ALLEN BRADLEY 2706-C21J8 SER. D REV. B (AS PICTURED) UNMP

Allen Bradley 2711C-T6M Panelview C600 Graphic Terminal

Allen Bradley 2711E-T10C6X Panelview 1000e Operator Interface Panel Ser D

Allen Bradley 2711P-B15C22D9P /A PanelView Plus 7 15" Performance Color Terminal

Allen Bradley 2711P-T10C4A9 Panelview Plus 1000 Operator Interface Panel Ser A

Allen Bradley 2711P-T10C6A2 Panelview Plus Operator Interface Panel 10.4in Ser A

Allen Bradley 2711P-T12C4D8 Panelview Plus 1250 Color Touch Display Module Ser A

Allen Bradley 2711P-T15C22D9P Panelview Plus 7 Operator Interface Panel Ser A

Allen Bradley 2711P-T15C22D9P Panelview Plus 7 Operator Interface Panel Ser B

Allen Bradley 2711P-T15C4A2 Panelview Plus 1500 Operator Interface Panel Ser A

Allen Bradley 2711P-T15C4A8 Panelview Plus Touch Input Color Panel Unit Ser A

Allen Bradley 2711P-T6C5D8 /A PanelView Plus 6 600 5.7" 512MB Flash Terminal

Allen Bradley 2711P-T7C22A9P /A PanelView Plus 7 Performance Color 7" Terminal

Allen Bradley 2711P-T9W22A9P /A PanelView Plus 7 Color Touch 9" 100-240V

Allen Bradley 2711P-T9W22D9P Ser B PanelView Plus 7 9" Terminal

Allen Bradley 2711R-T7T /B PanelView 800 7" DC Touch Screen HMI

Allen Bradley 2711-T10C1X Panelview 1000 Operator Interface Panel Ser F

ALLEN BRADLEY 2711-T10G10 SER B FRN: 4.20

ALLEN BRADLEY 2711-T10G8 SERIES A REV E FRN 3.30

ALLEN BRADLEY 2711-T10G8 SERIES E FRN 4.48 (REMANUFACTURED)

Allen Bradley 2711-T10G9 Panelview 1000 Operator Interface Panel Ser D

Allen Bradley 2711-T14C1 Panelview 1400 Operator Interface Panel Ser B

Allen Bradley 2711-T5A2L1 /A PanelView 550 5.5" Monochrome Touchscreen Terminal

Allen Bradley 2711-T6C20L1X Panelview 600 Operator Interface Panel Ser B

Allen Bradley 2711-T9C3 /C PanelView 900 9" Color/Touchscreen AC Power Terminal

Allen Bradley 2715P-T12WD /A PanelView 5510 Operator Terminal

Allen Bradley 2715P-T19CD Ser A PanelView 5510 19" Color/Touch Operator Terminal

Allen Bradley 2715P-T7WD /A PanelView 5510 7" Operator Terminal

Allen Bradley 294E-FD2P5P-G2-3 /A ArmorStart Motor Controller

ALLEN BRADLEY 42305-073-51 REV.A DRIVE FRN 6.01EN (AS PICTURED)

Allen Bradley 42AF-B1MAC1-D4 /A RightSight Photoelectric Sensor

ALLEN BRADLEY 42BT-B1LBSN-Y4 SER. A PHOTOELECTRIC SENSOR

ALLEN BRADLEY 42CB-P2LNA-M4 SER. A UNMP

Allen Bradley 42EF-B1SCBC-A2 /A Photoelectric Sensor 50mm

Allen Bradley 42EF-B1SCBE-A2 /A PHOTOSWITCH Photoelectric Sensor

Allen Bradley 42EF-C2SCA-A2 /A PHOTOSWITCH Photoelectric Sensor 1m

ALLEN BRADLEY 42EF-P2MNB-Z15 SER. A 11-30VDC NSMP

ALLEN BRADLEY 42EF-P2MNB-Z15 SER. D 11-30VDC NSMP

Allen Bradley 42EF-P2MPB-F4 /D PHOTOSWITCH RightSight 3m Sensor

ALLEN BRADLEY 42EF-P2RCB-G4 SER. A 20-264VAC/DC (AS PICTURED) NSMP

ALLEN BRADLEY 42EF-P2SFB-A2 PHOTOELECTRIC SENSOR SER. A UNMP

Allen Bradley 42EF-S1MPA-F4 Series D PHOTOSWITCH 100mm Sensor

ALLEN BRADLEY 42FB-F2LNAQ-A2 SER. A NSMP

ALLEN BRADLEY 42FB-F2LNAQ-A2 SER. A NSNP

ALLEN BRADLEY 42FB-F2LPAQ-A2 SER. A SENSOR (MISSING ACCESSORIES)

ALLEN BRADLEY 42GNC-9210-QD1 SER. A UNMP

ALLEN BRADLEY 42GNU-9200-QD SER. A POHOTOELECTRIC SENSOR

ALLEN BRADLEY 42GRC-9202-QD SER. A 70-264VAC 2A UNMP

ALLEN BRADLEY 42GRF-9100-QD SER. A 10-40VDC (BK/YL) NSMP

ALLEN BRADLEY 42GRF-9100-QD SER. A 10-40VDC (WH) NSMP

ALLEN BRADLEY 42GRL-9000 SER. A 10-264VDC/VAC (WH) NSMP

ALLEN BRADLEY 42GRL-9000-4 SER. A 10-264VAC/DC (BR/YL) NSMP

ALLEN BRADLEY 42GRP-9003 SER. A PHOTOSWITCH PHOTOELECTRIC SENSOR

ALLEN BRADLEY 42GRP-9041-QD SER. A 264VAC 2A UNMP

Allen Bradley 42GRU-9202 /B Photoelectric Sensor 70-264VAC 16ft

Allen Bradley 42GRU-92L0-QD /B PHOTOSWITCH LaserSight 9000 40m

ALLEN BRADLEY 42GRU-92L0-QD SER. B 10-30VDC NSMP

ALLEN BRADLEY 42GTC-9202 SER. A 264VAC 1A UNMP

ALLEN BRADLEY 42GTU-9200-QD SER. A 10-40VDC NSMP

ALLEN BRADLEY 42KB-U2LPSN-Y3 SER. A 12-24VDC (WH) NSMP

ALLEN BRADLEY 42KRU-9000-QD UNMP

ALLEN BRADLEY 42MRL-5000 SER. B (BR/YL) NSMP

ALLEN BRADLEY 42RLP-4000B SER. B 120-240VAC 2.5-5A (W/O RELAY) UNMP

ALLEN BRADLEY 42RLU PHOTOELECTRIC SENSOR

Allen Bradley 42RLU-4000B /B PhotoSwitch Photoelectric Sensor 10.6M

ALLEN BRADLEY 42SRP-6023 SER. B 10-30VDC NSMP

ALLEN BRADLEY 42SRP-6036 SER. B UNMP

ALLEN BRADLEY 42SRU-6007 SER. B SENSOR

Allen Bradley 42SRU-6202 Series B PHOTOSWITCH 6000 3m Sensor

ALLEN BRADLEY 43GR-TBB25ML FIBER OPTIC CABLE SER. A

ALLEN BRADLEY 43GR-TMC15ML SER. A FIBER OPTIC CABLE

ALLEN BRADLEY 440F-M1515 SENSOR MAT

Allen Bradley 440L R4KL0960YD Light Curtain Receiver 960mm

Allen Bradley 440L-AM0751650 Guardmaster Guardshield Corner Mirror

ALLEN BRADLEY 440L-P4B0450-N SERIES A PAIR TRANSMITTER & RECEIVER

ALLEN BRADLEY 440L-R4B0900-N RECEIVER

Allen Bradley 440L-R4F0020-Q Light Curtain Receiver 24v-dc

Allen Bradley 440L-R4F0020-QA Guardmaster Safety Beam

Allen Bradley 440L-R4J1280YD 440L-T4J1280YD Light Curtain Set 24v-dc

Allen Bradley 440L-R4J1760YD 440L-T4J1760YD Light Curtain Set 24v-dc

Allen Bradley 440L-R4K0960YD 440L-T4K0960YD Light Curtain Set 24v-dc

Allen Bradley 440L-R4K1280YD 440L-T4K1280YD Light Curtain Set 24v-dc

Allen Bradley 440L-R4K1280YD Light Curtain Receiver 24v-dc

Allen Bradley 440L-R4KL1120YD Guardmaster Light Curtain Receiver 24v-dc

Allen Bradley 440L-T4K1280YD Light Curtain Transmitter 24v-dc

Allen Bradley 440L-T4KL0960YD Guardshield Light Curtain Transmitter

Allen Bradley 440L-T4KL1120YD Guardmaster Light Curtain Transmitter 24v-dc

Allen Bradley 440N-Z21S26H /B SensaGuard 18mm Sensor/Actuator

Allen Bradley 442G-MABLB-UL-E0P49 Series A Multifunctional Access

Allen Bradley 442L-SFZNSZ A Safezone Singlezone Safety Laser Scanner

Allen Bradley 442L-SZNCPMOD /A 3 CIP Safety Laser Scanner System Plug

Allen Bradley 445L-P2S2500YD Guard Master Light Curtain

Allen Bradley 445L-P4E0300FP 30mm Res 300mm Light Curtain Pair

Allen Bradley 445L-R4E0600FP 30mm Resolution 600mm Light Curtain Pair

ALLEN BRADLEY 47SN1-4001 PHOTOSWITCH SENSOR

ALLEN BRADLEY 47SN1-4001 RECEIVER SENSOR SWITCH  IN ORIGINAL PACKAGE

ALLEN BRADLEY 500L-BAD93 STARTER MOTOR ENCLOSURE ONLY

ALLEN BRADLEY 509-AOA SER. A MOTOR STARTER 115-120V

ALLEN BRADLEY 509-CAB SER A MAGNETIC MOTOR CONTROLLER

ALLEN BRADLEY 512-BSB-24R SERIES B COMBINATION MOTOR STARTER

ALLEN BRADLEY 5370-CVIM2 SER. A 24V 9.00A UNMP

Allen Bradley 60-2730 /A PHOTOSWITCH Series 9000 Photoelectric Sensor

Allen Bradley 6180P-15BSXP Industrial Computer Ser D

Allen Bradley 6180P-15BSXP Industrial Computer Ser E

Allen Bradley 6181P-17TPXPH /B VersaView 1700P Display Computer Scratches

ALLEN BRADLEY 6182H-15TEH4B SERIES A TOUCH SCREEN

Allen Bradley 6189-RDT10C /A Color Touch 10.4-in VersaView CE Display Module

Allen Bradley 6189-RDT12C Versaview Ce 1250 Color Touch Display Module Ser C

ALLEN BRADLEY 634571-02 REV. A UNMP

ALLEN BRADLEY 713-AUB5023 SER. B EXPLOSION PROOF MOTOR

Allen Bradley 80026-520-01-R /1 Switching Power Supply 48VDC 22A

ALLEN BRADLEY 802PR-LAAA1 SER. C (BK/GD) NSMP

ALLEN BRADLEY 802PR-LAAB1 SER. C 102-132VAC 10A (WH) NSMP

Allen Bradley 802PR-LAAJ3 Ser C Proximity Sensor 2-Wire AC

ALLEN BRADLEY 802PR-LBAM1-12 SER. A INDUCTIVE PROXIMITY SENSOR

Allen Bradley 836E-DC1EU3-D4 /A Solid-State Pressure Condition Sensor Qty

Allen Bradley 842E-CM-MIP2BA /A Absolute Encoder Ethernet/IP 3/8in Shaft 18-Bit

Allen Bradley 842E-MIP10BA /B EtherNet Multi-Turn Absolute Encoder

Allen Bradley 842E-MIP10BA Ser B ENet 18-Bit Multi-Turn Absolute Encoder

ALLEN BRADLEY 844D-B5CCIDS SERIES A ENCODER

Allen Bradley 844D-B6A12FW Through-shaft Optical Incremental Encoder

ALLEN BRADLEY 844D-B9BC2FS SER. A ENCODER

Allen Bradley 845A-SJZ3DN6DW Absolute Optical Encoder

ALLEN BRADLEY 845A-SJZ3DN6DW SER A ENCODER

Allen Bradley 845C-SJZ3DL3AK3 Optical Encoder Programmable Controller

ALLEN BRADLEY 845C-SJZ4DL3AK3 ENCODER