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。

1   Allen Bradley 1771-OFE2 /B Bulletin 1771 Analog Output Module 5VDC 1.4A

 SEALED Allen Bradley 1792D-8BVT0D /B DeviceNet I/O Input Block 8-Source In

Allen Bradley 1746-OX8 /A SLC 500 8-Point Isolated Relay Digital Output Module

 Allen Bradley 1746-OX8 /A SLC 500 8-Point Isolated Relay Digital Output Module

 Reliance Electric 0-55320 Printed Circuit Board DV/DT Card 460V

Automation Direct D2-16TD2-2 16-Point Output Module W/Removable Terminal Block

Allen Bradley 1746-NT4 /B SLC 500 Thermocouple /mV Input Module FRN: 2

Mitsubishi A1SD59J-S2 MelSec Memory Card Interface Module I/F Unit

Allen Bradley 1746-OB16 /D SLC 500 16-Point Output Module READ

Siemens 505-4832 Digital Output Module 85-256VAC

Infosight Corporation ITM12926 Header Conversion Card 94V-0

Allen Bradley 1734-OV8E /C Point I/O 8-Pt Digital Output Module FW: 3.022

Allen Bradley 1734-OB8S /B Point I/O DC Safety Sourcing Output Module 8-Pt 24VDC

Allen Bradley 1756-M08SE /B ControlLogix 8-Axis Sercos Interface Module READ

1  Allen Bradley 1756-M08SE /B ControlLogix 8-Axis Sercos Interface Module READ

LOT OF FIVE Opto 22 OAC24 G1 I/O AC Digital Output Module 12-140VAC 24VDC

 SEALED Allen Bradley 1785-O5E /A PLC-5 802.3 OSI Interface Module

Mitsubishi A1SY10 MelSec Output Module 24VDC 16Point 2 Amp 240VAC

 Mitsubishi A1SY10 MelSec Output Module 24VDC 16Point 2 Amp 240VAC

Allen Bradley 1771-OZC /B Contact Output Module 12-Point Terminal 150VAC 100VDC

B&R Automation 7AT664.70 4-Input Thermocouple Analog Input Module

Allen Bradley 1734-IE4S /A Point Guard I/O Safety Analog Input Module 4-Ch

Omron CJ1W-OD232 CJ Series Digital Output Unit 3 Transistor Outputs 24VDC

 SEALED Siemens 6ES7 331-7KB02-0AB0 Simatic Analog Input Module SM331

Allen Bradley 1746-IA16 /C SLC 500 16-Point Digital AC Relay Input Module

 Allen Bradley 1746-IA16 /C SLC 500 16-Point Digital AC Relay Input Module

Allen Bradley 1794-IB16 /A Flex I/O Digital Sink Input Module 16-Point 24VDC

 Allen Bradley 1794-IB16 /A Flex I/O Digital Sink Input Module 16-Point 24VDC

Reliance Electric 45C944 Shark Input Module DC Sink 8-Point

Fuji Electric NP1Y16R-08 Digital Output Module Relay Contact 30VDC 240VAC

TESTED Allen Bradley 1769-IQ16 /A Compact I/O 16-PT Digital Input Module

 TESTED Allen Bradley 1769-IQ16 /A Compact I/O 16-PT Digital Input Module

 Allen Bradley 1771-IAN /A PLC-5 AC Input Module 120V

Reliance Electric 45C961 Shark 16-Point Output Module

 SEALED Allen Bradley 5069-OB8 /A Logix 5000 Compact 5000 DC Output Module

B&R Automation 3CP360.60-1 Pentium 266 CPU Module W/Compact Flash 128MB READ

 SEALED Allen Bradley 1784-CF128 /A Industrial CompactFlash Memory Card 128MB

  SEALED Allen Bradley 1784-CF128 /A Industrial CompactFlash Memory Card 128MB

 Fuji Electric UG03I-S Communication Interface Unit (SX Bus)

 Allen Bradley 1771-NIV /B 8-Point Analog Input Frn H

 SEALED Allen Bradley 20D-STEG-B1 Bulletin 20D High Resolution Encoder

Omron CJ1W-OD212 CJ Series Digital Output Unit 24VDC Screw Term 16-Outputs

Siemens 6ES7 322-1BL00-0AA0 Simatic S7 Digital Output Module 24VDC 32-Outputs

1  Siemens 6ES7 322-1BL00-0AA0 Simatic S7 Digital Output Module 24VDC 32-Outputs

Fuji Electric NP1X1606-W Digital Input Module 16-Points 24VDC 35MA

TESTED Allen Bradley 1762-IA8 /A MicroLogix 1200 8-Pt Input Module 120VAC READ

1  TESTED Allen Bradley 1762-IA8 /A MicroLogix 1200 8-Pt Input Module 120VAC READ

Fuji Electric NP1AX04-MR Analog Input Module 4-Channel 24VDC 10MA

AMK AZ-EA24 Input Module W/ 2- 25 Position Female Connectors Rev 2.00

GE Fanuc IC694MDL655B Input Module 32 Point 24VDC

Allen Bradley 1746-NI4 /A SLC 500 4-Channel Analog Input Module

Omron CJ1W-ID262 CJ Series Digital Input Unit 6 High Speed Inputs 24VDC

Allen Bradley 1746-OB16 /D SLC 500 16-Point Output Module

 Allen Bradley 1746-OB16 /D SLC 500 16-Point Output Module

Allen Bradley 1734-IE2C /C Point I/O 2-Pt Analog Input Module FW: 3.004

 SEALED Allen Bradley 1492-CM800-LD005 /A ControlLogix Conversion Module

Fuji NP1X1610 Digital Input Module 100/120V 10MA

Fuji Electric NP1Y16R-08 Digital Output Module Relay Contact 30VDC 240VAC READ

Siemens 6ES7 321-1BL00-0AA0 Simatic S7 Digital Input Module 32-Inputs READ

Opto 22 PB32HQ Digital I/O Circuit Board Card

Allen Bradley 1794-OB16P /A Flex I/O 24VDC Source Output Module w/1794-TB3

 Allen Bradley 1794-OB16P /A Flex I/O 24VDC Source Output Module w/1794-TB3

TESTED Allen Bradley 1762-OB16 /A MicroLogix 1200 Output Module

 TESTED Allen Bradley 1762-OB16 /A MicroLogix 1200 Output Module

 Allen Bradley 1738-OW4M12 /A ArmorPoint I/O Discrete Output Module 30VDC 2A

 Automation Direct D4-16TR DirectLOGIC DL405 Relay Output Module 16-Pt

B&R Automation 7DI135.70 DI135 Digital Input Module 4-Inputs 24VDC 8mA 50kHz

 Allen Bradley 1769-OB32T /A Compact I/O 32-Pt Digital Output Module

TESTED Allen Bradley 1761-NET-ENI /C EtherNet/IP Ethernet Interface Module

 TESTED Allen Bradley 1761-NET-ENI /C EtherNet/IP Ethernet Interface Module

Allen Bradley 1794-IV16 /A Flex I/O Input Module 16 Point 10/31VDC

 Reliance Electric 45C963 Shark Programmable Output Controller 16 Point 24VDC

AGV Products Inc OC-21 Input Module 4X VGA Inputs

TESTED Allen Bradley 1762-IR4 /A MicroLogix 1200 4-Chnnl Resistance Input Module

Allen Bradley 1756-IB16 /A ControlLogix 16-Point D/I Module FW 3.3

 Allen Bradley 1756-IB16 /A ControlLogix 16-Point D/I Module FW 3.3

B&R Automation 7DI439.7 DI439 Digital Input Module 24VDC 16-Inputs 4mA

 Allen Bradley 1771-ID16 /B Bulletin 1771 Input Module Isolated 120VAC/VDC

B&R Automation 7AO352.70 AO352 Analog Output Module 2-Outputs 10V 20mA

Fuji NP1AY02-MR Analog Output Module 2-Channel Read

Automation Direct D2-04TD1 Discreet Output Module 4-Point 12-24VDC READ

Allen Bradley 1794-OB16 /A Flex I/O 16 Pt Digital Output Module W/1794-TB2 /A

Allen Bradley 1769-OW8 /B Compact I/O 8-Pt Digital Output Relay Module

Allen Bradley 1791D-0B16PX /D CompactBlock I/O Output Expansion Block Module

TESTED Allen Bradley 1762-IQ16 /A MicroLogix 1200 16-Channel Input Module

 TESTED Allen Bradley 1762-IQ16 /A MicroLogix 1200 16-Channel Input Module

TESTED Allen Bradley 1794-OV16 /A Flex I/O Sinking Output Module 24VDC 500mA

Siemens 6ES7 321-7BH01-0AB0 Simatic S7 Digital Input Module 24VDC 16-Outputs

Mitsubishi FX-8EX-ES/UL 8-Point Extension Input Block Sink/Source 24VDC

 Allen Bradley 1794-OA16 /A Flex I/O 16-Pt Digital Output Module 120VAC

Allen Bradley 1746-OX8 /A SLC 500 SLC 8-Point Digital Output Module READ

 Allen Bradley 1746-OX8 /A SLC 500 SLC 8-Point Digital Output Module READ

Siemens 6ES7124-1GA00-0AB0 Simatic SC Electronic Analog Output Sub Module

Automation Direct D4-16TD2 Output Module 12-24v-dc

Mitsubishi FX-2DA Analog Output Module 24VDC 2-Point 12-Bit

1  Mitsubishi FX-2DA Analog Output Module 24VDC 2-Point 12-Bit

Allen Bradley 1746-OB8 /A SLC 500 Output Module 10-50VDC

LOT OF FOUR Siemens 6ES7 131-4BD01-0AA0 Simatic S7 Digital Input Module

Reliance Electric 45C946 SharL Input Module 16-Point 24VDC

Allen Bradley 1746-IB32 /D SLC 500 32-Channel Digital Input Module

 SEALED Allen Bradley 1771-IA /C PLC-5 Input Module

Reliance Electric 45C964 Output Module 24VDC

 IFM AC5213 AS-Interface ClassicLine Digital Output Module 4DO-Y

LOT OF 2 Allen Bradley 1746-IA16 /C SLC 500 16-Point AC Relay Input Module

LOT OF 2 Allen Bradley 1746-IB16 /C SLC 500 16-Point Relay Input Module

Mitsubishi FX-16EYT-ESS Transistor Block Output Module 0.5A 5/30VDC

Siemens 6ES7 131-4BF00-0AA0 Simatic S7 8-Pt Digital Input Module 24VDC

Allen Bradley 1746-OG16 /B SLC 500 Output Module 16PT

 Allen Bradley 1746-IV32 /D SLC 500 32 Channel Digital Input Module

 GE Fanuc IC200MDL640F VersaMax 16Pt Input Module POS/NEG Grouped 24VDC

Allen Bradley 1734-OA4 /C Point I/O 4-Pt Digital Output Module FW: 3.022

Siemens 6ES7 132-4BF00-0AA0 Simatic S7 8-Pt Digital Output Module 24VDC

1  Siemens 6ES7 132-4BF00-0AA0 Simatic S7 8-Pt Digital Output Module 24VDC

Automation Direct D4-08TD1 Direct Logic Relay Output Module 12-24VDC

LOT OF TWO Allen Bradley 1771-IA AC Input Module 8-Point 50/60Hz 7MA 120V

Siemens 3RK1200-0CE00-0AA2 AS-Interface Module 4 Digital Inputs

Allen Bradley 1746-OV32 /C SLC 500 Transistor Output Sinking Module

1  Allen Bradley 1746-OV32 /C SLC 500 Transistor Output Sinking Module

Allen Bradley 1794-IB16 /A Flex I/O 24VDC Input Module W/1794-TB3S Terminal Base

 Allen Bradley 1794-IB16 /A Flex I/O 24VDC Input Module W/1794-TB3S Terminal Base

GE Fanuc IC694MDL645A Input Module 24VDC 16Pt Grouped Pos/Neg

 SEALED Allen Bradley 5069-IF8 /A Logix 5000 Compact 5000 Analog Input Module

Reliance Electric 45C941 Input Module Programmable Controller 115/230VAC

Automation Direct D4-16ND2 Discrete Input Module 12-24VDC

Siemens 505-4232 Digital Input Module 32-Point 79/132VAC

Automation Direct D2-04TRS Relay Output Module 4-point Removable Terminal Block

Lot Of 2 Allen Bradley 1746-IA16 /B SLC 500 16-Point Digital AC Input Module

Spectrum Controls 1746sc-IB8I /A SLC 500 8-Point Isolated 24VDC Input Module

Allen Bradley 1791D-OB16P /D CompactBlock I/O Output Block

Allen-Bradley 1771-OFE2 /B PLC-5 Analog Output Module 4 Point

1  Allen-Bradley 1771-OFE2 /B PLC-5 Analog Output Module 4 Point