描述
光电传感器主要由发送器、接收器、检测电路三大部分构成。其中，发送器用于对准半导体光源、发光二极管、激光二极管、红外发射二极管等发出的目标光束;接收器又可分为光电二极管、光电三极管、光电池等，在接收器前面还装有透镜、光圈等光学元件，主要用于接收目标光束并将接收到的光信号转换为电信号;检测电路用于检测接收到的电信号并过滤出有效信号，将其传递至下一模块进行该电信号的实际应用。
Allen Bradley 1747-L551 SLC 500 Processor Unit
Allen Bradley 1747-L552 Allen Bradley SLC500 505 Processor Module
Allen Bradley 1747-L553 Allen Bradley SLC500 Processor Module
Allen Bradley 1747-M12 Allen Bradley Flash Memory Module
Allen Bradley 1747-OS501 SLC500 Processor Module
Allen Bradley 1747-PIC SLC 500 Personnal Computer Interface
Allen Bradley 1747-SDN Devicenet Scanner Module
Allen Bradley 1747-SN Remote I/O Scanner
Allen Bradley 1747-UIC Allen Bradley USB to DH485 Interface Converter
Allen Bradley 1747L532 SLC5/03 CPU 12K User Memory
Allen Bradley 1748-CP7A 9 Pin Connector
Allen Bradley 1756-CNB/D ControlLogix Control Net Communications Bridge
Allen Bradley 1756-DNB/A Allen Bradley Control Logix Communications Module
Allen Bradley 1756-ENBT Allen Bradley Communications Bridge
Allen Bradley 1756-HSC/A Allen Bradley High Speed Counter
Allen Bradley 1756-IB32 Control Logix 32 Channel 24VDC Input Module
Allen Bradley 1756-IF16/A AB ControlLogix 16 Channel Analogue Input Module
Allen Bradley 1756-IF8/A Allen Bradley ControlLogix 8Channel Input Module
Allen Bradley 1756-L1A Logix 5500 Processor Module
Allen Bradley 1756-L55/A Allen Bradley Logix 5555 Processor Unit
Allen Bradley 1756-M02AE/A 2 Axis Servo Module
Allen Bradley 1756-M1/A Allen Bradley ControlLogix Processor Unit
