PLC控制系统的分类
（一）、集中式控制系统
集中式控制系统是用一个PLC控制一台或多个被控设备。主要用于输入、输出点数较少，各被控设备所处的位置比较近，且相互间的动作有一定联系的场合。其特点是控制结构简单。
（二）、远程式控制系统
远程式控制系统是指控制单元远离控制现场，PLC通过通信电缆与被控设备进行信息传递。该系统一般用于被控设备十分分散，或工作环境比较恶劣的场合。其特点是需要采用远程通信模块，提高了系统的成本和复杂性。
（三）、分布式控制系统
分布式控制系统即采用几台小型PLC分别独立控制某些被控设备，然后再用通信线将几台PLC连接起来，并用上位机进行管理。该系统多用于有多台被控设备的大型控制系统，其各被控设备之间有数据信息传送的场合。其特点是系统灵活性强、控制范围大，但需要增加用于通信的硬件和软件，系统的复杂性也更大。
1756IH16I 1756-IH16I ControlLogix 16 Point D/I Module
1756ENBT 1756-ENBT ControlLogix Enet/IP Comms Module
1756OB16IS 1756-OB16IS ControlLogix 16 Point D/O Module
1756OB16DK 1756-OB16DK ControlLogix 16 Point Digital Output
1756PBXTR 1756-PBXTR Extended Temp DC Redundant Supply
1756TBS6H 1756-TBS6H ControlLogix 36 Pin Spring TRM Block
1756OB16EK 1756-OB16EK ControlLogix 16 Point Digital Output
1756PB75K 1756-PB75K ControlLogix DC Power Supply
1756L72 1756-L72 ControlLogix 4 MB Controller
1756CPR2D 1756-CPR2D ControlLogix Redundant Supply Cable Down
1756L73XT 1756-L73XT ControlLogix 8MB Controller L7XT
1756L73 1756-L73 ControlLogix 8 MB Controller
1756L62S 1756-L62S GuardLogix 4 MB Standard Mem Controller
1756RM2 1756-RM2 ControlLogix Redundancy Enhanced Module
1756PLS 1756-PLS ControlLogix Prog Limit Switch Module
1756L62 1756-L62 ControlLogix 4 MB Memory Controller
1756A7XT 1756-A7XT ControlLogix 7 Slots XT Chassis
1756CNBRK 1756-CNBRK ControlLogix Communication Module
1756PSCA2K 1756-PSCA2K ControlLogix Adaptor
1756BA1 1756-BA1 ControlLogix FlexLogix Battery
1756L73SXT 1756-L73SXT Logix 5573SXT Automation Controller 8/4M
1756IN16 1756-IN16 ControlLogix 16 Pt D/I 24V AC Module
1756L72EROMS 1756-L72EROMS ArmorGuardLogix On Machine Safety Contro
1756A7K 1756-A7K ControlLogix 7 Slot Chassis
1756IF8K 1756-IF8K ControlLogix 8 Point Analog Input
1756L63 1756-L63 ControlLogix 8 MB Memory Controller
1756EN2F 1756-EN2F ControlLogix Enet/IP Fiber Optic Module
1756PSCA2XT 1756-PSCA2XT Extended Temp Redundant Supply Adapter
1756OF8IH 1756-OF8IH ControlLogix 8 Pt A/O HART Isolated
1756CPR2U 1756-CPR2U ControlLogix Redundant Supply Cable Up
1756L71K 1756-L71K ControlLogix 2 MB Controller
1756OB16IEF 1756-OB16IEF ControlLogix 16 Point Digital Output
1756IRT8I 1756-IRT8I ControlLogix 8 Point RTD/Thermocouple In
1757SRC3 1757-SRC3 System Redundancy Module
1756L63XT 1756-L63XT ControlLogix XT 8 MB Memory Controller
1756IF16H 1756-IF16H ControlLogix 16 Pt A/I HART Module
1756CN2RXT 1756-CN2RXT ControlLogix Temp ControlNet Module
1756L7SP 1756-L7SP Logix L7SP SIL 3 PLe Safety Partner
1756M02AS 1756-M02AS ControlLogix Analog SSI Motion Module
1756ESMNRMK 1756-ESMNRMK ControlLogix Energy Storage Module NRM
1756IF8I 1756-IF8I ControlLogix 8 Point Analog Input
1756PAR2K 1756-PAR2K 85-265VAC REDUNDANT POWER SUPPLY ASSEMBL
1756IB16I 1756-IB16I ControlLogix Input Module
1756L73K 1756-L73K ControlLogix 8 MB Controller
1756IF8H 1756-IF8H ControlLogix 8 Point A/I HART Module
1756ESMCAPXT 1756-ESMCAPXT L7XT Energy Storage Module-Capacitor
1756IA16K 1756-IA16K ControlLogix 16 Point Digital Input
1756IG16 1756-IG16 ControlLogix 16 Pt 5VDC D/I Module
1756OV32E 1756-OV32E ControlLogix 32 Point D/O Module
1756EN2TSC 1756-EN2TSC EtherNet/IP Hi Prof Sngl Port
1756OF6CI 1756-OF6CI ControlLogix 6 Pt Isolated Module
1756L71S 1756-L71S Logix 5571S Automation Controller 2/1M
1756A17 1756-A17 ControlLogix 17 Slots Chassis
1756JMPR 1756-JMPR ControlLogix Jumper Bar
1756ESMNSE 1756-ESMNSE ControlLogix Energy Storage Module
1756ON8 1756-ON8 ControlLogix 8 Point D/O Module
1756EN2TR 1756-EN2TR 2-PORT CLX HI-CAP ENET/IP MODULE - TP
1756EN3TR 1756-EN3TR ControlLogix Ethernet Motion Module
1756N2 1756-N2 ControlLogix Empty Slot Cover
1756OB32K 1756-OB32K ControlLogix 32 Point Digital Output
1756PBXT 1756-PBXT ControlLogix 24V DC XT Power Supply
1756L7SPK 1756-L7SPK Logix L7SP SIL 3 PLe Safety Partner
1756A7 1756-A7 ControlLogix 7 Slots Chassis
1756IT16 1756-IT16 ControlLogix 16 Pt TC Input Module
1756L73SK 1756-L73SK Logix 5573S Automation Controller 8M/4M
1756EN2TK 1756-EN2TK CLX HI-CAP ENET/IP MODULE - TP
1756IB16IFK 1756-IB16IFK ControlLogix 16 Point Digital Input
1756L71 1756-L71 ControlLogix 2 MB Controller