采用模块化结构为了适应各种工业控制需要，除了单元式的小型 PLC 以外，绝大多数 PLC 均采用模块化结构。PLC 的各个部件，包括 CPU，电源，I/O 等均采用模块化设计，由机架及电缆将各模块连接起来，系统的规模和功能可根据用户的需要自行组合。

FANUC E0-3150-020-016 MACHINING CARRIER MOUNTING, LOT O

NAMCO EE510-92540 WFI HammerHead 9-WAY CONFIGURABLE PRO

MAC 6543A-00-PM-111?DA / PMD-111DAAG DIRECTIONAL CONTROL

FANUC EE-0989-120-004 P156 RJ ROBOT INTER CABLE 48 M, N

HOCKING ELECTRONICS HALEC MkII CRACK DETECTOR

ELCO ENTERPISES INC, WIRE WIZARD RW1024-C17U WIRE GUIDE

DOUBLE HOSE .25″ & .75″ 100 FT LENGTH,

ASCO 8211C93 SOLENOID VALVE, NNB

MURR ELEKTRONIK MVH8S-RNC10.0AC?TUATOR / SENSOR-BOX W/ C

ROSS 2771B4011 2/2 NORMALLY CLOSED SINGLE SOLENOID PILO

BALLUFF BIS C-6002-019-03-K?L2 COMPACT PROCESSOR

BALLUFF BIS C-6022-019-03-K?L2 COMPACT PROCESSOR

NIBCO T-301, BRONZE ANGLE VALVE, 2″ NPT, 175 PSI CWP, N

MAC 6521B-000-PM-11?1DA DIRECT SOLENOID PILOT OPERATED V

PARKER 80C-T06N HYDRAULIC HOSE DIE,

AEG OIC-422 COMMUNICATIONS ADAPTER USER’S MANUAL, LOT O

AUTOTRON A23100 PHOTOELECTRIC SENSOR, NIB