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。

REXROTH MOD 13 / 1X0041-001 PROGRAMMING MODULE, NIB

SEW EURODRIVE 5 METER CONTROL CABLE 817 533 0

SCHNEIDER TSX MOMENTUM 24VDC I/O BASE 170 ADM 390 30

SUNX NPS-C7 SENSOR CONTROLLER UNIT, NIB

ALLEN BRADLEY 42BT-B2LBSL-F4 SERIES A PHOTOSWITCH, NNB

ALLEN BRADLEY 42BT-B2LBSL-F4 SERIES A PHOTOSWITCH, NIB

BUSSMANN FRS-R-4/10, FUSETRON FUSE, 600 V, 4/10 A, 300

LENOX, LNX-91023,NEO-T?YPE BAND SAW BLADE,10′ 5″ LENGTH,

MASTER PNEUMATIC A60045 1/2″ NPTF SINGLE POINT LUBRICAT

ELECTROCUBE RG1986-6 CAPACITOR, 0.50 MFD, 600 V, 1/2 WA

GENERAL ELECTRIC, RTN1C, OVERLOAD RELAY, 0.25-0.41 A, 6

APE INC, 66-ANB-3, BUTTERFLY VALVE, 200 PSI, SIZE 6″

SICK INTELLIFACE SAFETY RELAY UE 43-6MF2D3

TRI LITE DL-40, DOCK LOADING LIGHT, 40″ ARM LENGTH, 150