如果应用中，将PLC机架中类似的模块组合到一起，有助于保持配线隔离。例如，一个机架只包含交流模块，另一不同的机架只包含直流模块，对每个机架近-一步分组为输入和输出类型。对于小型系统，举个例子，机架的左端可以是模拟量模块，中间为直流模块，右端为交流模块。

FAFNIR 2MM9110WI DUM SUPER PRECISION BEARING SET, NIB

SQUARE D HU461AWKEI HEAVY DUTY SWITCH, 30 Amp SINGLE TH

COXREELS TSH-N-550 SUPREME DUTY HOSE REELS, TRUCK MOUNT

COXREELS TSH-N-550 ? SUPREME DUTY HOSE REELS, TRUCK MOU

OPW SURE SEAL 800 SERIES BUTTERFLY VALVE 12″,

SEW EURODRIVE R60DT100LS4BM64?HR HELICAL GEARMOTOR, RATI

SEW EURODRIVE KA37A HELICAL GEAR, RATIO 125.91:1

KOHLER 5016-ET-0 DEXTER URINAL, NIB

PARKER 06.00CDD2AUS13 12.000 SERIES 2A HEAVY DUTY PNEUM

OPW SURE SEAL 800 SERIES BUTTERFLY VALVE 10″,

CRANE CENTERLINE RESILLIENT SEATED BUTTERFLY VALVE, 6″,

WESTINGHOUSEAC AC INDUCTION MOTOR, 5 Hp, Frame: 254, RE

SEW EURODRIVE R60 DT100LS 4B HELICAL GEARMOTOR, RATIO 1

IMPACT WELDING ARCAgent2000 WELD MONITOR

STANLEY A40LRA-5 3/8″ DRIVE ANGLE PNEUMATIC NUT RUNNER

STANLEY A33LRRA3CT-3 3/8″ DRIVE ANGLE PNEUMATIC NUT RUN

STANLEY A40LA-6 3/8″ DRIVE ANGLE PNEUMATIC NUT RUNNER