输入输出设备：它用以接收信号或输出信号，便于与PLC进行人机对话。输入的有条码读入器，输入模拟量等。输出的有打印机、编程器、监控器虽也可对PLC输入信息，从PLC输出信息，但输入输出设备实现人机对话更方便，可在现场条件下实现，并便于使用。随着技术进步，这种设备将更加丰富。
ALLEN BRADLEY DRIVE 1336E-BRF20-AN-EN-HA2-L4 SER D
PARKER GEARBOX GTN
FANUC PLC MODULE A03B-0819-C052
ALLEN BRADLEY 2711-B6C8 Panelview
SIEMENS SERVO MOTOR 1FK7042-5AF71-1TA5
MAGNETEK DRIVE 71616-G3M40301
ALLEN BRADLEY ULTRA3000 DRIVE 2098-DSD-030-SE PART NO: SER B
SIEMENS SERVO MOTOR 1FK7040-5AK71-1GB3
ALLEN BRADLEY SERVO MOTOR MPL-A330P-SJ22AA
SIEMENS SERVOMOTOR 1FT6086-8AC71-3EB2
ALLEN BRADLEY PANELVIEW 600 2711-T6C20L1
GE ADJUSTABLE SPEED DRIVE 7VFXX005CD02
BOARD Z
CONTROL TECHNIQUES SERVO MOTOR MGM-208-CONS-0000
SIEMENS 3 PHASE BRUSHLESS SERVO MOTOR 1FT6064-6AF71-3AG1
WEST INSTRUMENTS CONTROL MODULE DIGITAL DISPLAY N6100-Z320000 S14
SIEMENS SIMODRIVE 2x25A 6SN1124-1AB00-0BA2
SIEMENS SERVO MOTOR 1FK7080-5AH71-1GH3
GRACO REGULATOR P20-VM
STOBER POSIDRIVE FDS 4000 FDS4110/B
FANUC MDI/CRT UNIT A02B-0063-C001
ALLEN BRADLEY DRIVE 1336-C020-EOE-L2
BAUMULLER SERVO MOTOR DS56-M45-UL
SIEMENS POWER SUPPLY 6RB2160-0FB00
MODICON CONTROLLER CARD PCB-C REV A1
BALDOR AC INVERTER ID15J402-ER
CONTROL TECHNIQUES UNIDRIVE UNI1404
SIEMENS SERVOMOTOR 1FT6064-6AF71-4AH2
YASKAWA ELECTRIC CARD JANCD-MBB02-1
TEXAS INSTRUMENT POWER SUPPLY A
ALLEN BRADLEY DRIVE 1336F-BRF150-AN-EN
FANUC A05B-2301-C372 Teach Pendant
SIEMENS SERVO MOTOR 1FK7083-5AH71-1AA2
ALLEN BRADLEY DRIVE 1336-B015-ECE-L3
MTS SERVO DRIVE MPA
BK PRECISION 1474
MAG GARD MOTOR CIRCUIT PROTECTOR LAFMV1027