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。
PACIFIC SCIENTIFIC SERVOMOTOR R34JENC-TS-NS-NV-00
ALLEN BRADLEY DRIVE 1336-B040-EAG-L1
FANUC SERVOMOTOR A06B-0158-B
ALLEN BRADLEY DRIVE 1336VT-B050-EAS-L2 REPAIR SERVICE
SIEMENS SERVO MOTOR 1FK7060-5AF71-1GH2
LENZE/ AC TECHNOLOGY DRIVE DL15400FA REPAIR SERVICE
SIEMENS SIMODRIVE 1P 6SN1123-1AA01-0FA1
NACHI SERVO DRIVE RBX1100
OMRON INVERTER SYSDRIVE 3G3EV-A2002M
BALDOR SERVO MOTOR
CUSTOM SERVO MOTOR MPM
MODICON BRUSHLESS SERVO MOTOR
RELIANCE ELECTRIC DRIVE PDM-20
SIEMENS SERVOMOTOR 1FT5102-1AC71-1AA0
YASKAWA DC MOTOR UGHMED-06-HS12
SIEMENS SERVO MOTOR 1FK7100-5AF71-1SH2
ALLEN BRADLEY AC SERVO MOTOR,1326AB-B530E-21
RELIANCE ELECTRIC CARD
ALLEN BRADLEY FUSE HOLDER 194R-NC030P3
CINCINATI MILACRON MOTOR 1PH6161-4NF00-Z
ALLEN BRADLEY DC CONTROLLER 1387-B-B0B260-B31-A4-B SER. B
GIDDINGS AND LEWIS SERVO MOTOR HSM490 56C
BALDOR AC SERVO DRIVE DBSCAAA
INDRAMAT AC SERVO CONTROLLER KDSW1-220
INDRAMAT AC SERVO CONTROLLER TDMW1
SIEMENS SERVO MOTOR 1FK7083-5AH71-1GG5
BUD RADIO OVEN VTL PS-7
APPLIED MOTION PRODUCTS INC. GEARBOX 34 PLANETARY
ALLEN BRADLEY PLC PROCESSOR MODULE 1771-LT3 SER A
SIEMENS CONTROLLER CARD 6SE7034-6EC85-0JA0
ALLEN BRADLEY 1305 ADJUSTABLE FREQUENCY DRIVE 1305-BA09A
SIEMENS SERVO MOTOR 1FK7080-5AF71-1AB5
NACHI-FUJIKOSHI SERVO AMP UNIT AUXL111A
SIEMENS SERVO MOTOR 1FK7060-5AH71-1AA0
ALLEN BRADLEY PANELVIEWB6C1X SER E
MITSUBISHI SERVOMOTOR HC-SFS352B
EATON TRANSFER SWITCH MODULE RLC1SEJ20200WRU