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 PANELVIEW 6181-CGCCBBZA
SIEMENS SINAMICS SINGLE MOTOR MODULE 6SL3120-1TE21-0AA1
FANUC AC SERVO MOTOR A06B-0319-B072#7076
MITSUBISHI SERVO DRIVE MR-SZ37 VER.A
ALLEN BRADLEY DRIVE 1336F-A030-AA-EN REPAIR SERVICE
SIEMENS POWER SUPPLY 6SN1145-1BB00-0FA1/0FA0
ALLEN BRADLEY DC CONTROLLER A
ALLEN BRADLEY PANELVIEW PLUS 1000
BALDOR SERVO MOTOR
RELIANCE ELECTRIC SP500 VS DRIVE 1SU21003
PORTER PEERLESS SERVO MOTOR
ABB BOARD DSQC 336
FANUC POWER SUPPLY A06B-6087-H126
ALLEN BRADLEY SLC 150 CABLE 1745-C3
FUJI ELECTRIC CIRCUIT BREAKER EG103A
OMRON POWER SUPPLY S82K-03024
SIEMENS SPINDLE MOTOR 1PH6101-4NF49-Z
ALLEN BRADLEY DRIVE-POWER SUPPLY/SERVO DRIVE 2094-BC0
ALLEN BRADLEY DRIVE 1336-B020-EJE-RP3
INDRAMAT PERMANENT MAGNET MOTOR MKD112D-027-GG3-AN
FANUC DRIVE A06B-6089-H201
ALLEN BRADLEY KINETIX 6000 2094-BC01-M01
CINCINNATI MILACRON MEMORY MANAGEMENT UNIT A
SIEMENS SERVO MOTOR 1FK7060-5AF71-1AH2
BOARD Z
ALLEN BRADLEY PANELVIEW 2711-K9C9
SIEMENS SERVO MOTOR 1FT6084-1AH71-4EH1
EMERSON SERVO MOTOR DXE 450
ALLEN BRADLEY SERVO MOTOR 1326AB-A1G-11
SIEMENS SERVOMOTOR 1FK7063-5AF71-1AG0
FANUC RESISTOR UNIT A04B-0234-C405
YASNAC YASKAWA MODULE JZNC-OP101
SIEMENS SERVO MOTOR 1FK7060-5AF71-1TA0
ALLEN BRADLEY DRIVE 1336-C020-EJE-L2
FANUC FAN UNIT A04B-0805-C362
GOULD PERMANENT MAGNET SERVO MOTOR M122-B3BA-900H
DC SERVO MOTOR M