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。
INDRAMAT DIGITAL AC SERVO COMPACT CONTROLLER DKS01.1-W100A-DL02-01-FW
ALLEN BRADLEY MOTOR CONTROLLER 150-A24NB-ND
AMK SERVO MOTOR DVB0
PACIFIC SCIENTIFIC BRUSHLESS SERVO MOTOR R67HENA-R2-NS-NV-00
SIEMENS SERVO MOTOR 1FT6062-1AF71-4AH1
ALLEN BRALDEY SLC500 OCTAL INPUT MODULE 1746-IB16 SER C
MOTOMAN YASKAWA TEACH PENDANT JZRCR-NPP01-1
ALLEN BRADLEY TRANSFORMER 1321-3R2-A
CONTROLLER CARD
FANUC BOARD A16BA
YASKAWA POWER SUPPLY CIMR-MRXN2045 (SPEC. 20455A)
LITTON SERVOTECHNIK JSMBH-21-S-1
ELAU DRIVE PMCK
SCHNEIDER ELECTRIC SERVO MOTOR ILA1F571PC1A0
SQ-D 8030-CRM-255 Module
FANUC SPINDLE AMPLIFIER MODULE,A06B-6092-H326#H500
FANUC A06B-6090-H004 Servo Amplifier
COMPUMOTOR 2100 SERIES INDEXER 2100-1 (CODE M)
SIEMENS PANELVIEW 6FC5210-0DF20-0AA0
ALPHA GETRIEBEBAU GEAR BOX SK 140-MF
SIEMENS SIMOVERT 6SE1200-3DA20
SIEMENS SERVO MOTOR 1FK7063-5AH71-1SB5
SIEMENS PANELFRONT 6FC5203-0AF02-0AA0
SCHURTER CIRCUIT BREAKER AS168X-CB3
SY/MAX MODULE ROM 122
INDRAMAT CONTROLLER CARD CLC-D02.3
SIEMENS SERVO MOTOR 1FK7103-5AF71-1GB5
ALLEN BRADLEY SERVO CONTROLLER 1391-DES22-DI
SIEMENS SERVO MOTOR 1FK7063-5AH71-1GG3
YASKAWA SERVOMOTOR SGMP-02A8YR21
CONTROLLER CARD 147014 6860
ALLEN BRADLEY DRIVE 1336S-C050-AN-EN REPAIR SERVICE
ALLEN BRADLEY DRIVE 2098-DSD-HV030X
YASKAWA ENCODER UTMAH-B15AS4KB
ALLEN BRADLEY MODULE 160-BA03NSF1P1 SER C
SIEMENS SIMODRIVE 2x25A 6SN1124-1AB00-0BA2
INDRAMAT MAGNET MOTOR MAC112D-0-ED-4-CWI511LV