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。
SIEMENS CONVERTER
SIEMENS SIMATIC S7 6ES7321-1FH00-0AA0
REXROTH PERMANENT MAGNET MOTOR MAC090C-0-KD-4-C/110-A-0/WI520LV/S001
SIEMENS INTERFACE MODULE 6ESMA12
SIEMENS SERVO MOTOR 1FK7103-5AF71-1TH5
INDRAMAT SERVO MOTOR MAC112D-0-ED-4-C/130-A-2/WI574LX/S018
BAUMULLER NURNBERG SERVO MOTOR VDOKFF 132-L46
INDRAMAT DRIVE TRANS-01-M REPAIR SERVICE
ALLEN BRADLEY SLC500 RELAY OUTPUT MODULE 1746-OW8 SER A
ALLEN BRADLEY 1775 L3 MAIN PROCESSOR W/EXTD INSTRUCTION
REX TRANSFORMER 3PR-0027C5H
RELIANCE ELECTRIC CARD
SIEMENS SERVOMOTOR 1FT5108-0AC71-1-Z
OKUMA BLII-D5050A SERVO DRIVE A6A4065
ALLEN-BRADLEY AC/DC INPUT MODULE 1771-IAD SER. D
FANUC AC SERVO MOTOR A06B-0352-B751
DIRECT LOGIC CONTROLLER CARD D2-12TR
MITSUBISHI AC SERVO MOTOR HC-P023
MITSUBISHI AC SERVO MOTOR SA352B
INDRAMAT CONTROLLER TDM1.W1-000
SCHNEIDER MODICON QUANTUM 140CPS11420
INDRAMAT PERMANENT MAGNET MOTOR MAC112C-0-HD-2-C/130-A-1
INDRAMAT MEMORY CARD FWC-HSM1.1-SSE-03V38-MS , HSM01.1-FW
SIEMENS SERVO MOTOR 1FK7063-5AF71-1TB3
GIDDINGS & LEWIS ENCODER I/O MODULE R3
SIEMENS SIMODRIVE UEB. MODULE 6SN1112-1AA00-0AA0
NACHI AC SERVO MOTOR
FANUC DRIVE AC SERVO SPINDLE A06B-6044-H021
SIEMENS SERVO MOTOR 1FK7083-5AH71-1SB5
MOOG G400 SERIES SERVOMOTOR G
SIEMENS SERVO MOTOR 1FK7101-5AF71-1EG3
FANUC SERVO MOTOR A06B-0143-B175#0008
ALLEN BRADLEY SERVO MOTOR 1326AB-B530E-S2L
SIEMENS SERVO MOTOR 1 FT5074-0AF01-2-Z
BEIJER ELECTRONICS PANEL E900T TYPE:04440C
SIEMENS SERVO MOTOR 1FK7063-5AF71-1GB2
SIEMENS SINAMICS S120 COMPACT FLASH CARD 6SL3054-0CF01-1AA0