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。
BALDOR Q07-A016 LIMIT SWITCH
TB WOODS AP225P *FACTORY SEAL*
IDAB INCORP. MODEL DC MOTOR
ROSEMOUNT 3051L3AA0FN21AAM5 LIQUID LEVEL TRANSMITTER
LOT OF 2 TYCO EV500-5B BUBBA RELAY
KOLLMORGEN B-102-A-21 SERVO MOTOR
ENDRESS+HAUSER PROSONIC M FMU42-NQB2D42A RADAR LEVEL MEASUREMENT
SCHNEIDER AUTOMATION TSXCCM100
MITSUBISHI Q12HCPU CPU UNIT
ABB ACH550-PDR-031A-4 AC DRIVE
ROIBOT CRA-101B CONTROLLER
ALFA LAVAL SRC-GC-3A-1.NT 1-1/2" PNEUMATIC PLUG VALVE
MICROSCAN FIS
KOOLTRONIC KA4C2.0NP17L AIRCONDITIONER
SIEMENS D DRIVE 6RA2176-6GS20-0
GE FANUC IC660BBA024 ANALOG IN/OUT BLOCK
ALLEN BRADLEY 2711-KA1 SER. A REV. E FRN 3.01.00 PANELVIEW
MOELLER NZMB2-A63-NA CIRCUIT BREAKER
SIEMENS 6ES7 134-5SB50-0AB0 SIMATIC 7 MODULE
PHILLIPS INTERFACE PC BOARD
ALLEN BRADLEY 1326AB-B420E-M2L SER. B AC SERVO MOTOR 1.09 KW 3000RPM
