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 DC SERVO CONTROLLER 1388-AV60
YASKAWA SERVOMOTOR SGMP-02A8YR21
SIEMENS SERVO MOTOR 1FK7083-5AH71-1AB0
SIEMENS FAN 2CW1332
SIEMENS SERVO MOTOR 1FT6064-1AH71-4EH1
ALLEN BRADLEY DRIVE 1336F-A030-AA-EN REPAIR SERVICE
SIEMENS SERVO MOTOR 1FK7103-5AF71-1TA0
PILZ PX 30/64
SIEMENS POWER BOOSTER 6SN1112-1AC01-0AA1 ** NEW OPEN BOX**
PACIFIC BRUSHLESS SERVO MOTOR R35KEAC-R2-NS-NV-00
MANNESMANN DEMAG MOTOR KBA 90 B 6
KOLLMORGEN SERVOSTAR DRIVE,SR
ALLEN BRADLEY SERVO MOTOR MPL-B540K-SK74AA
SIEMENS SERVO MOTOR 1FT6044-1AF71-3AG1
PARKER COMPUMOTOR AXL DRIVE 10328
EMERSON SERVO MOTOR MGM-340-CBNS-0000
SUPERIOR ELECTRIC MOTOR SS400B
FANUC AC SERVO MOTOR A06B-0312-B251
INDRAMAT PERMANENT MAGNET MOTOR MDD112C-N-030-N2L-130PB0
FANUC MOTOR A06B-0310-B101
KOLLMORGEN SERVO DRIVE BDS5AC-2-020
MITSUBISHI SERVO DRIVE MR-SE01
ALLEN BRADLEY DRIVE 1336-B015-EJE-FA2
BINDER BRAKE
SELCA MOTORI SPINDLE MOTOR SMD 13 N18-9 HS K
INDRAMAT CONTROLLER CARD B06-01
SIEMENS SERVO MOTOR 1FK7042-5AK71-1TH5
CONTROLER CARD 531X139APMANG2
BOSCH DRIVE SM 10/20-T/A
SIEMENS SERVO MOTOR 1FK7060-5AH71-1AH5
SIEMENS SERVO MOTOR 1FK7060-5AH71-1GH5
CUTLER HAMMER PANELVIEW 39PTHX PM 3000
INDRAMAT AC SPINDLE DRIVE RAC 2.A0I-W1-220
TELEMECHANIQUE DRIVE ATV31HU22N4
ALLEN BRADLEY AC SERVO MOTOR 1326AB-B420E-21
SIEMENS CONTROLLER CARD 6SN118-0DM21-0AA0
OKUMA OPERATING PANEL 5020 E