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。
MICROSAFE MC 4200 MC4248RE
SIEMENS SERVO MOTOR 1FT6044-1AF71-1EH1
YASKAWA MOTOMAN BOARD JANCD-MIO04
SIEMENS SINUMERIK 820 PANELVIEW 6FX3561-1AC-Z
SIEMENS CONTROLLER CARD C98043-A1006-L2
VOLTAGE REGULATOR
SIEMENS SERVO MOTOR 1FK7101-5AF71-1EG3
CUTLER HAMMER PUSH PULL STOP BUTTON 10250T563-11
SIEMENS SINAMICS 45 A SINGLE AXIS DRIVE 6SL3120-1TE24-5AA3
INDRAMAT AC MAINSPINDLE DRIVE KDA 3.A00-V
FANUC CONTROLLER CARD A16BA
SIEMENS SITOP MODULE 20A 6EP1336-3BA00
ALLEN BRADLEY POWERFLEX 40 DRIVE 22B-B5P0N104 SER A
ALLEN BRADLEY DRIVE 2098-DSD-HV100X-DN, PART NO: SERIES B
SIEMENS CONTROL CARD 6FX1122-4CA00
ALLEN BRADLEY SERVO DRIVE 1336-B003-EDD-L3
ALLEN BRADLEY RACK WITH POWER SUPPLY FT10555 , 1771-P1
SIEMENS SERVO MOTOR 1FK7083-5AF71-1GB2
ALLEN BRADLEY PROCESSOR WITH POWER SUPPLY 1772-LWP D
FANUC SERVOMOTOR A06B-0319-BR
ALLEN BRADLEY CONDUCTOR 140M-C2E-C10
TELEMECANIQUE DRIVE ATV28HU41N4
ALLEN BRADLEY DRIVE 1302-C010-AA
ALLEN BRADLEY AC SERVO MOTOR(AS IS) MPL-B330P-MJ74AA
BALDOR DC MOTOR M-3363-BLYCN
FANUC CONTROLLER CARD A16BA
FANUC AC SERVO MOTOR A06B-0315-B
MITSUBISHI CONTROLLER CARD TR23D-41-A
KEB COMBIVERT DRIVE 21F5HAR-YU50
INDRAMAT SERVO MOTOR MDD112D-N-030-N2L-130PB2
ALLEN BRADLEY DC MOTOR 1326D5-L4D-FL-E1
INDRAMAT SERVOMOTOR MDD112C-N-015-N2M-130PB0
INDRAMAT POWER SUPPLY HVE04.2-W075N/S201
SIEMENS OPERATOR PANEL 6SE6400-0BP00-0AA0
ALLEN BRADLEY PLC PROCESSOR MODULE 1785-L30B/A
BALDOR SERVOMOTOR BSM80B-250AA
SIEMENS SERVO MOTOR 1FK7103-5AF71-1SG3