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 SERVO MOTOR 1FT6105-8AC71-4FB1
FANUC SERVOMOTOR A06B-0348-B356 REPAIR SERVICE
SIEMENS SERVO MOTOR 1FT6102-1AC71-3AG1
FANUC A05B-2301-C370 Teach Pendant
MITSUBISHI SERVO MOTOR (NO ENCODER) HC202BS-S1
MAGNETEK GPD DRIVE G050.M-10
LENZE/ AC TECHNOLOGY DRIVE Q35100B REPAIR SERVICE
ALLEN BRADLEY AC SERVO MOTOR 1326AB-B530E-21-Z13
SIEMENS SERVO MOTOR 1FT6086-1AH71-2AG1
FANUC A06B-6066-H006 Servo Amplifier
SIEMENS SERVO MOTOR 1FK7083-5AH71-1EH2
BALDOR BSM80A-275AA SERVO MOTOR
FANUC SERVO MOTOR A06B-0314-B574#7008
YASKAWA SERVOPACK CACR-TS111Z1SR
ACTUS POWER DRIVE NPSA-N OR NPSA-15N
DC SERVO MOTOR M
YASHKAWA AC SERVO MOTOR USADED-32YRW11
ORMEC D- SERIES SERVO DRIVE SAC-D04C/I
SIEMENS SERVO MOTOR 1FK7100-5AF71-1AA3
SIEMENS SERVO MOTOR 1FK7080-5AH71-1AB3
ALLEN BRADLEY DRIVE 1336-B020-EOE-L3
CONTROLLER CARD
ALLEN BRADLEY 150-A24FB
BRUSH TYPE SERVO AMPLIFIER 16A20ACR
SIEMENS SIMATIC S5 DIGITAL INPUT MODULE 6ES5 431-7LA11
STEGMANN ENCODER WITH SHAFT 81A
SIEMENS SERVO MOTOR 1FK7101-5AF71-1EH2
SIEMENS SIMATIC S5 6ES5 943-7UB21
INDRAMAT DIGITAL CONTROLLER DDS02.1-W150-D
ACOPOS MODULE BAC120.60-1
SIEMENS SERVO MOTOR 1FK7063-5AF71-1AG0
SQUARE D CONTACT KIT SA012
ABB VARIABLE FREQUENCY DRIVE ACS550-U1-012A-4 + B055
ALLEN BRADLEY POWER SUPPLY 1771-P2
ALLEN BRADLEY AC DRIVE 1336E-C125-AN-EN
ADVANTECH INDUSTRY COMPUTER IPC-6806P3-B
FANUC CONTROLLER CARD A20BD