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。
CINCINNATI MILACRON ANALOG-DIGITAL CONVA REV B
ALLEN BRADLEY DRIVE 1391-DES45-DI
YASKAWA SERVO MOTOR USADED-40-YR15
FANUC AC SPINDLE MOTOR A06B-0758-B201 #3000
SIEMENS SIMATIC S7 PLC MODULE 6ES7 315-2AG10
SIEMENS SERVOMOTOR 1FK7060-5AF71-1EG0
ELECTRO CRAFT SERVO DRIVE (BRU-SERIES) DDM-030 PART NO:
PARKER ZENITH GEARHEAD UTN
YASKAWA PENDANT JZNC-XPP02B
ALLEN BRADLEY DRIVE 1336-B030-ECF-FC3
SIEMENS SITOP SMART 6EPBA10
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FANUC SERVO AMPLIFIER MODULE ,A06B-6114-H205
SIEMENS SERVO MOTOR 1FK7083-5AH71-1EG2
ALLEN BRADLEY DRIVE 1336VT-B050-EAS-L1 REPAIR SERVICE
SANYO DENKI OPTICAL SHAFT ENCODER F681000F01
BALDOR AC SERVO DRIVE DBSCAAA
ABB INDUSTRY BRAKE MODULE ACS-BRK-C
SIEMENS INTERFACE MODULE 6FX1122-5CE01
YASKAWA AC SERVO MOTOR USAFED-30F-J12
SIEMENS SERVO MOTOR 1FT6105-8AC71-3CL9-Z
ABB ROBOTIC DRIVE 3HABB
INDRAMAT DKR AC CONTROLLER DKR03.1-W200N-BE23-01-FW
INDRAMAT AC SERVO CONTROLLER TDM 3.W0
SPRECHER CONTACTOR KTA3-25
SIEMENS SERVO MOTOR IFT5104-0AC71-1-Z
INDRAMAT POWER SUPPLY HMV01.1E-W0075-A-07-NNNN
SIEMENS SERVO MOTOR 1FK7040-5AK71-1AB0
MITSUBISHI AC SERVO MOTOR HA-SH52B
FANUC CONTROLLER CARD *AS IT IS* A20B
KOLLMORGEN POWER SUPPLY BDS4-206J-202C2
CONTROL TECHNIQUES DRIVE CD550K
SIEMENS SPINDLE MOTOR 1PH7131-2MF02-0CA0-Z
EXLAR MOTOR GSXMXA-SM
SIEMENS SERVO MOTOR 1FK7063-5AF71-1EB3
AC SERVO MOTOR USAREM-02CMA32
ALLEN BRADLEY POWER RAIL 2094-PRS8 SERIES A