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 1FK7060-5AH71-1SH0
ALLEN BRADLEY INTEGRATED AXIS MODULE 2094-BC01-M01-S
KOLLMORGEN DRIVE *AS IS* S70302-NANANA-NA
CONTROL TECHNIQUES DYNAMIC BRAKING UNIT CD II DBU
MITSUBISHI PROGRAMMABLE CONTROLLER FX-4AD
ALLEN BRADLEY DRIVE 1336-C020-EJE-L1
SIEMENS SERVO MOTOR 1FK7040-5AK71-1GB3
INDRAMAT SPINDLE DRIVE TDA1.DPO
YASKAWA SERVO PACK CACR-IR20SB
MITSUBISHI INVERTER FR-A240E-2.2K
SIEMENS POWER LINE FILTER B84143-A80-R
ALLEN BRADLEY DRIVE 1391-DES22-DI-AQB
GETTY PERMANENT MAGNET FIELD SERVO MOTOR
ACTUS POWER AC SERVO MOTOR NA20-75F
EMERSON DELTAV MODULE KJ3221X1-BA1
SIEMENS POWER MODULE 6SN1118-0AE11-0AA1
ALLEN BRADLEY DRIVE 1336-B025-EJF-S1
CMC DRIVE SM
SIMENS POSMO 75 W WITH GEARBOX 6SN2132-1CU11-1BA1
YASKAWA ELECTRIC SERVOMOTOR SGMGH-44QCA61
ALLEN BRADLEY POWER FLEX 700S 20D D 034 A 0 EYNANABE
PARKER POWER SUPPLY POP 12
ALLEN BRADLEY DRIVE 1305-BA02A SER C
SIEMENS SERVO MOTOR 1FK7080-5AH71-1GA0
ALLEN BRADLEY AC SERVO MOTOR 1326AB-B420E-21
SIEMENS SINUMERIK 840D 6FC5210-0DA00-0AA0/0AA1
ALLEN BRADLEY DRIVE 1370AR-AOA74-E REPAIR SERVICE
ELAU SERVO DRIVE MC
YASKAWA SERVO AMPLIFIER JZNC-XIU01
RELIANCE SERVO MOTOR B14H1060N-QW
ALLEN BRADLEY DRIVE 1336-B020-EAE-FA2
ALLEN BRADLEY DRIVE 1336F-B040-AE-EN-HAS1-L6 SERIES C
SIEMENS SERVO MOTOR 1FK7100-5AF71-1AA0
MITSUBISHI CONTROLLER CARD MC161-1
FANUC BOARD AL6BB
SIEMENS SIMOREG DC MASTER 6RA7018-6DS22-0-Z
SIEMENS MOTOR (AS IT IS) 6SN2132-0AA11-1BA0