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 POWER FLEX 70 20A D 3P4 A 3 AYNNNC0
ALLEN BRADLEY SPINDLE MOTOR 1327AB-AFL-22-E
TB WOOD'S AC DRIVE X4C50150C
SIEMENS SERVO MOTOR 1FK7060-5AF71-1EG0
INDRAMAT CONTROLLER CARD DCF01-12
SIEMENS SERVO MOTOR 1 GA5102-0AH41-4FZ7-Z
SIEMENS FAN 2CW5366-1
BALDOR SERVO MOTOR BSM90N-275AA
CONTROLLER CARD
SSD DRIVES PARVEX SERVO MOTOR NX310EAKR7001
FANUC SERVOMOTOR A06B-0602-B232 REPAIR SERVICE
PILZ DISPLAY 307668
Allen Bradley 2711-T10C8 Panelview
SIEMENS SERVO MOTOR 1FK7101-5AF71-1GA0
BALDOR VECTOR DRIVE VE0667A01
SIEMENS SERVO MOTOR 1FK7103-5AF71-1SG0
SIEMENS CONTROLLER CARD 6SN1118-0DM33-0AA0
MCG DC MOTOR 2234-MTE4002
FANUC CONTROL BOARD A16BC
CUTLER-HAMMER D7D SERIES TOUCH PANEL D7DBA10AGA1XXX
DURA DRIVE HDC01.1-A040N-IB01-01-FW
SIEMENS POWER SUPPLY 6SN1112-1AC01-0AA1
SIEMENS SERVO MOTOR 1FK7042-5AF71-1SG3
MOOG SERVO MOTOR G
ALLEN BRADLEY DRIVE 1336-B040-EJG-L1
FANUC AC SERVO MOTOR A06B-0502-BR
MITSUBISHI SERVO DRIVE MR-SE01
ECOSTEP 100 100-AA
EMERSON SERVODRIVE FX-316
INDRAMAT POWER SUPPLY TVM2.W
ABB DRIVE (OPEN BOX) ACS800-U
BALDOR POWER SUPPL PS0012A01
FANUC BOARD A20BA
FANUC TERMINAL UNIT A02B-0047-C781
SIEMENS CONTACTOR,3UA59 00-2E25-40A
PAPST MULTIFAN 4394
SIEMENS SERVO MOTOR 1FK7083-5AH71-1EG2