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。
GOULD CONTROLLER CARD
ALLEN BRADLEY DRIVE 1336VT-B040-EAR-S1
YASKAWA AC SERVO MOTOR SGMSV-15D3A61
DURA DRIVE HDC01.1-A040N-IB01-01-FW
YASKAWA ELECTRIC SERVOMOTOR SGMD-40AWA-YR12
INDRAMAT CONTROLLER CARD B03-04
FANUC PLC MODULE A03B-0819-C104
CINCINNATI MILACRON PC BOARD A
SIEMENS DIGITAL OUTPUT MODUL 6ES5454-7LA11
MITSUBISHI SERVO DRIVE MDS-A-CV-110
INDRAMAT SERVO MOTOR MAC112C-0-ED-4-C/130-A-1/W1520LX/S05
OKUMA DRIVE (200 A)
ALLEN BRADLEY DRIVE 1336VT-B020-EAP-S1
INDRAMAT DRIVE DDS02.1-W025-D
MITSUBISHI SERVO MOTOR HA 200CB
ORAMEC SERVO MOTOR MAC-DE006B2/A
ALLEN BRADLEY PANELVIEW 2711-T10G20
FANUC AC SERVO MOTOR A06B-0355-B756
YASKAWA ELECTRIC POWER SUPPLY UNIT CPS-10FB
SIEMENS SERVO MOTOR 1FK7080-5AH71-1AH0
ALLEN BRADLEY DRIVE 1336-B015-EJE-RP1
ALLEN BRADLEY OPERATOR INTERFACE 6180-ELIEGLDTECZ
AC SERVO MOTOR USAREM-02CMA32
FANUC SERVO MOTOR A06B-0314-B031#7075
ALLEN BRADLEY AC SERVO MOTOR MPL-B330P-MJ72AA
ACTUS AC SERVO MOTOR NA20-1.5F-G10
INDRAMAT AC-MAINSPINDLE DRIVE RAC 3.LP0-W1-220
ALLEN BRADLEY DRIVE 1336-C020-EAE-L2
GOMI ELECTRIC TRANSFORMER E
ALLEN BRADLEY DRIVE 1370AR-AOB74-E REPAIR SERVICE
SIEMENS SERVO MOTOR 1FK7101-5AF71-1EB2
SIEMENS SERVO MOTOR 1FT6064-1AH71-2EH1
GE FUJI DRIVE 6KAF343075ESA1 REPAIR SERVICE
FANUC SERVO MOTOR A06B-0514-B259
FANUC SERVOMOTOR A06B-0854-B392
EMERSON SERVODRIVE FX-316
SIEMENS CONTROLLER CARD 6SN1118-0AD11-0AA1