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 SINUMERIK EPROM MODULE
FANUC BOARD A20BB
SIEMENS SERVO MOTOR 1FK7060-5AF71-1AH5
ACOPOS PLUG IN ENDAT ENCODER INTERFACE MODULE 8AC123.60-1
INDRAMAT CONTROLLER CARD B01
ALLEN BRADELY KINETIX 6000 SERVO DRIVE 2094-AMP5-S
SIEMENS SERVO MOTOR 1FK7063-5AH71-1SB3
ALLEN BRADLEY FREQUENCY AC DRIVE 1333-AAB SER D+
HYDROSYSTEMS PANEL SPC9601
REX TRANSFORMER 3PR-0027C5H
ALLEN BRADLEY 1774-TB2 PROGRAM PANEL INTERFACE MODULE
SIEMENS SERVO MOTOR 1FT6084-1AH71-2AG1
BAUMULLER NURNBERG SERVO MOTOR VDOKFF 132-L46
SIEMENS SERVOMOTOR 1PH6107-4NF49-Z
INDRAMAT AC SERVO CONTROLLER TDM 3.W0
EBM FAN R2E190-AE77-99
ATLANTA GEARBOX 58 84 007
INDRAMAT SERVO DRIVE TDA 1.D0I
SIEMENS SERVO MOTOR 1FT6102-1AC71-4AG1
EMC INC. DRIVE CIMR-G5U47P5
SIEMENS CONTROL PANEL 6SL3255-0AA0-4BA1
SIEMENS SERVO MOTOR 1FK7063-5AH71-1TB3
ALLEN BRADLEY SERVO MOTOR 1326AS-C3E-11-A7
MTS DRIVE MPA
SIEMENS 3-BRUSHLESS SERVO MOTOR 1FT5064-1AF71-4EA0
SIEMENS SERVO MOTOR 1FT6062-1AF71-1EG1
HUTTINGER ELEKTRONIK RF DRIVER -AMP IDENT.-NR.:
SIEMENS CONTROLLER CARD 6RB2000-0ND00
ALLEN BRADLEY POWERFLEX 70 DRIVE 20A D 8P0 A 3 AYNNNNN SER.A
ALLEN BRADLEY DRIVE 1391-DES45-DI
BALDOR AC INVERTER ID15J203-ER
HITACHI BOARD BEJ
SERVCOS INTERFACE CARD 1C-SE-EN1-EN2-NNN-NN-S-NN-FW
MEAN WELL SWITCHING REGULATOR DRT
ALLEN BRADLEY POWER FLEX70 20A D 8P0A0 AYNNNNN
ALLEN BRADLEY DRIVE 1336-B020-EOE-L1
INDRAMAT SERVOMOTOR MKD071B-035-GG0-KN