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 MOTOR CONTROLLER 150-A24NB-ND
YASKAWA SERVOPACK SGDH-02AE
FANUC POWER SUPPLY BOARD (FROM OPERATOR PANEL MDI/CRT UNIT ) A20B
FANUC CONTROLLER CARD A16BA
INDRAMAT SERVOMOTOR MAC112C-0-HD-1-B/130-AS05
INDRAMAT CLM DRIVE CLM01.3-XFW
SIEMENS SIMATIC S7 6ES7 407-0KA01-0AA0
APEX DYNAMICS INC. GEARBOX AB115-S2-P2
REMKE INDUSTRIES INGERSOLL CABLE 52671BH9R
PAPST MULTIFAN 4184 NXHH
FANUC PLC BASE UNIT A03B-0807-C001
SIEMENS SERVO MOTOR 1FK7101-5AF71-1TG3
ABB MAGNET SERVO MOTOR T6C4BR1209
SIEMENS SERVO MOTOR 1FT3070-5AZ21-9-Z-S13
ALLEN BRADLEY READY TO GO COMPLETE TESTING UNIT ALP/SPL
INDRAMAT SERVO MOTOR MDD093C-N-030-N2L-110PB0
AC TECH DRIVE Q15015B
SCHNEIDER TSX COMPACT NEW OPEN BOX DTA200/AS-HDTA-200
MITSUBISHI INVERTER FR-Z240-2.2KP-UL
SIEMENS SIMATIC S5 6ES5 926-3SA11
LINCOLN ELECTRIC POWER WAVE 450 10432
HYDROSYSTEMS PANEL SPC9601
ALLEN BRADLEY DRIVE 1336-C025-EOF-S1
BOSCH SERVO MOTOR SF-A2.0020.030-10.050
MODICON AEG POWER SUPPLY
FANUC AC SERVO MOTOR A06B-0153-B675
FUNUC TRANSFORMER 7155
FANUC AV501 PULSECOSER
ALLEN BRADLEY PANELVIEW PLUS LOGIC MODULE 2711P-RP
FANUC CONTROLLER CARD A16BA
FANUC SERVO MOTOR A06B-0513-B005
SIMATIC S5 1P6ES5095-8MB02
BALDOR DRIVE BPS
SIEMENS SERVO MOTOR 1FK7063-5AH71-1AG5
YASKAWA SERVOPACK SGDB-50ADD
ALLEN BRADLEY DRIVE 1336-C040-EAG-L3 REPAIR SERVICE
INDRAMAT DRIVE DKC02.FW