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 SLIM POWER RAIL 2094-IN001X-XX-X
GENERAL ELECTRIC INTERFACE PANEL QPICGAE0000-A
SIEMENS FAN 2CW6144-8
T-VERTER N2-403-M3
SIEMENS SERVO DRIVE 6FC5247-0AA00-0AA3
ALLEN BRADLEY DRIVE 1336-B020-EAE SER.A
CINCINNATI SIMODRIVE 6SC 6101-3A-Z
FANUC CONTROLLER CARD A16BA
CONTROL TECHNIQUE SERVO MOTOR 142UMD200CAAAA
LEESON WASHGUARD ADJUSTABLE SPEED AC MOTOR CONTROL
SIEMENS SERVO MOTOR 1FK7101-5AF71-1AB5
BL SUPER SERVO AMPLIFIER 27BA100FFT30C
SICK OPTIC ELECTRONIC LIGHT CURTAIN RECEIVER LGSE400-33
INDRAMAT SERVO DRIVE TDMW1
ALLEN-BRADLEY OUTPUT MODULE 1771-OBD SER.C ***NEW OPEN BOX***
SIEMENS COUPLING MODULE 6FX1122-2AD02
FANUC SERVO MOTOR A06B-0223-B605
FANUC POWER SUPPLY MODULE A06B-6081-H102
BAUMULLER DRIVE BUM60-VC-AE-0022
ALLEN BRADLEY DRIVE 1336S-C050-AN-EN REPAIR SERVICE
SIEMENS SERVO MOTOR 1FK7100-5AF71-1EH3
ALLEN BRADLEY DRIVE 1336S-B007-AN-FR SER.D
ALLEN BRADLEY SERVO MOTOR VPL-B1652C-PJ12AA
BOSCH MODULE BOARD
YASKAWA MOTOMAN RACK WITH POWER SUPPLY CPS-10FB JZNC-RK41-3
CONTROLLER CARD
ALLEN BRADLEY DRIVE 1336VT-B020-EOP
FANUC SERVO MOTOR A06B-0512-BR
SIEMENS SERVO MOTOR 1FK7083-5AH71-1AG5
ALLEN BRADLEY SREVO MOTOR MPL-A330P-HK22AA
FANUC AC SERVO MOTOR A06B-0319-B
ALLEN BRADLEY POWER SUPPLY CHASSIS 1771-PSC
MITSUBISHI SPINDLE DRIVE UNIT MDS-B-SPH-110
CINCINNATI MILACRON SERVOMOTOR
CINCINNATI MILACRON ANALOG-DIGITAL CONVA REV J
SEW EURO DRIVE MAS51A
MITSUBISHI INPUT MODULE 32POINT DC SINK AX41-UL