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。
FANUC DC SERVOMOTOR A06B-0651-B005
HONEYWELL EXPANSION MODULE FF-SRE3081E
CONTROL TECHNIQUES DRIVE CDE150-R
DEMAG CRANES & COMPONENTS AC MOTOR KBA 80 A 4/2
ALLEN BRADLEY 1336 PLUS SENSORLESS DRIVE 1336S-B015-AN-EN4 SER D
SIEMENS SERVO MOTOR 1FT6086-1AF71-1EG1
FANUC SERVO AMPLIFIER A06B-6058-H222
TELEMECANIQUE SQUARE D LC1F265
ALLEN BRADLEY DRIVE 1336-B040-EOG-L2 REPAIR SERVICE
SIEMENS SERVO MOTOR 1FK7080-5AH71-1TA2
ALLEN BRADLEY SLC 150 CABLE 1745-C3
SIEMENS SERVO MOTOR 1FK7080-5AF71-1GH2
ARNOLD MULLER SERVO MOTOR DVSAD00
SIEMENS SERVO MOTOR 1FK7101-5AF71-1AH5
HEIDENHAIN ENCODER ROD 426 2500
CUTLER HAMMER PANELMATE 37PKHX-PM-3000
SIEMENS SERVO MOTOR 1FK7083-5AF71-1GB0
SIEMENS MAGNET SERVO MOTOR 1FT5108-0AC01-1-Z
ALLEN BRADLEY PANELVIEW 550 2711-K5A2
ALLEN BRADLEY SERVO MOTOR 1326AB-B2E-11-A5
HUB CITY GEARBOX
SIEMENS CONTROLLER CARD 6DD1648-0AB0 ES1
FANUC AC SERVO MOTOR A06B-0123-B175 #0075
INDRAMAT SERVOMOTOR MAC112D-0-ED-4-C/130-A-0
SIEMENS 3 PHASE MOTOR 1FK7040-2AK71-1CB2
FANUC BOARD A16BA
SIEMENS SERVO MOTOR 1FK7040-5AK71-1SG0
CTC PARKER P91-5JB-1A0H-4A2
YASKAWA SERVO MOTOR SGMG-09V 2AB
HILSCHER CONTROLLER CARD LK KA-PB01
STOBER POSIDRIVE FDS4150/B
ALPHA GEAR BOX SP140-MF1-4-2K1-2S
SIEMENS SERVO MOTOR 1FT6084-8AF71-3EA5
SIEMENS CENTRAL PROCESSING UNIT T1315-DR
ALLEN BRADLEY 700P AC RELAY 700-P800A1
MAGNETEK DRIVE GPD 315 MVB018
ACCU-PAK BOARD