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。
MITSUBISHI POWER MODULE (IGBT) QM300HA-H
ALLEN BRADLEY VERSAVIEW PANELVIEW 6189-RDT10C (LOGIC MODULE 6189-RPRH)
SIEMENS SIMATIC OUTPUT MODULE 6ES5454-4UA13
SIEMENS SERVO MOTOR 1FK7042-5AK71-1GB2
SIEMENS SERVO MOTOR 1FK7103-5AF71-1SB2
FANUC INPUT MODULE ID64C A03B-0801-C123
ALLEN BRADLEY AC SPINDLE CONTROLLER 8510A-A11-A2
ABB ROBOTIC DRIVE 3HABC
SIEMENS SERVO MOTOR 1FK7103-5AF71-1AA5
MODICON RACK HOUSING MODULE AS-H
REXROTH INDRAMAT ECO DRIVE DKCFW
SIEMENS POWER SUPPLY SIMODRIVE 6SN1145-1BA01-0BA1
SIEMENS SINUMERIK MEMORY BOARD 6FX1126-7BA01
MITSUBISHI AC SERVO MOTOR HC-KFS13D
MAGNETEK SERVO DRIVE A
FANUC PLC MODULE A03B-0807-C152#D
FANUC SERVOMOTOR A06B-0501-B501 REPAIR SERVICE
FANUC AC SERVO MOTOR A06B-0143-B175
CINCINNATI MILACRON MEMORY CARDG
SIEMENS SERVO MOTOR 1FT6062-1AH71-2EH1
INDRAMAT SERVO MOTOR MAC90C-0-GD-4C/110-A-0/W1520/S01
YASKAWA SERVO MOTOR USAFKD-50-FJ-11
CONTROL TECHNIQUES BRUSHLESS AC SERVO MOTOR 75UMD300CACAA
SCHNEIDER AUTOMATION INC. ANALOG OUTPUT MODULE AS-BDAU-202, DAU 202
FANUC SERVO AMPLIFIER A06B-6096-H116
GETTY SERVO MOTOR M237-H6CB-300W
COMPUMOTOR SERVO DRIVE GV-U3E
INDRAMAT PERMANENT MAGNET MOTOR MDD090C-N-040-N2L-110PB0
PARKER BAYSIDE GEARBOX PV23FE-050
FANUC PC BOARD POWER SUPPLY A16B
SIEMENS SERVO MOTOR 1FK7080-5AF71-1EH2
CONTROL TECHNIQUES DYNAMIC BRAKING UNIT CD II DBU
SIEMENS SERVO MOTOR 1FK7100-5AF71-1TG5
SQ-D 8030-RIM-125 Module
INDRAMAT CONTROLLER CARDA-3
AMICON TYPACT DRIVE TPY2-154A-2HP
FANUC AC SERVO MOTOR A06B-0147-B088