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。
CINNCINNTI MILACRON NEW I/O BUS ADAPTER G REV D
SIEMENS SIMATIC 6ES5460-4UA12
CONTROL TECHNIQUE DRIVE UNI3402
INDRAMAT DKR AC CONTROLLER DKR03.1-W200N-BE23-01-FW
INDRAMAT CONTROLLER CARD A09-02
LUTZE MODULE 743452
SCHNEDIER PLC MODULE TSXAEM1613
SAFTRONICS INVERTER MINI VECTOR AC DRIVE CIMR-V7AU41P5
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YASKAWA SERVOPACK DRIVE CACR-IR 010101FB
INDRAMAT AC SERVO CONTROLLER TDM3.W0
YASKAWA VARISPEED TRANSISTOR INVERTER SPINDLE DRIVE CIMR-MT-7.5K
ALLEN BRADLEY DRIVE 1370AR-BOB67-E REPAIR SERVICE
KEYENCE PHOTOELECTRIC FIBER OPTIC FU-12
SIEMENS SERVO MOTOR 1FK7080-5AF71-1TH2
LENZE SERVO MOTOR MDFKABS090-22
ABB TEACH PENDANT 3HNE003141
HITACHI BOARD BEJ
NUM RLAYAGE 24S A
INDRAMAT AC SERVO CONTROLLER TDM3.W0
ABB TEACH PENDANT 3HAA3560-BBA
FANUC SERVO MOTOR A06B-0501-B756
DC TACHOMETER 601A100-2
SIEMENS SERVO MOTOR 1FK7063-5AH71-1GG5
TB WOOD'S AC DRIVE X4C50150C
SIEMENS PERMANENT MAGNET MOTOR 1FT5076-0AC71-2-Z
TELEMECANIQUE R.B. DENISON LOX-SWITCH TYPE L L100WS
ALLEN BRADLEY CONDUCTOR 140M-C2E-C16
FANUC SPINDLE AMPLIFIER MODULE,A06B-6092-H326#H500
SECO MENTOR M4000 DC DRIVE MODULE MA
SIEMENS SINUMERIK INTERFACE BOARD 6FX1121-4BG02
KEARFOTT RESOLVER CONTROL TRANSMITTER
CINCINNATI MILACRON CONTROL BOARD A
SIEMENS 2 AXIS SIMODRIVE 6SN1123-1AB00-0BA2
OKUMA SERVO DRIVE OKUMA BLIII-D
SIEMENS SERVO MOTOR 1FK7103-5AF71-1GB2
SIEMENS SERVO MOTOR 1FK7022-5AK71-1UG0