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 PANELVIEW 2711-B5A1X
BOSCH SERVO DRIVE VM60/EB-TA
FANUC SERVO AMPLIFIER UNIT A06B-6096-H207
KEYENCE DRIVE CA-U2
ALLEN-BRADLEY OUTPUT MODULE 1771-OBD
SIEMENS SINUMERIK 820 MEMORY CARD GE.570281.0001.02
SIEMENS SERVO MOTOR 1FK7042-5AK71-1TB3
MITSUBISHI DRIVE MR-SZ37
BOSCH SERVO MOTOR SE-B4.130.050-00.000
MICROSAFE MCF 4200 MCF4224X-3
ALLEN BRADLEY SERVO MOTOR 1326AS-C3E-11-A7
SIEMENS MAGNET MOTOR 1FT5074-0AC01-2-Z
TECHNO CONTROLLER CARD MEMO MOD
SIEMENS SERVO MOTOR 1FK7083-5AH71-1EG2
FANUC INV POWER UNIT A04B-0229-C405
ALLEN BRADLEY 10 SLOT CONTROL LOGIX CHASSIS 1756-A10 SER B,PART NO: B01
INDRAMAT SERVOMOTOR MAC063D-0-JS-2-C/095-A-1
SIEMENS SERVO MOTOR 1FK7083-5AH71-1EH2
MITSUBISHI SERVO DRIVE MDS-B-V1-35
FANUC FANS A04B-0801-C365
YASKAWA AC SERVO MOTOR SGMPH-02A1AJ16B
FANUC POWER SUPPLY BOARD (FROM OPERATOR PANEL MDI/CRT UNIT ) A20B
SCHNEIDER TSX COMPACT NEW OPEN BOX AS-BDAP-208
INDRAMAT DIGITAL AC SERVO COMPACT CONTROLLER DDC01.2-N100A-DA02-01-FW
SIEMENS SERVO DRIVE 6SC6112-0AA00
CUTLER HAMMER POWER UNIT SVX075A1-4A1N2
ALLEN BRADELY SMC-FLEX DRIVE 150-F135NBD SER B
MISUBISHI SERVO DRIVE FR-Z240-37K-UL REPAIR SERVICE
SOLA POWER SUPPLY SDN
INDRAMAT 3-PHASE INDUCTION MOTOR 2AD134B-B35RF1-ES06-D2N1
INDRAMAT 3 PHASE INDUCTION MOTOR 2AD100B-B050B4-AS03-C2N1
EATON IDT
RELIANCE ELECTRIC CARD
SIEMENS SERVO MOTOR 1FK7083-5AF71-1EA3
SIEMENS SERVO MOTOR 1FT6064-1AH71-3EG1
INDRAMAT AC SERVO POWER SUPPLY TVM2.W
PARKER SERVO DRIVE KHJX-DRIVE