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 SPINDLE AMPLIFIER A06B-6102-H215#H520
KEB COMBIVERT BRAKE 07.03.
BOSCH SERVO MOTOR SF-A2.0020.030-10.050
SIEMENS SERVO MOTOR 1FT6102-1AC71-2EH1
CONTROL TECHNIQUES DRIVE CD550K
MISUBISHI SERVO DRIVE MDS-B-SPH-370 REPAIR SERVICE
WOOD'S E-TRAC AC INVERTER AFC2003.OB2S
INDRAMAT A.C. SERVO CONTROLLER TDM1.W1-2
OLSUN TRANSFORMER 8654 S-34812
SIEMENS SERVO MOTOR 1FK7100-5AF71-1EH2
ALLEN BRADLEY DRIVE 1336-B025-EAF-L1
FANUC SERVO AMPLIFIER A06B-6059-H218#H518
BRUSH TYPE SERVO AMPLIFIER 16A20ACR
BALDOR POWER SUPPL PS0012A01
ALLEN BRADLEY 2711E-T14C6 Panelview
ALLEN BRADLEY MICROLOGIX 1000 1761-L32BWA
POWERTEC DC POWER SUPPLY 9NA
ALLEN BRADLEY INPUT/OUTPUT MODULE 1746-A13
ALLEN BRADLEY DRIVE 1336-B020-EAE-L2
AC TECH DRIVE Q15015B
SIEMENS MICROMASTER 420 6SE6420-2UD24-0BA0
INDRAMAT 3 PHASE INDUCTION MOTOR 2AD134D-B050A1-CS07-D2N1
INDRAMAT PERMANENT MAGNET MOTOR MKD025B-144-KGO
FANUC AC SPINDLE SERVO UNIT A06B-6055-H218
SIEMENS SERVO MOTOR 1FT6064-1AH71-1AG1
SIEMENS SERVO MOTOR 1FT6034-1AK71-2AG1
APPLIED MOTION PRODUCTS INC. GEARBOX 34 PLANETARY
DORRIES SCHARMANN PANEL
SIEMENS SERVO MOTOR 1FK7100-5AF71-1SA3
A.C SIMPSON AUTO DELTA PHASE SHIFTING TRANSFORMER A02240Z030
ABB DRIVE ACS
BAUMULLER SERVOMOTOR DSF 132 M-54W20-5 UL
SIEMENS SERVO MOTOR 1FK7060-5AF71-1GA2
PANASONIC SERVO DRIVE MSD3A3P1E
ALLEN BRADLEY POWERFLEX 700 SERIES-A 20B C 5P0 A 0 AYNANC0
SQUARE D SYMAX INPUT MODULE AN-108
SIEMENS SINUMERIK (CARD) 6FC5250-5AY20-3AH0