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。
SIEMENS SERVO MOTOR 1FT6105-8AF71-3EB0
LENZE DRIVE PLC EPLXX
ALLEN BRADLEY DRIVE 1336VT-B060-EOS-L1 REPAIR SERVICE
SIEMENS CONTROLLER CARD 6FC5110-0DB02-0AA2
ALLEN BRADLEY DRIVE 1336-B020-EOE-FA2
ALLEN BRADLEY AC SERVO MOTOR 1326AB-B730E-21
HEIDENHAIN ENCODER ROD 426 2500
SIMENS CONTROLLER CARD 6SN1118-0DM31-0AA1
ALLEN BRADLEY AC SERVO MOTOR(AS IS) MPL-B330P-MJ74AA
ALLEN BRADLEY PANELVIEW 550 2711-K5A2
SIEMENS MICROMASTER 440 DRIVE 6SE6400-2UD24-0BA1
SIEMENS SINUMERIK BOARD 6FX1144-0BA00
EBM FAN R2E190-AE77-99
ALLEN BRADLEY POWERFLEX 22A-D6P0N104
CINCINNATI MILACRON BRUSHLESS SERVOMOTOR
PARKER SERVO DRIVE :BL756
INDRAMAT 3- PHASE INDUCTION MOTOR 2AD134C-B050B1-DS06-B2N1
STOBER ANTRIEBSTECHNIK GEARBOX P301AGN0050M
FANUC SERVO DRIVE A06B-6079-H104
INDRAMAT MEMORY CARD FWC-HSM1.1-SSE-02V47-MS
HONEYWELL EXPANSION MODULE FF-SRE3081E
FANUC AC SPINDLE MOTOR A06B-0828-B100
MITSUBISHI SERVO DRIVE MR-SE01
SIEMENS SERVO MOTOR 1FK7083-5AF71-1GG2
SIEMENS SERVO MOTOR 1FK7063-5AH71-1SA0
ALLEN BRADLEY SERVO MOTOR 1326AB-B2E-11-A5
YASKAWA SERVO MOTOR USADED-22-YR22
VOLTAGE REGULATOR
EAGLE PICHER BATTERY CF-6V7
EXLAR SERVO MOTOR SRSFM-EM2-268
SSR CARD YMA
SIEMENS SERVO MOTOR 1FK7103-5AF71-1EH3
INDRAMAT AC SERVO CONTROLLER TDM 3.W0
SIEMENS SIMODRIVE D
ALLEN BRADLEY DRIVE 1336S-BRF50-AN-FR SER D
MITSUBISHI INPUT MODULE AX41
FANUC CONTROLLER CARD A02B