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。
HEIDENHAIN CONTROLLER (ID 667 945-01) UM 111D
BOSCH SERVO MOTOR SF-A4.0125.030-14.050
MITSUBISHI INVERTER, FR-A520-3.7K-TFA
GPD515 MAGNETEK DRIVE GPD515C-B003
BAYSIDE GEARBOX MT
SIEMENS SERVO MOTOR 1FK7042-5AF71-1SH3
SIEMENS SERVO MOTOR 1FK7080-5AH71-1EB5
TRAFOTEK TRANSFORMER ( ABB) 3HAB 2951-1
YASKAWA SERVOPACK CACR-IR 101010FC
ALLEN BRADLEY COMPACT LOGIX 1769-L32E
KOLLMORGEN SERVOMOTOR EB-202-B-11-B3-00
FANUC POWER UNIT A14B-0082-B201-06
ALLEN BRADLEY DRIVE 1336-B015-EJE-L1
TECHNO CONTROLLER CARD MEMO MOD
TELEMECANIQUE DRIVE TLD1342F312121
ALLEN BRADLEY SERVO MOTOR F-4030-Q-H00AN
FANUC SERVO DRIVE A06B-6079-H208
SIEMENS SERVO MOTOR 1FK7063-5AH71-1GH0
SIEMENS MOTOR 5K10 5071 16016
ALLEN BRADLEY POWERFLEX 70 20AE6P1A0AYNNNNN
BAUMULLER SERVO MOTOR DSOG 71-M
ALLEN BRADLEY DRIVE 1336-B040-EOG-S1 REPAIR SERVICE
BALDOR FLEX DRIVE FDH4A27TR-RN23
SIEMENS SINUMERIK MCP 438C 6FC5203-0AF22-0AA2
ASEA AUXILLARY CONTACTOR SK 814 001-AF
SIEMENS SERVO MOTOR 1FK7083-5AF71-1GH0
INDRAMAT IKG006807 CABLE : 15.5 MM
SERVO MOTOR , B32
ALLEN BRADLEY PANEL VIEW **AS IS** 2711-B5A2
INDRAMAT AC SERVO CONTROLLER KDS1.W1/115A
ALLEN BRADLEY DRIVE 1336VT-B020-EAP-FA
NUM UNIVERSAL AC CONTROLLER 3UACL5050I
SIEMENS SERVO MOTOR 1FK7080-5AH71-1EB5
SIEMEMS MICROMASTER 440 6SE6440-2UC24-0CA1
SIEMENS SERVO MOTOR 1FK7063-5AH71-1TG2
INDRAMAT CONTROLLER TDM1.W1-000
OKUMA BL SERVO MOTOR BL-MC200J-20SN-A