电子技术发展起来了，单板机出现了，后来人们尝试使用单板机来替代继电器电路，结果很复杂的逻辑，只要集成在一块板子上就可以满足功能要求了。所以工业电气系统能实现更复杂的逻辑控制，体积又小，维护起来比继电器容易多了。但是单板机可靠性不行，工业场所需要抗干扰很强，粉尘和震动也很厉害，而且使用汇编语言编程，一般电工都学不会。单片机出来以后，单板机的功能基本上集成到一块芯片上，所以有家叫莫迪康的公司设计了PLC这款产品出来了，硬件考虑了工业场所要求，处理比较稳定可靠，然后软件根据电工的思维习惯，弄出了一套梯形图编程的系统来，和线下的继电器电路差不多，这样通过电脑上“接线”，用符合来替代实物，就可以实现“软”方法来修改逻辑电路了。
KEYENCE KV-B16R CONNECTOR OUTPUT MODULE
KEYENCE KV-B16RA PROGRAMMABLE CONTROLLER
KEYENCE KV-TF40 PROGRAMMABLE CONTROLLER
KEYENCE KV-U4 POWER SUPPLY
KEYENCE KV-U7 POWER SUPPLY
KEYENCE KZ-B16R PROGRAMMABLE CONTROLLER
KEYENCE KZ-C16X PROGRAMMABLE CONTROLLER
KEYENCE KZ-C32X PROGRAMMABLE CONTROLLER
KEYENCE KZ-TC4 PROGRAMMABLE CONTROLLER
KEYENCE MS-H100 POWER SUPPLY
KEYENCE NR-2000 RECORDER
KEYENCE NS-184400-014 MOTOR STEPPER A078
KEYENCE OP-30590 CABLE
KEYENCE OP-34933 TOUCH PANEL DISPLAY
KEYENCE OP-42262 TOUCH PANEL DISPLAY
KEYENCE PK-72 FIBER PHOTOELECTRIC SENSOR
KEYENCE PS-205 SENSOR,FAILSAFE
KEYENCE PS-205 SENSOR,FAILSAFE
KEYENCE PS-206 SENSOR
KEYENCE PS-25 PHOTOELECTRIC SENSOR
KEYENCE PS-26 AMP DISCRETE TYPE PHOTOELECTRIC SWITCH
KEYENCE PS-261 SENSOR
KEYENCE PS-355 KIT, US SEAL
KEYENCE PS-47 PHOTOELECTRIC SWITCH
KEYENCE PS-52 SENSOR PHOTO
KEYENCE PS-55 SENSOR
KEYENCE PS-56R WAFER SENSOR AMPLIFIER
KEYENCE PS-56T PHOTO SENSOR
KEYENCE PS-T2 AMPLIFIER
KEYENCE PS10-102VH SWITCH ELEC/VAC
KEYENCE PS2-61 SEPARATE AMPLIFIER PHOTOERECTRIC SENSOR
KEYENCE PS202 AMPLIFIER SEPARATEPHOTOSW
KEYENCE PST1 AMPLIFIER
KEYENCE PST2 AMPLIFIER PST
KEYENCE PZ-101 FIBER PHOTOELECTRIC SENSOR
KEYENCE PZ-41 PHOTO SENSOR
KEYENCE PZ-42 FIBER PHOTOELECTRIC SENSOR
KEYENCE PZ-51 FIBER PHOTOELECTRIC SENSOR
KEYENCE PZ-511 SENOR ASSY
KEYENCE PZ-51L SNSR-EMTR-PR
KEYENCE PZ-51R FIBER PHOTOELECTRIC SENSOR
KEYENCE PZ2-41 WAFER LOST SENSOR
KEYENCE PZ2-61 SENSOR OPTICAL PZ2-61 1-6C
KEYENCE PZ51L AMPLIFIER INTEGRTDPHOTOSW
KEYENCE SLC-1-A9 SENSOR
KEYENCE TF2-22 TEMP CONTROLLER
KEYENCE VT-L16Z MULTI LINK UNIT
KEYENCE VT2-10TB TOUCH PANEL DISPLAY
KINETICS 101001 valve,diaph,pneu,3/8,pfa 3 way
KINETICS FES-088-B-93 POWER SUPPLY BOARD
KINETICS GS091-00105 INTEL GAS STICK
KINETICS TK-010P PHOTOELECTRIC LIQUID SENSOR
KINETICS UFC-8100 CONTROLLER, PRESSURE, ELECTRON
KITAGAWA 109SB PRECISION GAS DETECTOR TUBES
KITAGAWA 109U PRECISION GAS DETECTOR TUBES
KITAGAWA 156S PRECISION GAS DETECTOR TUBES
KITAGAWA 173SB PRECISION GAS DETECTOR TUBES
KLA/TENCOR 0057977-000 PCB ASSY,CPU 200MHZ,MMX
KLA/TENCOR 033-771116-00 LASER DIODE
KLA/TENCOR 035050 SWITCH, WHITE, BLANK
KLA/TENCOR 040-050175-00 FUSE 10A (PACK OF 10)
KLA/TENCOR 040-663803-000 CIRCUIT BREAKER
KLA/TENCOR 050-450865-00 LAMP, ARC LAMP
KLA/TENCOR 060-450225-00 MOTOR X.Y.Z.U 21
KLA/TENCOR 070-650378-00 POWER SUPPLY 5VDC
KLA/TENCOR 071510 THRU BEAM EMITTER
KLA/TENCOR 09-0550 RELAY 100 AMP SINGLE ? DYNAMITE
KLA/TENCOR 091006 BELT TIMING ELEVATOR
KLA/TENCOR 094226 EPROM
KLA/TENCOR 094650 LASER
KLA/TENCOR 095-450405-00 ARC LAMP-STARTER RELAY
KLA/TENCOR 105317 POWER SUPPLY LASER
KLA/TENCOR 107-009 SCINTILLATOR, 1700
KLA/TENCOR 108910 TIMING BELT
KLA/TENCOR 11-0081-00 PCB INTERFACE BD.
KLA/TENCOR 11-013466 CABLE ASSY,Y-STG,ENCODER
KLA/TENCOR 11-018503 ASSY,CABLE INTERLOCK POWER UPPER P34
KLA/TENCOR 11-1501-99 WIPER SEAL ASSY
KLA/TENCOR 11-5375-95 BEARING (MCGILL BEARING)
KLA/TENCOR MAGNET VALVE
KLA/TENCOR TILT MECHANISM
KLA/TENCOR MOTOR FOR OBJ.LENS REVOLVER
KLA/TENCOR 112976 PCB, MOTOR CONTROL
KLA/TENCOR TRANSMITTER-WAFERSENSOR
KLA/TENCOR LIFT DISTRIBUTOR
KLA/TENCOR LIFT TILT DISTRIBUTOR
KLA/TENCOR LOCKER MOTOR
KLA/TENCOR SCSI HARD DRIVE
KLA/TENCOR PRELIGNET TILT ENCODER
KLA/TENCOR SAFETY-INTERRUTTER
KLA/TENCOR 113115 MOTOR, DC 24V 60 5:1 WBALL BRG
KLA/TENCOR 113387 PCB, MOTOR DRIVER P30
KLA/TENCOR 117-659884-002 DISK DRIVER
KLA/TENCOR 125883 MOTOR, 24 VDC W/GEAR HEAD
KLA/TENCOR 129836 THRU BEAM SENSOR FOR RANDO M INDEXER
KLA/TENCOR 130-800214-00 SOLENOID LINEAR 12VDC
KLA/TENCOR 14630 STYLUS, STANDARD P1/P212.5M RD
KLA/TENCOR 1530A-8-0311 T/C WAFER,1530A-8-K5P
KLA/TENCOR 1630A-8-0070 TC WAFER
KLA/TENCOR 18-009377 THETA,STAGE
KLA/TENCOR 18-012713 MIRROR ASSY,MOVING UV
KLA/TENCOR 18-012716 SHUTTER ASSY, LSR
KLA/TENCOR 18-015519 THETA STAGE
KLA/TENCOR 193909 EYE PIECE LENS
KLA/TENCOR 198773 SWITCHING REGULATOR
KLA/TENCOR 20-0001 PROBE CARD, PCB
KLA/TENCOR 20-0002 CARD, CARD, 16-PIN