PLC的扫描工作方式引起的延迟可达2－3个扫描周期。对于大多数应用场合来说，PLC的响应速度都可以满足要求，不是主要问题。然而对于某些个别场合，则要求考虑PLC的响应速度。为了减少PLC的I／O响应的延迟时间，可以选用扫描速度高的PLC，或选用具有高速I／O处理功能指令的PLC，或选用具有**响应模块和中断输入模块的PLC等。
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Allen Bradley 800 EM-F Flush Push Button (Lot of 3)
Allen Bradley 8000 IOABZ NSPP 80000 IOABZ Polar Module 24VDC Digital
Allen Bradley 8000AF Resolver/Induction SYN Servo Module
Allen Bradley 8000MB2 Memory Module 64K with bubble interface
Allen Bradley 8000-MDG8 PC Board Memory Bubble Intel IMB268-4
Allen Bradley 8000-MDG8 PC Board Memory Bubble Intel IMB268-4
Allen Bradley 8000VADZ CONTROL/KEYBOARD MODULE,
Allen Bradley 800EP-LU2C21 Multi-Operator Start / Stop Pushbutton w/Illumination
Allen Bradley 800FD-SM22X10 Selector Switch, 2 Position, 300V, N.O.
Allen Bradley 800FD-SM32X20 Selector Switch, 3 Position, 300V, 2NO
Allen Bradley 800FP-LU2E3F4 Multi-Function Push Button
Allen Bradley 800F-X10 Ser A Maintained 2 Position Selector Switch 690V 10A NO
Allen Bradley 800H-16JRG2KB7AX Series-F Green Maintained Selector Switch *See De
Allen Bradley 800H-QR24R (Series F) Red Pilot Light, Input Voltage: 24VAC/DC
Allen Bradley 800MR-A1 Green Push Button
Allen Bradley 800MR-QB24 Illuminated Green Push-Button 24 AC/DC
Allen Bradley 800MS-CTP16S Push Button 110V
Allen Bradley 800M-XA Ser-D Illuminated Red Pilot Light, 24V
Allen Bradley 800M-XD1R 1N.O. Logic Reed Contact Block
Allen Bradley 800M-XD2R 1 NC Logic Reed Contact Block
Allen Bradley 800T-16JX2KB7 Series-T Green Illum Select Switch 120V 50/60Hz
Allen Bradley 800T-D Mushroom Head E-Stop Button w/800T-XD2 Contact Block 1NC
Allen Bradley 800T-E15A Cylinder Lock Push Button
Allen Bradley 800T-E16A Cylinder Lock Push Button
Allen Bradley 800T-E16B Cylinder Lock Push Button Unit
Allen Bradley 800T-FD16A Maintained Contact Push Button
Allen Bradley 800T-FXJ6A5 Push/Pull Button W/Hammond 1590-V Enclosure
Allen Bradley 800T-FXP16WD4 Illuminated Push Button
Allen Bradley 800T-FXQ24 A1 Illuminated E-Stop Push/Pull Pushbutton 24VAC/DC RED
Allen Bradley 800T-FXQ24 Red Illuminated Pushbutton, Voltage: 24VAC/DC
Allen Bradley 800T-FXTQH24RA5 Series-T Red Emergency Stop Twist Pushbutton
Allen Bradley 800T-H2B Selector Switch Unit
Allen Bradley 800T-H2D1 Selector Switch
Allen Bradley 800T-H4B Selector Switch Unit
Allen Bradley 800T-H5B Selector Switch Unit
Allen Bradley 800T-J17KE7B Selector Switch
Allen Bradley 800T-J18B Selector Switch
Allen Bradley 800T-J2K07 Selector Switch
Allen Bradley 800T-J6B Selector Switch
Allen Bradley 800T-K2A Selector Switch
Allen Bradley 800T-N2KK4 Selector Switch
Allen Bradley 800T-P15B Pilot Light
