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输入/输出滞后时间又称系统响应时间,是指PLC部输入信号发生变化的时刻至它控制的有关外部输出信号发生变化的时刻之间的时间间隔,它由输入电路滤波时间、输出电路的滞后时间和因扫描工作方式产生的滞后时间这三部分组成。


输入模块的RC滤波电路用来滤除由输入端引入的干扰噪声,因外接输入触点动作时产生的抖动引起的不良影响,滤波电路的时间常数决定了输入滤波时间的长短,其典型值为10ms左右。


输出模块的滞后时间与模块的类型有关,继电器型输出电路的滞后时间一般在10ms左右;双向晶闸管型输出电路在负载通电时的滞后时间约为1ms,负载由通电到断电时的滞后时间为10ms;晶体管型输出电路的滞后时间一般在1ms以下。


PLC总的响应延迟时间一般只有几十ms,对于一般的系统是无关紧要的。要求输入输出信号之间的滞后时间尽量短的系统,可以选用扫描速度快的PLC或采取其他措施。

Lot of 9 Cisco WS-C2950ST-24-LRE Catalyst 2950 2 10/100/1000 2 SFP Switch

1  Lot of 9 Cisco WS-C2950ST-24-LRE Catalyst 2950 2 10/100/1000 2 SFP Switch

Cisco Meraki MX64 A90-32100-B MX64-HW Cloud Security Appliance Managed Firewall

1  Cisco Meraki MX64 A90-32100-B MX64-HW Cloud Security Appliance Managed Firewall

Zebra LP2844-Z 284Z-20300-0001 Direct Thermal Barcode Label Printer Parallel USB

Cisco2911-VSEC/K9-DataK9 UCK9 PoE Voice Security Router 512D 256F PVDM3-32

Cisco2911-VSec/K9 3 Port Voice/Security Bdle Router 512MB/256MB

Cisco Meraki MX84 10x 10/100/1000Base-T 2x SFP Cloud Managed Security Appliance

APC AP9631 NMC Network Management Card 2 AP9335T Environmental Monitoring AP9630

Latest Firmware and All Accessories. 2Day

 APC AP9631 NMC Network Management Card 2 AP9335T Environmental Monitoring AP9630

Cisco VWIC3-2MFT-T1/E1 2-Port T1/E1 Multiflex Trk Voice/WAN Interface Module

1  Cisco VWIC3-2MFT-T1/E1 2-Port T1/E1 Multiflex Trk Voice/WAN Interface Module

Cisco WS-C3560X-48P-S Catalyst 3560X 48-Ports Gigabit PoE Ethernet Switch

 Cisco WS-C3560X-48P-S Catalyst 3560X 48-Ports Gigabit PoE Ethernet Switch

Zebra P1027135-024 GX430T Barcode Printer Main Logic Board USB Serial Ethernet

Cisco CP-BEKEM IP Ph8800 Key Expansion Module for Cisco 8851 or 8861

Datamax PHD20-2245-01 KRA-168-8TBB4-DMX1 H-Class H6 Printhead 203dpi H-6210

SNOM 821 VoIP Wireless Ph12-Line LCD Gigabit SIP  Microsoft OCS 2346 -

Cisco CP-BEKEM IP Ph8800 Key Expansion Module for Cisco 8851 or 8861

Eltron P310C Color Dye Sublimation Thermal Single Sided ID Card Printer Parallel

Lot of 10 Cisco C3KX-PWR-715WAC AC Power Supply Module for Cisco 3560-X 3750-X

 Lot of 10 Cisco C3KX-PWR-715WAC AC Power Supply Module for Cisco 3560-X 3750-X

Cisco VWIC3-1MFT-T1/E1 1-Port T1/E1 Multiflex Trk Voice/WAN Interface Card

Zebra LP2844 120627-061 Direct Thermal Barcode Label Printer Parallel USB 203dpi

Zebra LP2844 2844-20300-0001 Direct Thermal Barcode Label Printer USB Parallel

 Zebra LP2844 2844-20300-0001 Direct Thermal Barcode Label Printer USB Parallel

Intermec 1-971156-005 Main Logic Board Serial Network USB for PM4i PX4i PX6i

Intermec 1-971157-002 EasyLAN Wireless WiFi Network Kit for PX4i PX6i

Cisco WS-C3750E-24TD-S Catalyst 3750E 24x 10/100/1000 Ethernet Switch Stackable

 Cisco WS-C3750E-24TD-S Catalyst 3750E 24x 10/100/1000 Ethernet Switch Stackable

Lot of 12 Cisco Meraki MR34-HW MR34 Cloud-Managed Dual Band Access Point

Lot of 6 Cisco WS-C2950G-12-EI Catalyst 2950 12-Port 10/100/1000 Ethernet Switch

APC AP7530 Basic Rack PDU Zero U 20A 120V 1920VA (24)5-20, L5-20P REF

Zebra LP2844PSAT 120598-001 Direct Thermal Barcode Label Printer Parallel USB

Cisco ASA-180W-PWR-AC 341-0094-03 AC Power Supply ASA5510/20/40/50

Cisco WS-C3750X-24T-L Catalyst 3750X 24-Ports 10/100/1000Base-T Ethernet Switch

 Cisco CP-8841-K9 5 Programmable Line Key 5 inch. Color VoIP PhSIP

 Cisco Meraki MR52 MR52-HW Dual-Band Wave 2 Indoor Wireless Access Point

  Cisco Meraki MR52 MR52-HW Dual-Band Wave 2 Indoor Wireless Access Point

Lot of 7 Cisco Meraki MR14 600-10030-C Dual-Radio 802.11n Wireless Access Point

 Cisco Meraki MR42 Dual-band 802.11ac Wave 2 Wireless Access Point

Cisco WS-C2970G-24TS-E Catalyst 3750G 24-10/100/1000 ports 4 SFP Ethernet Switch

 Cisco WS-C2970G-24TS-E Catalyst 3750G 24-10/100/1000 ports 4 SFP Ethernet Switch

Eaton TR5362CHGN Arrow Hart Half Control Duplex Receptacle 5-20R Green Pack 10

 Cisco AIR-CAP2702I-A-K9 Aironet 2700 Dual-band Wireless Access

Lot of 10 AudioCodes 450HD UC450HDEG 8 Line IP PhBase Only

Cisco PWR-2911-POE AC Power Supply with Power Over Ethernet for 2911 Routers

Cisco AIR-CAP702I-A-K9 Aironet 700 Series Dual-band 802.11a/g/n Access Point

1  Cisco AIR-CAP702I-A-K9 Aironet 700 Series Dual-band 802.11a/g/n Access Point

Paxar Monarch 12678301 Printhead Replacement 9820 9825 9830 9835 9840 9850 9855

, , Worldwide, 203DPI

Psion Teklogix PTX-MLP 3040 33049 Mobile Label Printer 33049 WiFi Network 203DPI

Cisco ESW-520-24P-K9 Small Business Pro 24-Ports 10/100 PoE  4 SFP Switch

 Cisco ESW-520-24P-K9 Small Business Pro 24-Ports 10/100 PoE  4 SFP Switch

Cisco Meraki MS320-24P 24x 10/100/1000 4x 10Gb SFP Cloud Managed Switch

CISCO ASA5585-PWR-AC 1200W AC POWER SUPPLU FOR ASA5585-X MODELS

Datamax DPR51-2357-00 51-2357-00 AC Power Supply for M-4208 4206 4212 4308 4210

1  Datamax DPR51-2357-00 51-2357-00 AC Power Supply for M-4208 4206 4212 4308 4210

Zebra G105917-002 LP/TLP2844-Z Logic Board W/ Network, USB and Serial Interfaces

Cisco WS-C2960S-F24TS-L Catalyst 2960-SF 24 Port 10/100 2 SFP Ethernet Switch

Cisco WS-C3850-48U-L Catalyst 3850 Gigabit UPOE LAN Base Ethernet Switch

Dual Power Supplies (PWR-C1-1100WAC)

Cisco AIR-CAP2602I-B-K9 Aironet 2600 Series Dual-band 802.11a/g/n Access Point

Cisco WS-C3850-48F-L Catalyst 3850 48x 10/100/1000 POE Ethernet Switch 1100WAC

 Cisco WS-C3850-48F-L Catalyst 3850 48x 10/100/1000 POE Ethernet Switch 1100WAC

Cisco CP-7970G 7970G 8 Button (Line) VoIP Color LCD Touch Screen IP Ph

 Cisco CP-7970G 7970G 8 Button (Line) VoIP Color LCD Touch Screen IP Ph

Cisco WS-C3850-48P-S Catalyst 3850 48-Port Gigabit PoE Ethernet Switch 715WAC

Cisco CP-8831-BASE-S ified IP Conference Ph8831 Base VoIP

Zebra 34901-021M 33000 Main Logic Board Parallel Serial 64MB 105SL

1  Zebra 34901-021M 33000 Main Logic Board Parallel Serial 64MB 105SL

Zebra P1033605-001 29883-001 Wireless Plus 802.11 b/g Radio for S4M

As Is Boca Systems Mini Plus Ticket Printer Parallel Serial Network USB Black

For Parts and Repair

As Is Boca Systems Mini Plus Ticket Printer Parallel White

Cisco CP-8865-K9 IP Ph8865 5 Line Digital Camera IP Video PhSIP

 Cisco CP-8865-K9 IP Ph8865 5 Line Digital Camera IP Video PhSIP

AudioCodes AUC-EXPANSION IT 5" Color Expansion Module for AudioCodes 450HD

4 Zebra Z0433985W Thermal Transfer Ribbon 4.33inch x 985ft 110mm x 300M

Intermec 1-971646-51 1-971646-01 EasyLAN WiFi Wireless Interface PX4i PX6i PF4i

As Is Fargo HDP 089152 Lamination Module Dual-Side for HDP5000 ID Card Printer

 As Is Fargo HDP 089152 Lamination Module Dual-Side for HDP5000 ID Card Printer

Intermec 234-065-003 Power Supply Electronics Assembly Board for PM43

1  Intermec 234-065-003 Power Supply Electronics Assembly Board for PM43

Cisco AIR-AP3802I-B-K9 Aironet 3800 100/1000/2500/5000 PoE/mGig Access Point

 Cisco AIR-AP3802I-B-K9 Aironet 3800 100/1000/2500/5000 PoE/mGig Access Point

Cisco SM-ES3-24-P 23 ports FE 1 port GE PoE EtherSwitch for 2900 and 3900 Router

Lot of 10 Intermec 13044304 Genuine Thermax TMX3201 4.33 3588 Black Ribbon

APC AP9630 NMC Smart-UPS Network Management Card 2 Latest Firmware Serial Cable

 APC AP9630 NMC Smart-UPS Network Management Card 2 Latest Firmware Serial Cable

Cisco WS-C3560X-48T-S Catalyst C3560X 48-10/100/1000 Ethernet Ports Switch

Cisco CP-7841-K9 7841 4 Line VoIP 2 Port 10/100/1000 IP PhSIP SRTP

 Cisco CP-7841-K9 7841 4 Line VoIP 2 Port 10/100/1000 IP PhSIP SRTP

Cisco WS-C2960S-48LPS-L Catalyst 2960S 48-Ports PoE Gigabit Switch

 Cisco WS-C2960S-48LPS-L Catalyst 2960S 48-Ports PoE Gigabit Switch

Cisco C3KX-NM-1G Four GbE Port Network Module for Catalyst 3560x  3750x

Zebra 79501-011 79823 Internal Network Card for Zebra ZM400 ZM600

 Zebra 79501-011 79823 Internal Network Card for Zebra ZM400 ZM600

Lot of 6 Cisco C3KX-PWR-350WAC AC Power Supply Module for Cisco C3560-X C3750-X

 Lot of 6 Cisco C3KX-PWR-350WAC AC Power Supply Module for Cisco C3560-X C3750-X

Cisco 1841-T1SEC/K9 WIC-1DSU-T1-V2 2-Port 10/100 Router 256D/128F 15.0(1)M8 IOS

Datamax OPT78-2657-13 DMXrfNet II Wired/Wireless Network WiFi I-4308 4212 4210

Intermec 1-971630-51 Main Logic Board USB Network 16MB/4MB for PX4i PX6i PF4i

Lot of 10 Cisco AIR-LAP1131AG-A-K9 Aironet 1131AG Lightweight Wireless Access

Cisco VWIC-2MFT-E1 2-Port RJ-48 Multiflex Trk-E1 Voice Interface Module Card

1  Cisco VWIC-2MFT-E1 2-Port RJ-48 Multiflex Trk-E1 Voice Interface Module Card

Intermec 160-000196-000 1-971171-002 PCB Main Logic Board USB Network PD42

Cisco CP-9971-C-CAM-K9 ified IP Ph6 Line Color Touchscreen USB Camera SIP

 Cisco CP-9971-C-CAM-K9 ified IP Ph6 Line Color Touchscreen USB Camera SIP

Datamax DPR78-2694-02 PB243201 Large 240 X 320 LCD Screen for H-Class Printers

Cisco PWR-2921-51-AC Power Supply for Cisco 2921/2951

Intermec 1-971030-002 CPU Main Logic Board PM4i EasyCoder Printers 1-971130-900

, 30 Day .

Cisco WS-C3560X-48T-L Catalyst C3560X 48-Ports 10/100/1000 Ethernet Switch

 Cisco WS-C3560X-48T-L Catalyst C3560X 48-Ports 10/100/1000 Ethernet Switch

Cisco PWR-3900-POE AC Power Supply with Power Over Ethernet for Cisco 3900

Cisco WS-C3560-24PS-S Catalyst 3560 24-Port 10/100 PoE 2 SFP Ethernet Switch

Cisco PWR-C1-715WAC Power Supply for Cisco 3850  9300 Series Switch

 Cisco PWR-C1-715WAC Power Supply for Cisco 3850  9300 Series Switch

Cisco WS-C3750X-48PF-S Catalyst C3750X 48-Ports 10/100/1000 PoE with 1100W AC

 Cisco WS-C3750X-48PF-S Catalyst C3750X 48-Ports 10/100/1000 PoE with 1100W AC

Cisco WS-C3560-24TS-S Catalyst 3560 24-Port 10/100 2 SFP Uplink Ethernet Switch

 Cisco WS-C3560-24TS-S Catalyst 3560 24-Port 10/100 2 SFP Uplink Ethernet Switch

Zebra G20063M 29691-002 S4M Internal 10/100Base-T Ethernet Print Server Network

Zebra 34901-031M Main Logic Board for 110Xi-III Plus Printer USB Parallel 4MB

, , .

Intermec 1-207084-800 Internal Rewinder Kit EasyCoder PD41 PD42 Printer

Cisco CP-7961G-GE ified VoIP 6 Programmable Button PoE Gigabit IP Ph

1  Cisco CP-7961G-GE ified VoIP 6 Programmable Button PoE Gigabit IP Ph

Cisco2921-V/K9 3 Port Voice Bdle Gigabit 1 SFP Router 512MB/256MB PVDM3-32

Cisco WS-C3750G-48TS-S 48 Port 10/100/1000 4 SFP Gigabit Stackable Switch, 1U



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