西门子6SN1145-1BA01-​​0BA1参详

西门子6SN1145-1BA01-0BA1参详

西门子6SN1145-1BA01-0BA1参详

西门子6SN1145-1BA01-0BA1参详

功能模块独立的概念是功能模块化、抽象、信息隐蔽和局部化概念的直接结果。

抽象是指对事物、状态或过程之间所存在的某些相似的方面集中和概括起来，而暂时忽略他们之间的差异，即考虑抽象事物的本质特征而暂时不考虑他们的细节。信息隐蔽是指再设计功能模块时使得一个功能模块内所包含的信息（过程或数据），对于不需要这些信息的功能模块来说是不能访问的。信息隐蔽原则对于以后在软件维护期间修改软件时会带来·大的好处，因为大量数据和过程是软件的其他部分所不能觉察的，因而再对某个功能模块修改时就不大会影响到软件的其他部分，所谓局部化是指把一些关系密切的软件元素在物理位置上彼此靠近。

功能模块独立性是通过制定具有单一功能并且和其他功能模块没有过多联系的功能模块来实现的。每个功能模块只涉及该软件要求的一个具体子功能，而且与软件结构的其他部分的接口是简单的。

功能模块独立性好的软件接口简单，易于编制，独立的功能模块也比较容易测试和维护，限制了功能模块之间由于联系紧密而引起的修改副作用。独立性是保证软件质量的重要因素。

6AV2124-1MC01-0AX0

6SE7031-6EB87-2DA1-M08

6SL3210-1PE32-5UL0

DCS502B0140-41-2102000-000000000

DCS800-S02-0680-05

DCS800-S02-0350-05

DCS800-S02-0820-05

PA003152H1SSS

MDX61B0110-5A3-4-00

6FC5210-0DF22-2AA0

6ES7414-3EM07-0AB0

8201-HI-IS

8215-DO-IS

8220-DI-IS

8230-AI-IS

8922-RB-IS

6EP4131-0GB00-0AY0    1

3RM1007-1AA04   1

3RM1002-1AA04   1

6ES7231-5ND32-0XB0    2------

6ES7232-4HD32-0XB0   1------

6ES7222-1HF32-0XB0   1-------

6ES7222-1BD30-0XB0  1------

6EP4134-3AB00-2AY0   1

6SL3210-1KE12-3AF2   1

6SL3210-1KE14-3AF2  1

6SL3210-1PE16-1UL1   1

6SL3210-1KE18-8AF1   1 

6SL3210-1KE11-8AF2    1

3SU1900-0BC31-0DA0   1

3SU1001-1HB20-0AA0    1

3SU1550-1AA10-1CA0   2

6AV7231-0CC41-2CA0   1

6ES7226-6RA32-0XB0   1-----

ABB电源模块

3BHE013431R0001 KUD181 A01------

ABB 电源板 086370-001 数量1块---------

ABB 086370-501   1个

1VCF337221R1442 4

1VCF337221R1643 2

6SY7000-0AB25  1个  

6SY8101-0AB65   5个 

6SY7000-0AA63   2个

6ES7134-6PA00-0CU0   6

6ES7193-6BP00-0BU0    6

6ES7134-6PA20-0BD0    60

Cisco Compatible X2-10GB-LX4 Transceiver Fast Shi

Cisco Compatible WS-G5487 GBIC Module w/

Cisco CISCO7201 7200 SERIES 4-Port Gigabit Wired Router AVAILABLE

Cisco CISCO3945-V/K9 3945 Integrated Services Router 

Cisco CISCO3945E/K9 3945E Gigabit Wired Router ASK FOR QUANTITY

Cisco CISCO3945/K9 3945 3-Port Gigabit Wired Router QUANTITY AVAIL

Cisco CISCO3945/K9 3945 3-Port Gigabit Wired Router 1 Year 

Cisco CISCO3925-V/K9 3925 Integrated Services Router AVAILABLE 

Cisco CISCO3925-SEC/K9 3925 Integrated Services Router

Cisco CISCO3925/K9 3925 3-Port Gigabit Wired Router 

CISCO CISCO3845-WAE/K9 w/NMEWAE-502 [  ]

CISCO CISCO3845-WAE/K9 w/NMEWAE-502 [  ]

CISCO CISCO3845-VMSS/K9 Router 

CISCO CISCO3845-VMSS/K9 Router 

CISCO CISCO3845-MB Cisco3845 Motherboard 1YR - ASK 4 QTY

CISCO CISCO3845-MB Cisco3845 Motherboard 1YR - ASK 4 QTY

CISCO CISCO2951-V/K9 Cisco 2951 Integrated Services Router 

Cisco CISCO2921-V/K9 2911 3-Port Gigabit Wired Router

Cisco CISCO2921/K9 2921 3-Port Gigabit Wired Router SHIP TO

Cisco CISCO2921/K9 2921 3-Port Gigabit Wired Router

Cisco CISCO2911-V/K9 2911 Integrated Services Router AVAILABLE

Cisco CISCO2911-SEC/K92911 3-Port Gigabit Wired Router QUANTITY AVL

Cisco CISCO2911/K9 2911 Integrated Services Router HWIC CompactFlash Card PVDM 

Cisco CISCO2901-V/K9 2901 Router QUANTITY AVAILABLE

Cisco CISCO2901-SEC/K9 2901 2-Port Gigabit Wired Router AVL

CISCO CISCO2851-WAE/K9 w/ NME-WAE-502 

CISCO CISCO2851-WAE/K9 w/ NME-WAE-502 

CISCO CISCO2821-WAE/K9 Router w/ NME-WAE-502 

Cisco CISCO2821SEC/K9 2821 Gigabit Wired Router QUANTITY AVAILABLE

Cisco CISCO2821-SEC/K9 2821 Gigabit Wired Router 1 Year 

Cisco CISCO2811-SEC/K9 2811 2-Port 10/100 Wired Router 1 Year 

Cisco CISCO2651XM 2651XM 100 Mbps 10/100 Wired Router 1 YEAR 

CISCO CISCO2621XM-DC Router 

Cisco CISCO1941/K9 1941 2-Port Gigabit Wired Router SHIP TO

CISCO CISCO1841-ADSL2 RouterAvailable 

CISCO CISCO1841-ADSL2 RouterAvailable 

CISCO CISCO1841-ADSL WIC-1ADSL Router 

CISCO CISCO1841-ADSL WIC-1ADSL Router 

Cisco CISCO1812/K9 Router 

Cisco CISCO1812/K9 Router 

Cisco CISCO1801/K9 1801 8-Port 10/100 Router 1 YEAR 

Cisco CISCO1801 1801 Integrated Services Router 1 YEAR 

Cisco CCNA Lab Kit Trust the Best for Your Cisco Certification Exam. TESTED 

Cisco CCNA Lab 3 x 2610  2x WS-C2950 T1-Frame Relay

Cisco CCNA CCNP home Lab Kit 1-Year  

Cisco CCNA  CCNP Lab 2x 3620 1x 2611XM 2x 2950-24

Cisco CCNA  CCNP best home Lab kit 2x 3640 1x2611XM

Cisco CCENT CCNA the best home lab kit 1-Year 

Cisco CCENT CCNA Home Lab Kit  for Certification Exams

Cisco CCENT  CCNA Lab 2x 1720 1x 2620 2x 2950-24

Cisco CCENT  CCNA Lab |1x 3640 4x 2501 2x 2950-24

Cisco CCENT  CCNA Lab |1x 3640 4x 2501 2x 2950-24

Cisco Catalyst WS-C4948-S 48-Ports Rack Mountable Switch

Cisco Catalyst WS-C4948E-S 48-Ports Rack Mountable Switch Managed QTY