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參數(shù)資料
| 型號： | PCI-DIO |
| 英文描述： | KARTE E/A 32 KANAL PCI BUS |
| 中文描述： | KARTE E / A值32卡納爾PCI總線 |
| 文件頁數(shù)： | 19/21頁 |
| 文件大小： | 83K |
| 代理商： | PCI-DIO |
Chapter 4
Technical Specifications
Page 15
01270192.doc
Electromagnetic Compatibility (EMC)
This product meets the requirements of the European EMC Directive
(89/336/EEC) and is eligible to bear the CE mark.
It has been assessed operating in our standard industrial PC. However, because
the board can be installed in a variety of computers, certain conditions have to
be applied to ensure that the compatibility is maintained. It meets the
requirements of EN55022:1995 for a Class A product subject to those
conditions.
The board must be installed in a computer system which provides screening
suitable for an industrial environment.
Any recommendations made by the computer system manufacturer/supplier
must be complied with regarding earthing and the installation of boards.
The board must be installed with the backplate securely screwed to the
chassis of the computer to ensure good metal-to-metal (i.e. earth) contact.
Most EMC problems are caused by the external cabling to boards. It is
imperative that any external cabling to the board is totally screened, and that
the screen of the cable connects to the metal end bracket of the board and
hence to earth. It is recommended that round screened cables with a braided
wire screen are used in preference to those with a foil screen and drain wire.
Use metal connector shells which connect around the full circumference of
the screen; they are far superior to those which earth the screen by a simple
“pig-tail”. Standard ribbon cable will not be adequate unless it is contained
wholly within the cabinetry housing the industrial PC.
Ensure that the screen of the external cable is bonded to a good RF earth at
the remote end of the cable.
Failure to observe these recommendations may invalidate the EMC compliance.
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