參數(shù)資料
型號(hào)： WD-1
英文描述： MULTI-FUNCTION WATCHDOG CARD
中文描述： 多功能看門狗卡
文件頁(yè)數(shù)： 12/49頁(yè)
文件大?。?/td> 569K
代理商： WD-1
Page 4
Specifications
Page 4
Blue Chip Technology Ltd.
01271013.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 a Blue Chip Technology Icon 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 for an industrial environment (Class A product) subject
to those conditions.
The board must be installed in a computer system which provides screening
suitable for the 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
important that any external cabling to the board is totally screened, and that
the screen of the cable connects to earth at both ends of the cable. It is
recommended that round screened cables with braided wire screen are used
in preference to those with foil screen and drain wire. With the terminal
block connection to the card there is no space available for an earth point on
the board mounting bracket. It is recommended that the screen be connected
to the metal body of the PC (and hence earth) by the shortest possible “pig-
tail”. The BCT Icon chassis has these available adjacent to the expansion
area. Unscreened cable will not be adequate unless it is contained wholly
within the cabinetry housing the industrial PC and carefully routed.
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