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If the following materials and parts are not separated from a PIS according to the7 N5 H( F4 E3 ]
requirements of 6.4.7, then the materials and parts shall not ignite during single fault
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– supplies, consumable materials, media and recording materials; and
1 ^5 b$ l' @1 L0 A( D# y2 d– parts that are required to have particular properties in order to perform intended functions,, c# ?. }2 F: @2 e& g+ k# L! y& _4 a& N
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics S/ V0 a1 T6 r! s
PS2中有明确写到补给材料,介质或消耗材料要与PIS进行隔离,要满足5或13的要求,否者用6.4.3.2的单一故障去豁免! [7 k7 ]2 }8 P; W! ?9 p9 y
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– by providing a fire enclosure as specified in 6.4.8.
" A* ~& J5 k4 F6 T6 d+ TWithin the fire enclosure, combustible materials that do not comply with the flammability
. w% O# E! {6 E5 |8 vrequirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or
2 H$ Z, U; B. M, B8 Vbe made of V-2 class material, VTM-2 class material or HF-2 class foamed material., B' `6 d$ e# s( z
These requirements do not apply to:
" e2 z% v" _% t– parts with a volume of less than 1 750 mm3;( U% |. j) G9 Y6 O* V
– parts with a mass of combustible material of less than 4 g;
2 }4 \% ^3 G6 L– supplies, consumable materials, media and recording materials;' U- h- c7 l2 J
– parts that are required to have particular properties in order to perform intended functions,
* O, w+ t4 h. R, f+ ?! qsuch as synthetic rubber rollers, ink tubes and material requiring optical characteristics;
6 V: g: T5 Q! p- p: `按6.4.8的规定提供防火防护外壳(V-1),不符合PS2或PS3电路一部分的可燃性材料应符合第S.1章的可燃性试验或应用V-2级材料、VTM-2级材料或HF-2级泡沫材料制成,那么这个时候不考虑PIS的距离的问题,如果材料不符合上述要求,用V-0防火防护外壳或者材料安装在V-1印制板上(考虑PIS距离要求),不知道我的理解是否正确,是因为补给材料,介质或消耗材料无法满足V-2或S.1的要求,所以说不适用吗??那么一个终端产品,定期要更换这些材料,是否像PS2要与PIS进行隔离,个人认为要的。
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