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If the following materials and parts are not separated from a PIS according to the
0 I1 w5 p, P" mrequirements of 6.4.7, then the materials and parts shall not ignite during single fault
' C" o9 k- M% I' tconditions as specified in 6.4.3.2:& L# X+ h( B/ u, C5 {# H3 F
– supplies, consumable materials, media and recording materials; and
3 d! K$ C- r" A8 t% p8 i3 Y– parts that are required to have particular properties in order to perform intended functions,( K. o2 f' a' X( o' l O: G
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics
' p$ D. ?+ @' k. K0 c" KPS2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
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– by providing a fire enclosure as specified in 6.4.8.% \3 E% ~, M+ G( o' }( Z
Within the fire enclosure, combustible materials that do not comply with the flammability) ]7 P" e- v V0 L5 \7 G
requirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or6 ~0 p* T* C8 \3 U
be made of V-2 class material, VTM-2 class material or HF-2 class foamed material.1 h l# c+ z; p4 x" I
These requirements do not apply to:
6 v0 ^; d n/ h$ T– parts with a volume of less than 1 750 mm3;/ @$ l: S# l2 X! K9 _# m/ l
– parts with a mass of combustible material of less than 4 g;
4 g3 E" x* c( D1 C& n+ e4 a$ j) T– supplies, consumable materials, media and recording materials;
( [4 o0 P. A1 j8 E" N' k# Z– parts that are required to have particular properties in order to perform intended functions,6 H8 z; [3 x) i* O5 y
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics;8 w4 I" z, u$ e, z/ Z* G, _* S& ?/ d
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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