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If the following materials and parts are not separated from a PIS according to the
: z! [0 i5 b% m, U. o4 frequirements of 6.4.7, then the materials and parts shall not ignite during single fault# {& _, j* D# }- t j- g$ f! z4 S& D
conditions as specified in 6.4.3.2:/ f6 `6 h. |, P- b% ]2 t4 ~
– supplies, consumable materials, media and recording materials; and
" C- g" J# E0 v– parts that are required to have particular properties in order to perform intended functions,
; k7 H1 }# }" \6 T I0 [( Q* w0 qsuch as synthetic rubber rollers, ink tubes and material requiring optical characteristics
( {- u& r9 w7 \* u4 [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
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– by providing a fire enclosure as specified in 6.4.8.
6 b; M* r- ^9 J$ jWithin the fire enclosure, combustible materials that do not comply with the flammability( v( y3 Q: x- V& ~
requirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or
* @# b3 @- f9 p) l/ fbe made of V-2 class material, VTM-2 class material or HF-2 class foamed material.
" j0 b O8 w+ g" M. C5 wThese requirements do not apply to:5 p4 Y' G' i) g. E+ u/ g
– parts with a volume of less than 1 750 mm3;) K! D3 V, g) s6 w6 |, a8 T
– parts with a mass of combustible material of less than 4 g;
) b6 o2 x! E6 @! X: r– supplies, consumable materials, media and recording materials;
) A& n+ D C) j7 v3 P– parts that are required to have particular properties in order to perform intended functions,9 N8 e& d' T$ {5 |( c
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics;
! H0 u2 n; a, Q" B3 c3 v+ C$ L% r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。" d* ?& ]$ r) |" I! O% K. X: [
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