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If the following materials and parts are not separated from a PIS according to the, }2 F: A% `% d( x! D# s% \
requirements of 6.4.7, then the materials and parts shall not ignite during single fault
& j, Q# Z4 b; b2 L. m. C( Bconditions as specified in 6.4.3.2:
1 f2 m- I' a& B7 Q }6 y: Z– supplies, consumable materials, media and recording materials; and6 U) u* @* q0 ]; k; F4 ]. i
– parts that are required to have particular properties in order to perform intended functions,
) B! R3 X5 B6 Tsuch as synthetic rubber rollers, ink tubes and material requiring optical characteristics
( G" @2 V5 R' p: q2 P% U! a, dPS2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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/ q: w7 j) o$ X. Y7 V/ t– by providing a fire enclosure as specified in 6.4.8.$ w2 w; e& C0 y# U# t
Within the fire enclosure, combustible materials that do not comply with the flammability) _; {" [; e3 Z" E+ G
requirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or/ A7 X1 v: \7 q! l+ v! _- w# A! s
be made of V-2 class material, VTM-2 class material or HF-2 class foamed material.
% O+ L) l" r3 _These requirements do not apply to:- x2 b# _, b4 z+ T$ h
– parts with a volume of less than 1 750 mm3;
5 B( A2 c1 f! ^. y- J– parts with a mass of combustible material of less than 4 g;
* x2 @3 F+ O) p) n9 J% \8 n0 M3 W* l+ l– supplies, consumable materials, media and recording materials;
' ]$ [, f( f' k& k8 ^4 t% n7 e– parts that are required to have particular properties in order to perform intended functions,4 O' A F7 t( Z5 X* K% }/ o
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics;
& }: v& e3 z4 _, a$ N; e" _9 O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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