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If the following materials and parts are not separated from a PIS according to the5 o' X5 {- B% ?; r3 `2 |
requirements of 6.4.7, then the materials and parts shall not ignite during single fault9 l* ]$ m4 p0 v4 ~
conditions as specified in 6.4.3.2:
9 h/ e6 Z% Y7 C– supplies, consumable materials, media and recording materials; and! f7 t$ A: e, O' y; ~
– parts that are required to have particular properties in order to perform intended functions,0 y7 b! h9 D x8 F' k# O
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics
% ?9 T7 R/ ]. P# w+ {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.- V9 s& i- `9 z) j
Within the fire enclosure, combustible materials that do not comply with the flammability
0 {- `6 ?7 u4 H* R5 H. e xrequirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or; C% o: _: c% j) x4 g8 Y
be made of V-2 class material, VTM-2 class material or HF-2 class foamed material.
\( p6 |3 M' Q! {) a" @8 }These requirements do not apply to:% k( t$ y+ Q9 ^, Q5 Y7 g- }
– parts with a volume of less than 1 750 mm3;& x: l$ @% ^9 S
– parts with a mass of combustible material of less than 4 g;' j% ~: }; l2 x; J) ]. i
– supplies, consumable materials, media and recording materials;9 y" p3 h0 l' E; b% S% Y
– parts that are required to have particular properties in order to perform intended functions,
; {2 q* Z! K& d; Ssuch as synthetic rubber rollers, ink tubes and material requiring optical characteristics;
" ]( C( \" w# M3 T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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