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If the following materials and parts are not separated from a PIS according to the, f8 v; U% x1 o9 u3 e/ q; Z
requirements of 6.4.7, then the materials and parts shall not ignite during single fault' Y: i& _$ ~' o4 U3 i6 r
conditions as specified in 6.4.3.2:
! b1 _. x3 W& p" C– supplies, consumable materials, media and recording materials; and+ a" U) R( Z, }$ X: e0 G4 R8 T
– parts that are required to have particular properties in order to perform intended functions,
9 M- D. Z a& N5 w, f# ]+ f0 n+ ksuch as synthetic rubber rollers, ink tubes and material requiring optical characteristics* T- I( J2 k/ F3 Y" t
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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# {9 q3 @9 Q+ l5 q– by providing a fire enclosure as specified in 6.4.8.
' w+ r9 Q3 I% J9 H YWithin the fire enclosure, combustible materials that do not comply with the flammability4 h" f a! L0 m+ E9 C3 s
requirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or
# \4 q# m- r! dbe made of V-2 class material, VTM-2 class material or HF-2 class foamed material.0 g7 h' p0 n6 l$ s
These requirements do not apply to:7 P7 q2 B% T( `6 @1 `
– parts with a volume of less than 1 750 mm3;. m- O2 n" F; a, L1 t
– parts with a mass of combustible material of less than 4 g;
: [8 N1 d3 E3 Q0 B% S2 x2 k– supplies, consumable materials, media and recording materials;
7 y* Q) M/ c M. e– parts that are required to have particular properties in order to perform intended functions,
5 @" {+ D2 g3 A; t& G6 C" @such as synthetic rubber rollers, ink tubes and material requiring optical characteristics;
: K* {2 W+ d a' D- b0 u; |6 M: m5 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。+ i4 Z# Z( |8 \2 B' {2 [
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