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If the following materials and parts are not separated from a PIS according to the* z0 O% u! u! B9 S8 I; j2 d
requirements of 6.4.7, then the materials and parts shall not ignite during single fault1 b$ f& U: L8 x/ T
conditions as specified in 6.4.3.2:( b/ f* w6 F/ b
– supplies, consumable materials, media and recording materials; and1 `3 [; v7 A4 r1 x& m
– parts that are required to have particular properties in order to perform intended functions,
) o9 a8 A- R8 V" x7 F. K! u, b; Lsuch as synthetic rubber rollers, ink tubes and material requiring optical characteristics
5 M+ ^5 f! k/ D$ RPS2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.% @' V0 b, _$ \1 a; i6 {
Within the fire enclosure, combustible materials that do not comply with the flammability
, C+ b3 r+ U3 Grequirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or
6 m* y, ?2 A8 u Z _/ i/ abe made of V-2 class material, VTM-2 class material or HF-2 class foamed material.; T6 j; U/ q; p5 l% V3 W& B1 O% R
These requirements do not apply to:
! V% J$ @5 r" t/ \– parts with a volume of less than 1 750 mm3;
1 }. {0 n3 x/ C' Z4 n– parts with a mass of combustible material of less than 4 g;1 {! Z& d. l) j* d6 B) _3 `
– supplies, consumable materials, media and recording materials;
. s w/ M& X) A3 \% C$ O4 j6 J6 ]– parts that are required to have particular properties in order to perform intended functions,
, f! J5 o* O3 {, S3 X- ^3 O) t& Dsuch as synthetic rubber rollers, ink tubes and material requiring optical characteristics;1 E- a! h# u( A! u+ }0 N
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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