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If the following materials and parts are not separated from a PIS according to the# m, l, f7 _% m: \& w6 }+ Y
requirements of 6.4.7, then the materials and parts shall not ignite during single fault7 o& w r v' c9 ~
conditions as specified in 6.4.3.2:" N6 @& s! B) P+ @
– supplies, consumable materials, media and recording materials; and; M2 w* s9 r) |8 b6 r( g9 k
– parts that are required to have particular properties in order to perform intended functions,. A. k. |7 U- ~3 l1 K( i" O
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics
8 T4 c/ a/ w8 Q8 l0 P! t- sPS2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; n9 C: z; _! b# i; J
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– by providing a fire enclosure as specified in 6.4.8.& V( V8 ~" X' K& s5 d/ O3 G3 @
Within the fire enclosure, combustible materials that do not comply with the flammability
6 F& u* b6 r( Grequirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or
/ X% V; S4 }$ s9 Ube made of V-2 class material, VTM-2 class material or HF-2 class foamed material.7 h' b* H& }$ F; D& v/ i
These requirements do not apply to:
, `" Q3 K0 k) D$ f– parts with a volume of less than 1 750 mm3;+ w) D( ^$ d% v/ n7 ^! Y3 t
– parts with a mass of combustible material of less than 4 g;
4 q" j1 \9 k+ m M- P9 B4 g– supplies, consumable materials, media and recording materials;6 [' {* l4 S8 t4 }' G
– parts that are required to have particular properties in order to perform intended functions,3 W7 [2 k6 }, r# g/ K8 T _ B
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics;- ~; h. [/ ?2 X7 O. 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。; [: u; _0 U' V M& L3 |- Q
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