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If the following materials and parts are not separated from a PIS according to the
+ `. V$ b$ ~/ d# v; U$ c/ }8 Krequirements of 6.4.7, then the materials and parts shall not ignite during single fault# [( \7 m' ?& @" `& ^: h0 n- C
conditions as specified in 6.4.3.2:+ u! N3 t9 R* I1 ?4 F
– supplies, consumable materials, media and recording materials; and4 V* ?. a$ I6 f7 z" \
– parts that are required to have particular properties in order to perform intended functions,
+ A: G* v1 D" D9 ^' l+ p0 t" Rsuch as synthetic rubber rollers, ink tubes and material requiring optical characteristics% \. E8 l8 d. l3 n
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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- O) R, z Y9 B: E2 F* a5 |& }; ?– by providing a fire enclosure as specified in 6.4.8.
" y I1 t% Q$ ]Within the fire enclosure, combustible materials that do not comply with the flammability
( o( K- {. H3 arequirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or
: h0 x" s3 j& Tbe made of V-2 class material, VTM-2 class material or HF-2 class foamed material.
1 s4 b1 \( ^5 D D. a/ y; IThese requirements do not apply to:$ A/ x: I7 |1 k0 ]. f) _
– parts with a volume of less than 1 750 mm3;) z1 C L& V6 D, H# f6 p# g# B
– parts with a mass of combustible material of less than 4 g;
8 n+ I0 L0 G1 w' F5 X6 ^: R; {, `– supplies, consumable materials, media and recording materials; Z3 v! P. {) ?8 _6 g! }. y
– parts that are required to have particular properties in order to perform intended functions, H, F8 ]$ |: w( S/ B3 V. D
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics;
- G3 v" r# f% ^5 g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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