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If the following materials and parts are not separated from a PIS according to the ]* N. I( E+ R* v" L
requirements of 6.4.7, then the materials and parts shall not ignite during single fault
; r! T; C |* Q+ Kconditions as specified in 6.4.3.2:
0 U3 B4 C- G6 a# H' v" C! x8 o, {– supplies, consumable materials, media and recording materials; and( L- Y. M5 K- f* B: n
– parts that are required to have particular properties in order to perform intended functions,; U0 Q0 i/ v- x3 G/ B
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics5 Z( M# e2 U7 v6 V6 I+ B
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# S. b: g' j- O$ E
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– by providing a fire enclosure as specified in 6.4.8.8 k* \! g% k, ^/ W+ s) J! r
Within the fire enclosure, combustible materials that do not comply with the flammability
% A: @* \) x9 qrequirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or( K5 J) R* W! c* G% v
be made of V-2 class material, VTM-2 class material or HF-2 class foamed material.2 [9 }! `$ G( e9 M8 q7 C# S6 N
These requirements do not apply to:
6 c& U1 O% @5 F8 N9 P: _– parts with a volume of less than 1 750 mm3;6 z; Z) T; A" l
– parts with a mass of combustible material of less than 4 g;
* [) j, F6 r2 x3 H– supplies, consumable materials, media and recording materials;" w' V! w" C4 A/ W% }
– parts that are required to have particular properties in order to perform intended functions," U3 T% l- d% `3 t3 f$ J
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics;
/ L% u g* A4 j" D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。& C3 B) o0 K* z" Q5 i3 U
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