关于62368 PS2和PS3的问题请教一下，各位大佬！
If the following materials and parts are not separated from a PIS according to therequirements of 6.4.7, then the materials and parts shall not ignite during single fault
conditions as specified in 6.4.3.2:
– supplies, consumable materials, media and recording materials; and
– parts that are required to have particular properties in order to perform intended functions,
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics
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
– by providing a fire enclosure as specified in 6.4.8.
Within the fire enclosure, combustible materials that do not comply with the flammability
requirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or
be made of V-2 class material, VTM-2 class material or HF-2 class foamed material.
These requirements do not apply to:
– parts with a volume of less than 1 750 mm3;
– parts with a mass of combustible material of less than 4 g;
– supplies, consumable materials, media and recording materials;
– parts that are required to have particular properties in order to perform intended functions,
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics;
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。
已经使用防火外壳了个人认为不用进行隔离了 大神 发表于 2021-12-1 09:19
已经使用防火外壳了个人认为不用进行隔离了
如果外壳是用V-1的材料，内部可燃性材料（PIS）防火等级低于V-2级材料、VTM-2级材料，那么这个时候补给材料，介质或消耗材料不需要与PIS隔离？ 标准条款都已经很明确说了按6.4.8章节规定提供防火外壳，那这里面已经考量了PIS和外壳的距离。如果距离不满足要求那就要选用V-0的外壳或者满足附录S.2的测试。所以不会存在外壳用V-1但是又不隔离的情况 防火V-0外壳了可以不用隔离 感覺樓主是不是混為一談了~~? 還是我沒看懂?
理論上應該是要看 cl 6.4.1 的章節
看你是要選 reduce the likeihood of ignition 還是選 control fire spread
reduce the likeihood of ignition 是隔離
control fire spread 是材質
不同的方法, 內文都有引導你要看那些章節
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