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If the following materials and parts are not separated from a PIS according to the8 |$ d( Y: Q, u. G% d; _
requirements of 6.4.7, then the materials and parts shall not ignite during single fault
" p$ i$ I) [, q4 S) Xconditions as specified in 6.4.3.2:- `8 t% V- Y3 Q/ P5 ? q; i. K
– supplies, consumable materials, media and recording materials; and) T3 E8 p* d7 j+ a( ^
– parts that are required to have particular properties in order to perform intended functions,4 C/ @, i/ P! R1 G4 ?& b5 [% S
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics
; D* s; g" L2 fPS2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) ` l' |3 C4 q$ J% C' @# A
4 b# X6 w2 Y& F# I0 X% ^– by providing a fire enclosure as specified in 6.4.8.- }4 g1 J& o, y3 B# U
Within the fire enclosure, combustible materials that do not comply with the flammability
; v2 Z, j5 o1 X, o5 srequirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or
( Q! y% |8 ^ A( D- Ebe made of V-2 class material, VTM-2 class material or HF-2 class foamed material.
7 u8 X( N8 Q7 g" HThese requirements do not apply to:$ p% Q% }% _; a* f. O; G
– parts with a volume of less than 1 750 mm3;
6 E- H5 g# H1 Z8 n6 e& [5 n– parts with a mass of combustible material of less than 4 g;
3 _ J' o& e% v1 S$ L– supplies, consumable materials, media and recording materials; o1 |* r0 {/ }+ T
– parts that are required to have particular properties in order to perform intended functions,8 r7 }% Q# j; Y
such as synthetic rubber rollers, ink tubes and material requiring optical characteristics;
2 h$ V# F1 g- i0 r1 p8 H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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发表于 2021-11-29 14:24
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