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If the following materials and parts are not separated from a PIS according to the
1 f# Y0 `! P* q& V& d6 S& o( i, k1 Urequirements of 6.4.7, then the materials and parts shall not ignite during single fault+ b, N% G0 b: z9 d, j3 U5 d
conditions as specified in 6.4.3.2:% N% V5 b. S2 S
– supplies, consumable materials, media and recording materials; and; j& x" K. E- r. W/ Z
– parts that are required to have particular properties in order to perform intended functions,
* V. K( a. O; d2 r4 R6 P( Dsuch as synthetic rubber rollers, ink tubes and material requiring optical characteristics7 X N! S! `% X! G
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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' e7 s% a" t; T. y T– by providing a fire enclosure as specified in 6.4.8.# F% h# `* \( }) ]- O) u5 i( V: d# w
Within the fire enclosure, combustible materials that do not comply with the flammability
& P0 F3 [) Q. E% wrequirements for PS2 or PS3 circuits shall comply with the flammability test of Clause S.1 or/ V6 n3 I. z" R2 M$ Y' a
be made of V-2 class material, VTM-2 class material or HF-2 class foamed material.( k8 `2 T3 l, V4 \/ t6 e! C
These requirements do not apply to:
# n- Z- a" E8 ^9 N8 K9 E– parts with a volume of less than 1 750 mm3;$ u1 d& N. A* V, w8 k' f8 U5 O9 ?
– parts with a mass of combustible material of less than 4 g;; }. P x& g" P a7 J+ v
– supplies, consumable materials, media and recording materials;- P; Z0 |, k- H/ g8 R d) s5 ~7 |
– parts that are required to have particular properties in order to perform intended functions,
3 i( s7 L3 b) u. W+ [such as synthetic rubber rollers, ink tubes and material requiring optical characteristics;
" q! s+ V7 \3 [2 y& x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。1 G2 o0 L* D7 K! g# a1 {, O1 Y
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