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如果适配器是隔离型的,而且输出满足LPS
4 d6 M& g6 [( @* x6 z" d产品的PCB在V-1级或者以上,外壳材料可以是HB等级的,依据IEC/UL 60950-1 4.7.2.2:
; h: _7 w% p# }+ {& x6 a( \' Q% O9 ]: a# _6 q- v8 F9 Q6 u
The following do not require a FIRE ENCLOSURE:
! P1 @. r4 {- w* T: H# t% T* R...% w2 _9 f2 p2 V! A: Y' F% w
- other components in SECONDARY CIRCUITS:! Q7 c8 \/ j3 x* q" Q) g$ e
• supplied by limited power sources complying with 2.5 and mounted on V-1
. w! A, O, F5 {0 HCLASS MATERIAL;* e$ S7 x5 f7 C! b) Q
....4 Z- c5 M" ` H. Y
* l( s5 W; x. P+ `
如果不满足要求,外壳的防火等级就要看Table 4E - Summary of material flammability requirements 的要求了 |
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