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如果适配器是隔离型的,而且输出满足LPS
+ R5 R) \+ H; |" u3 h5 ^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:
2 X( R5 e" s. `$ l5 V7 Y- {3 T( n2 L# E1 V" M
The following do not require a FIRE ENCLOSURE:
" G9 r* o" a4 H- a8 l...+ p! i, S- _# F9 s0 R
- other components in SECONDARY CIRCUITS:
5 e J5 w/ C2 Y! F9 G3 |• supplied by limited power sources complying with 2.5 and mounted on V-17 Z. H9 M6 p& r5 v% X
CLASS MATERIAL;
) ? W4 n# ^, H% n3 a: x( k5 }....
1 [( w2 t" ]8 S; z# ?- ?, k! G. a! Q2 w6 _& O
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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