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|  DSH 290* o) Q: C$ T+ P9 T ^
1 }( l3 w5 g) P" w6 ~5 C2 m1 d9 E& w | Miss-mating of connectors) O7 ?4 m1 X3 S; x8 c
| 4.3.17
* ^" |' g3 g6 J | 60950(ed.2)
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- a: m# F# E- H/ O4 NStandard: IEC 60950 Ed. 2 Clause: 4.3.17 Sheet n. 290. l; m( A& ?! ]* y
Page 1(1)
9 T& J6 a: l. I6 g5 QSubject: Miss-mating of connectors Key words:
* o1 n4 g, d) W! j9 ?1 A2 k% v- Modular5 @) c/ e( d; @) r! b5 d! s
connector7 m+ c% Y# h: q
- Miss-mating) l$ e5 |/ ]6 C
Decision n. 23/36
) d3 B/ e6 r7 C/ q4 Itaken at 36th
H& c# V, Q1 d3 `, F- Fmeeting/1999% u, r8 P; W5 q0 u0 d9 D
Question:
- L4 o( n. R9 G( M) K' k# |It is very common to use modular connectors (e.g. RJ-11, RJ-12, RJ-45), accessible to the
2 f# f+ o+ e1 ?# e6 n; Y( G. b# Yusers, for a variety of transmission functions, both telecommunication and data.5 A: B. s6 w) G7 p: K$ U4 D
Unfortunately, RJ-11 modular connectors easily mate with other configurations of modular! g5 H/ O0 m& D
connectors: RJ-12, RJ-45. This sub-clause permits marking only for connectors accessible
+ X+ J4 P9 q# j5 Q! F( Gto Service Personnel and, on the other hand, relying on configuration as a means of
* | E9 @" {+ \: Z3 rpreventing miss-mating is unrealistic.4 }; Z6 U0 |# r% t. R
How shall these connectors be tested?.
5 ~& A, q0 J+ [- Q" y- ?Decision:) k$ I e$ V/ Y8 d/ v
If there is a possibility of miss-mating of modular connectors (e.g. RJ-11, RJ-12 etc.), O/ T/ o4 i4 L3 m- z
accessible for the user, tests have to be made to verify that the SELV limits remain./ e/ q& r% E. M2 d+ R( W: ?+ [3 B
If the voltage of the TNV-circuit is known this value is used, otherwise the test generator of
5 J5 K% V* ?% V1 N0 k3 U6.2.1.3 (Figure 15A) is used for testing. (See also OSM-EE Decision 98/6)% K# Z* Q8 Y2 k# }
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发表于 2012-11-6 17:54
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