DSH 290 Miss-mating of connectors

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DSH 290

Miss-mating of connectors

4.3.17

60950(ed.2) 0 c. u) d9 Y; e

% S- ]$ _! o) B* _6 V7 CStandard: IEC 60950 Ed. 2 Clause: 4.3.17 Sheet n. 290
4 {$ V0 ]/ ~6 \* p" Y8 iPage 1(1)
Subject: Miss-mating of connectors Key words:
- Modular
connector
- Miss-mating
& H' ]- R: j$ o4 b' n" NDecision n. 23/36
taken at 36th
$ A6 D5 d1 C% e- dmeeting/1999
% O) D4 g5 H: T: v9 L2 JQuestion:
, |$ p1 D$ q2 T& M6 A6 C5 S. bIt is very common to use modular connectors (e.g. RJ-11, RJ-12, RJ-45), accessible to the
users, for a variety of transmission functions, both telecommunication and data.
Unfortunately, RJ-11 modular connectors easily mate with other configurations of modular
connectors: RJ-12, RJ-45. This sub-clause permits marking only for connectors accessible
3 F5 M9 L* E( a7 G5 kto Service Personnel and, on the other hand, relying on configuration as a means of
preventing miss-mating is unrealistic.
: g1 t, b  Q+ @* [1 T& Q) _How shall these connectors be tested?.
  @9 w8 V  Y! }4 t' QDecision:
If there is a possibility of miss-mating of modular connectors (e.g. RJ-11, RJ-12 etc.)
accessible for the user, tests have to be made to verify that the SELV limits remain.
If the voltage of the TNV-circuit is known this value is used, otherwise the test generator of
! G9 E# R& B) b  A+ P/ [( J6.2.1.3 (Figure 15A) is used for testing. (See also OSM-EE Decision 98/6)