DSH 445 Protection of users

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DSH 445 8 O; c, e2 k( Q, ]" I4 U8 \

Protection of users $ s: h# g. F+ b1 d1 U3 A

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60950-1(ed.1)

! }1 t& |9 O& t8 Y) M6 yStandard:
5 F  z! J$ V+ l6 o8 R0 \5 YIEC 60950-1:2000, 1st ed,
Sub clause:
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' C" k4 r1 ?% e1 t% d7 A1 mSheet No.
) ~# R8 b; Z5 d5 l; l: W445
% r/ {! _% @0 }4 T5 ]" FSubject:
Protection of users
Key words:
Antenna, voltage surge test
Decision taken at the
- Y$ G, U% O* q40th meeting 2003
" s/ S$ G& e9 ^0 ?Question:
For protection of users and service persons from transients and voltage surges, what are the appropriate
9 e4 Y5 \( s; F. h5 A5 _' }; }requirements between the following points for ITE connected to an external antenna:
(a) antenna connection and Primary circuits?
  y$ f) S4 `3 r8 m, U$ D9 T(b) antenna connection and SELV circuits when the antenna cabling is coax?
(c) Antenna connection and SELV circuits when the antenna cabling is unshielded twisted pair
8 v5 l$ {6 U; h! \4 b) Y" G(UTP)?
See attached diagram.
' _1 m: }- X& k; j' ZDecision:
Since Clause 7 is in IEC 60950-1, but is not in IEC 60950 3rd Ed, all references are to IEC 60950-1
The circuit connected to the antenna is classified in accordance with Sub-Clause 7.1 and subjected to the
; z" f% t8 X4 Q3 w4 @1 m8 ~. }- lappropriate requirements per 7.1. Additionally,
(a) Sub-clause 7.3.1 is applied between the external antenna connection (terminal) and Primary
circuits.
) o  ]% p3 |) M(b) Sub-clause 7.2 is applied between the external antenna connection (terminal) and the SELV
connector (RJ -45) when the antenna cabling is coax.
(c) Sub-clause 7.2 is applied between the external antenna connection (terminal) and the SELV
6 [3 r3 @0 X6 T' V# z( T7 Gconnector (RJ -45) when the antenna cabling is UTP.
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