SIST EN 300 119-4 V2.1.1:2006

• Abstract:

  The present document details requirements for subracks for use in miscellaneous racks/cabinets, as described in EN 300 119-3 [4]. The subrack will normally be supplied as a fully assembled structure, unequipped, partially equipped or fully equipped with plug-in units, etc.

• Status: Published
• Publication Date: 31-Jan-2006
• ICS: 19.040 - Environmental testing
• ICS: 33.050.01 - Telecommunication terminal equipment in general
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Feb-2006
• Due Date: 01-Feb-2006
• Completion Date: 01-Feb-2006
• Ref Project: ETSI EN 300 119-4 V2.1.1 (2004-09) - Environmental Engineering (EE); European telecommunication standard for equipment practice; Part 4: Engineering requirements for subracks in miscellaneous racks and cabinets

SIST EN 300 119-4 V2.1.1:2006 is the Slovenian version of ETSI EN 300 119-4 V2.1.1 from the European Telecommunications Standards Institute. It specifies engineering requirements for subracks used in miscellaneous racks and cabinets for telecommunications equipment in public telecommunications networks. It is aimed at designers, suppliers, operators and buyers who need mechanical fit, handling limits and EMC-related guidance for these subracks.

What does SIST EN 300 119-4 V2.1.1:2006 specify?

SIST EN 300 119-4 V2.1.1:2006 covers subracks for use in miscellaneous racks/cabinets as described in EN 300 119-3. The subrack may be supplied as a fully assembled structure, unequipped, partially equipped or fully equipped with plug-in units.

The document is organized into six clauses plus two informative annexes:

Part	Covers
Annex A	Illustrative figures
Annex B	Bibliography

The main body sets the scope, references, dimensions, accessibility, weight and EMC-related requirements. For a reader, that means the document is mainly about whether a subrack will fit, be handled safely and integrate into the rack/cabinet environment it is intended for.

What are the key requirements of SIST EN 300 119-4 V2.1.1:2006?

SIST EN 300 119-4 V2.1.1:2006 focuses on mechanical interface dimensions, access, weight and EMC considerations. In practice, it tells you how to design and specify a subrack so that it can be installed in the intended miscellaneous rack or cabinet.

Dimensions and interfaces

Clause 3 says the equipped subrack dimensions - height, width and the two depths - shall include all plug-in units, switches, lamps, cooling fans, connectors and similar items. That matters because the outside size has to reflect the complete installed assembly, not just the bare frame.

Table 1 gives the coordination dimensions for subracks mounted in miscellaneous racks/cabinets, including the mounting pitch and mounting positions. It also identifies where actual dimensions and coordination dimensions are used, and the note points to IEC 60917-2-2 for tolerances on W3 and S. In practice, this is the part you use when checking mechanical compatibility.

Accessibility

Clause 4 says subracks intended for a 300 mm deep miscellaneous rack/cabinet shall require access only from the front. That allows installation in locations where the rear is against a wall or where two cabinets are placed back to back.

Weight

Clause 5 sets a maximum weight of 18 kg for an unequipped subrack for safe handling. If a heavier subrack is needed, the supplier and user agree it separately. Clause 5 also says the supplier shall provide the total weight of an equipped subrack on demand so that overall rack weight and floor loading can be calculated.

EMC-related requirements

Clause 6 says subracks installed in miscellaneous racks/cabinets must take account of Council Directive 89/336/EEC on electromagnetic compatibility. It also points users toward the relevant existing and emerging EMC standards. In practice, this means the subrack design should not be treated as purely mechanical; EMC needs to be considered alongside layout and installation.

What terms does SIST EN 300 119-4 V2.1.1:2006 define?

• Subrack - The structural unit covered by the standard, normally supplied assembled and ready to accept equipment.
• Miscellaneous racks/cabinets - The rack and cabinet type covered by EN 300 119-3 and used as the installation environment for these subracks.
• Equipped subrack - A subrack fitted with plug-in units and related items such as switches, lamps, cooling fans and connectors.
• Unequipped subrack - A subrack without installed equipment, used in the document for handling and weight limits.
• Coordination dimension - A reference dimension used to coordinate mechanical interfaces; it is not a manufacturing dimension with a tolerance.
• Aperture dimension - A coordination dimension for usable space between features, where the actual inside dimension can only increase.

Who uses SIST EN 300 119-4 V2.1.1:2006?

SIST EN 300 119-4 V2.1.1:2006 is used by telecommunications equipment designers, rack and cabinet suppliers, system integrators, operators and purchasing teams. They use it when specifying subracks, checking mechanical compatibility, planning installation access, agreeing special handling for heavier units and calculating rack or floor loading in telecommunications centres and customer sites.

What changed in SIST EN 300 119-4 V2.1.1:2006 from the previous edition?

The document history records earlier versions of the same part: ETS 300 119-4 Edition 1 from January 1994 and V2.1.0 from May 2004. The present publication is V2.1.1, issued in September 2004.

Which standards are used with SIST EN 300 119-4 V2.1.1:2006?

• Council Directive 89/336/EEC - Provides the electromagnetic compatibility framework that clause 6 refers to.
• ETSI EN 300 119-1 - Gives the general introduction and terminology for the multi-part series.
• ETSI EN 300 119-2 - Covers engineering requirements for racks and cabinets.
• ETSI EN 300 119-3 - Covers engineering requirements for miscellaneous racks and cabinets, which is the installation context used here.
• ETSI EN 300 119-5 - Covers thermal management solutions for subracks, racks/cabinets and miscellaneous racks/cabinets.
• IEC publication 60917-2-2 - Provides interface co-ordination dimensions and tolerances for the 25 mm equipment practice.

What does the SIST EN 300 119-4 V2.1.1:2006 document contain?

The document contains a dimensioning clause with Table 1, which sets out the coordination dimensions for subracks and distinguishes between actual and coordination dimensions. It also contains a front-access rule for shallow cabinets and weight requirements for unequipped and equipped subracks. Annex A provides illustrative figures A.1 and A.2, which help readers understand the geometry of the subrack and its mounting relationships.

Annex B is a bibliography, and the notes under Table 1 explain how to interpret the dimensions and tolerances. Together, these parts support design review, mechanical integration and installation planning.

SLOVENSKI STANDARD
01-februar-2006
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Environmental Engineering (EE); European telecommunication standard for equipment
practice; Part 4: Engineering requirements for subracks in miscellaneous racks and
cabinets
Ta slovenski standard je istoveten z: EN 300 119-4 Version 2.1.1
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
33.050.01 Telekomunikacijska Telecommunication terminal
terminalska oprema na equipment in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)

Environmental Engineering (EE);
European telecommunication standard
for equipment practice;
Part 4: Engineering requirements for
subracks in miscellaneous racks and cabinets

2 ETSI EN 300 119-4 V2.1.1 (2004-09)

Reference
REN/EE-TMG006
Keywords
equipment practice, environment, rack
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3 ETSI EN 300 119-4 V2.1.1 (2004-09)
Contents
Intellectual Property Rights.4
Foreword.4
1 Scope.5
2 References.5
3 Dimensions for subracks .5
4 Accessibility.6
5 Weight.6
5.1 Unequipped subrack.6
5.2 Equipped subrack.6
6 Electromagnetic compatibility and electrostatic discharge requirements .6
Annex A (informative): Illustrative figures.8
Annex B (informative): Bibliography.10
History .11

ETSI
4 ETSI EN 300 119-4 V2.1.1 (2004-09)
Intellectual Property Rights
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pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
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Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Environmental
Engineering (EE).
The present document is part 4 of a multi-part deliverable aimed at setting out, on a common basis, the engineering
requirements for telecommunication practice, for housing equipment forming part of a public telecommunications
network. EN 300 119-1 [2] is a general introduction and explains the terminology used. EN 300 119-2 [3] specifies the
engineering requirements for racks and cabinets and EN 300 119-3 [4] specifies the engineering requirements for
miscellaneous racks and cabinets. EN 300 119-5 [5] covers the preferred thermal management solutions for subracks,
racks/cabinets and miscellaneous racks/cabinets installed indoors in restricted access locations, for the removal of he
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