IEC TS 62661-2-1:2013

IEC/TS 62661-2-1 ®
Edition 1.0 2013-08
TECHNICAL
SPECIFICATION
colour
inside
Optical backplanes – Product specification –
Part 2-1: Optical backplane using optical fibre circuit boards and multi-core right
angle optical connectors
IEC/TS 62661-2-1:2013(E)
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IEC/TS 62661-2-1 ®
Edition 1.0 2013-08
TECHNICAL
SPECIFICATION
colour
inside
Optical backplanes – Product specification –

Part 2-1: Optical backplane using optical fibre circuit boards and multi-core right

angle optical connectors
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
W
ICS 33.180.99 ISBN 978-2-8322-1039-0

– 2 – TS 62661-2-1 © IEC:2013(E)
CONTENTS
FOREWORD . 4
1 Scope . 6
1.1 General . 6
1.2 Product definition . 6
1.3 Connection arrangement . 6
1.4 Classification of connections . 6
1.5 Operating environment . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Dimensional requirements . 9
4.1 Dimension of a sub-rack . 9
4.2 Dimension of optical wiring on optical backplane . 9
4.3 Interconnection condition of connectors on optical backplane . 11
4.4 Mounting position of connectors on optical backplane . 11
4.5 Mounting position of connectors on daughter board . 11
5 Requirements for dual-star optical circuits connection . 12
5.1 Assignment of the name of an optical connection point . 12
5.2 Specification of optical cable connection . 13
6 Tests . 20
6.1 Sample size . 20
6.2 Test and measurement methods . 20
6.3 Test sequence . 20
6.4 Pass/fail criteria . 20
7 Test report . 20
8 Product qualification requirements . 20
8.1 Optical performance requirements . 20
8.1.1 Test 1: Attenuation, IEC 61300-3-4, Method C . 20
8.1.2 Test 2: Return loss, IEC 61300-3-6, Method: branching
devices . 21
8.1.3 Test 3: Optical propagation delay (fibre length), IEC 60793-1-
22, Method B . 22
8.2 Mechanical performance requirements . 22
8.2.1 Test 4: Mating durability, IEC 61300-2-2 . 22
8.2.2 Test 5: Vibration, IEC 61300-2-1 . 22
8.2.3 Test 6: Shock, IEC 61300-2-9 . 23
8.3 Environmental performance requirements . 23
8.3.1 Test 7: Cold, IEC 61300-2-17 . 23
8.3.2 Test 8: Dry heat, IEC 61300-2-18 . 24
9 Reliability . 24
9.1 General . 24
9.2 Test 9: High temperature endurance, IEC 61300-2-18 . 24
9.3 Test 10: Damp heat, IEC 61300-2-19 . 24
9.4 Test 11: Change of temperature, IEC 61300-2-22 . 24
Annex A (normative) Mounting an optical backplane to zone 3 of the advanced
telecommunication computing architecture (ATCA) backplane . 26

TS 62661-2-1 © IEC:2013(E) – 3 –
A.1 General . 26
A.2 Dimensional condition . 26
A.2.1 Mounting position of an optical backplane . 26
A.2.2 Dimensional condition of the daughter board . 28
Annex B (normative) Specification for compact right-angled optical board (CRO)
connector . 29
B.1 General . 29
B.2 Description . 29
B.3 Interfaces . 29
Bibliography . 38

Figure 1 – Sub-rack for optical back plane . 9
Figure 2 – Area for optical wiring and positions of optical connectors on optical
backplane . 11
Figure 3 – 8 degree angle polish of ferrule . 11
Figure 4 – Hole positions of low loss RAO connectors on optical backplane . 12
Figure 5 – Hole positions to mount a RAO connector to a daughter board . 12
Figure 6 – Assignment of connection points . 13
Figure A.1 – Mounting position of optical backplane . 27
Figure A.2 – Structure of optical daughter board . 28
Figure B.1 – CRO connector configuration . 30
Figure B.2 – CRO socket connector interface. 31
Figure B.3 – CRO plug connector interface (1 of 2) . 32
Figure B.4 – Optical datum target location diagrams for 0,250 mm pitch fibre arrayed. 34
Figure B.5 – Optical datum target location diagrams for 0,125 mm pitch fibre arrayed. 35

Table 1 – Classification of ferrules . 7
Table 2 – DS192 Optical backplane . 14
Table 3 – DS384 Optical wiring backplane . 16
Table B.1 – Dimensions of the CRO socket connector interface . 36
Table B.2 – Dimensions of the CRO plug connector interface . 37

– 4 – TS 62661-2-1 © IEC:2013(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL BACKPLANES – PRODUCT SPECIFICATION –

Part 2-1: Optical backplane using optical fibre circuit boards
and multi-core right angle optical connectors

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