EN 61754-12:1999

SLOVENSKI STANDARD
01-februar-2001
Fibre optic interfaces - Part 12: Type FS connector family (IEC 61754-12:1999)
Fibre optic connector interfaces -- Part 12: Type FS connector family
Steckgesichter von Lichtwellenleiter-Steckverbindern -- Teil 12: Bauart FS
Steckverbinderfamilie
Interfaces de connecteurs pour fibres optiques -- Partie 12: Famille de connecteurs du
type FS
Ta slovenski standard je istoveten z: EN 61754-12:1999
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
61754-12
INTERNATIONAL
Première édition
STANDARD
First edition
1999-08
Interfaces de connecteurs pour fibres optiques –
Partie 12:
Famille de connecteurs de type FS
Fibre optic connector interfaces –
Part 12:
Type FS connector family
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61754-12 © IEC:1999 – 3 –
CONTENTS
Page
FOREWORD . 5
Clause
1 Scope . 7
2 Description . 7
3 Interfaces . 7
4 Intermateable connectors. 9
Figures and tables . 11

61754-12 © IEC:1999 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
FIBRE OPTIC CONNECTOR INTERFACES –
Part 12: Type FS connector family
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61754-12 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/1218/FDIS 86B/1253/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.

61754-12 © IEC:1999 – 7 –
FIBRE OPTIC CONNECTOR INTERFACES –
Part 12: Type FS connector family
1 Scope
This part of IEC 61754 defines the standard interface dimensions for the type FS connector
family.
2 Description
The parent connector for the type FS connector family is a duplex connector set of plug and
adaptor configuration. The plug has a pair of cylindrical spring loaded abutting ferrules of
2,5 mm nominal ferrule diameter. The optical alignment mechanism is a rigid bore or resilient
sleeve contained within the adaptor. It includes a hand-released latch coupling. The plug has
multiple keyway arrangements and the adaptor has multiple key configurations. The keying
scheme is exclusionary and is used to limit mating between plug and adaptor to specific key
combinations.
3 Interfaces
This document contains the following standard interfaces:
Interface 12-1: plug connector interface A
Interface 12-2: adaptor connector interface A
Interface 12-3: plug connector interface B
Interface 12-4: adaptor connector interface B
Interface 12-5: plug connector interface M
Interface 12-6: adaptor connector interface M
Interface 12-7: plug connector interface S
Interface 12-8: adaptor connector interface S
Interface 12-9: plug connector interface SA
Interface 12-10: adaptor connector interface SA
Interface 12-11: plug connector interface SB
Interface 12-12: adaptor connector interface SB
Interface 12-13: plug connector interface SM
Interface 12-14: adaptor connector interface SM
Interface 12-15: plug connector interface SS
Interface 12-16: adaptor connector interface SS

61754-12 © IEC:1999 – 9 –
4 Intermateable connectors
The following standards are intermateable; X denotes intermateable connectors.
Table 1a – Multimode key arrangements
Adaptor
Key A B M S
Key Variant 61754-12-2 61754-12-4 61754-12-6 61754-12-8
A 61754-12-1 X –– –
Plug B 61754-12-3 – X ––
M 61754-12-5 –– X –
S 61754-12-7 X X X X
Table 1b – Single-mode key arrangements
Adaptor
Key SA SB SM SS
Key Variant 61754-12-10 61754-12-12 61754-12-14 61754-12-16
SA 61754-12-9 X –– –
Plug SB 61754-12-11 – X ––
SM 61754-12-13 –– X –
SS 61754-12-15 X X X X
61754-12 © IEC:1999                  – 11 –
IEC  943/99
Figure 1 – Plug connector interface – Key type A

61754-12 © IEC:1999 – 13 –
Table 2 – Dimensions of plug interface – Key type A
Reference Minimum Maximum Basic Notes
A 2,498 mm 2,5 mm
B 7,10 mm 7,52 mm
C 5,87 mm 6,15 mm
D 1,65 mm 2,20 mm Radius
E 17,78 mm
F 8,89 mm
G 1,9 mm 3,90 mm
H – 9,91 mm
I 1,80 mm 2,25 mm A key
J 7,57 mm 7,80 mm
K 9,00 mm 9,25 mm
L – 1,78 mm Radius
M 1,35 mm – A key
N13° 17° A key
O – 14,68 mm
P 34 mm 34,80 mm 2
Q 33,90 mm 35,31 mm
R 13,21 mm 24 mm 3
S 32 mm 32,23 mm
T 14,71 mm 15 mm
U 12,8 mm 12,93 mm
V 6,73 mm 7,3 mm
W 3,25 mm 4,16 mm
X 6,4 mm 8,7 mm
Y 33,53 mm 1
Z 23,29 mm 24,69 mm
AA 3,56 mm –
BB 2,5 mm 4,09 mm
CC 28,62 mm 29,39 mm
DD 2,5 mm 5,08 mm
EE 6,61 mm A key
NOTE 1 – The dimension is given in the free state. The ferrules shall be capable of moving to
reduce the dimension to 32,84 mm. The plug ferrule end shall adhere to the optical reference plane
with a static force of 6,7 N minimum to 13,3 N maximum per ferrule.
NOTE 2 – The dimension is given in the free state. Coupling latches shall be capable of moving to
reduce the dimension to 32,52 mm.
NOTE 3 – Start of keying feature.

61754-12 © IEC:1999                  – 15 –
IEC  944/99
Figure 2 – Adaptor connector interface – Key type A

61754-12 © IEC:1999 – 17 –
Table 3a – Dimensions of the adaptor interface – Key type A
Reference Minimum Maximum Basic Notes
A See tolerance grade table
B 32,26 mm 32,36 mm 2
C – 6,22 mm
D
29° 31°
E 17,78 mm
F 8,89 mm
G – 1,78 mm
H 10,03 mm 10,3 mm
I 9,3 mm 9,9 mm 3
J 4,57 mm 6,35 mm
K 9,27 mm 9,37 mm
L 5,1 mm 5,5 mm
M – 25,53 mm
N 1,17 mm 9,37 mm
O 2,54 mm 2,8 mm
P 32,52 mm 32,9 mm
Q 1,14 mm 1,4 mm
R 4,32 mm 4,8 mm
S 9,53 mm 9,91 mm
T – 4,04 mm
U – 5,84 mm
V 1,52 mm –
W 4,1 mm –
X 7,65 mm 8 mm
Y 32,85 mm 33,45 mm
Z 2,79 mm – Radius
AA 1,52 mm 1,78 mm A key
BB A key
13° 17°
CC 6,61 mm A key
JJ 1,14 mm 1,27 mm
NOTE 1 – Not specified.
NOTE 2 – Dimensions at optical reference plane.
NOTE 3 – The square corner feature is optional.

61754-12 © IEC:1999 – 19 –
Table 3b – Tolerance grade table – Dimensions
Grade Minimum Maximum Notes
mm mm
0 –– 1
1 2,501 2,503
2 2,501 2,506
3 2,501 2,510
4 2,501 2,515
NOTE 1 – The connector alignment feature is a resilient sleeve. The feature shall retain a gauge pin,
as shown, with a force of 2 N to 5,9 N when another gauge pin is inserted midway into the feature
from the opposite side to the optical reference plane.
IEC  945/99
Figure 3 – Gauge pin
Table 4 – Dimensions of the gauge pin
Reference Minimum Maximum Basic Notes
mm mm
CA 2,4985 2,4995 1
CB 7,75 –
CC – 5,4
NOTE 1 – Surface roughness grade N4 (0,2 µm Ra).

61754-12 © IEC:1999                  – 21 –
IEC  946/99
Figure 4 – Plug connector interface – Key type B

61754-12 © IEC:1999 – 23 –
Table 5 – Dimensions of the plug interface – Key type B
Reference Minimum Maximum Basic Notes
A 2,498 mm 2,5 mm
B 7,10 mm 7,52 mm
C 5,87 mm 6,15 mm
D 1,65 mm 2,20 mm Radius
E 17,78 mm
F 8,89 mm
G 1,9 mm 3,90 mm
H – 9,91 mm
I 1,80 mm 2,25 mm B key
J 7,57 mm 7,80 mm
K 9,00 mm 9,25 mm
L – 1,78 mm Radius
M 1,35 mm – B key
N 13° 17° B key
O – 14,68 mm
P 34 mm 34,80 mm 2
Q 33,90 mm 35,31 mm
R 13,21 mm 24 mm 3
S 32 mm 32,23 mm
T 14,71 mm 15 mm
U 12,8 mm 12,93 mm
V 6,73 mm 7,3 mm
W 3,25 mm 4,16 mm
X 6,4 mm 8,7 mm
Y 33,53 mm 1
Z 23,29 mm 24,69 mm
AA 3,56 mm –
BB 2,5 mm 4,09 mm
CC 28,62 mm 29,39 mm
DD 2,5 mm 5,08 mm
EE 11,17 mm B key
NOTE 1 – The dimension is given in the free state. The ferrules shall be capable of moving to
reduce the dimension to 32,84 mm. The plug ferrule end shall adhere to the optical reference plane
with a static force of 6,7 N minimum to 13,3 N maximum per ferrule.
NOTE 2 – The dimension is given in the free state. The coupling latches shall be capable of moving
to reduce the dimension to 32,52 mm.
NOTE 3 – Start of keying feature.

61754-12 © IEC:1999                  – 25 –
IEC  947/99
Figure 5 – Adaptor connector interface – Key type B

61754-12 © IEC:1999 – 27 –
Table 6a – Dimensions of the adaptor interface – Key type B
Reference Minimum Maximum Basic Notes
A See tolerance grade table
B 32,26 mm 32,36 mm 2
C – 6,22 mm
D29° 31°
E 17,78 mm
F 8,89 mm
G – 1,78 mm
H 10,03 mm 10,3 mm
I 9,3 mm 9,9 mm 3
J 4,57 mm 6,35 mm
K 9,27 mm 9,37 mm
L 5,1 mm 5,5 mm
M – 25,53 mm
N 1,17 mm 9,37 mm
O 2,54 mm 2,8 mm
P 32,52 mm 32,9 mm
Q 1,14 mm 1,4 mm
R 4,32 mm 4,8 mm
S 9,53 mm 9,91 mm
T – 4,04 mm
U – 5,84 mm
V 1,52 mm –
W 4,1 mm –
X 7,65 mm 8 mm
Y 32,85 mm 33,45 mm
Z 2,79 mm – Radius
AA 1,52 mm 1,78 mm B key
BB B key
13° 17°
CC 11,17 mm B key
JJ 1,14 mm 1,27 mm
NOTE 1 – Not specified.
NOTE 2 – Dimensions at optical reference plane.
NOTE 3 – The square corner feature is optional.

61754-12 © IEC:1999 – 29 –
Table 6b – Tolerance grade table – Dimensions
Grade Minimum Maximum Notes
mm mm
0 —— 1
1 2,501 2,503
2 2,501 2,506
3 2,501 2,510
4 2,501 2,515
NOTE 1 – The connector alignment feature is a resilient sleeve. The feature shall retain a gauge pin,
as shown, with a force of 2 N to 5,9 N when another gauge pin is inserted midway into the feature
from the opposite side to the optical reference plane.
IEC  948/99
Figure 6 – Gauge pin
Table 7 – Dimensions of the gauge pin
Reference Minimum Maximum Base Notes
mm mm
CA 2,4985 2,4995 1
CB 7,75 –
CC – 5,4
NOTE 1 – Surface roughness grade N4 (0,2 µm Ra).

61754-12 © IEC:1999                  – 31 –
IEC  949/99
Figure 7 – Plug connector interface – Key type M

61754-12 © IEC:1999 – 33 –
Table 8 – Dimensions of the plug interface – Key type M
Reference Minimum Maximum Basic Notes
A 2,498 mm 2,5 mm
B 7,10 mm 7,52 mm
C 5,87 mm 6,15 mm
D 1,65 mm 2,20 mm Radius
E 17,78 mm
F 8,89 mm
G 1,9 mm 3,90 mm
H – 9,91 mm
I 6,38 mm 6,86 mm M key
J 7,57 mm 7,80 mm
K 9,00 mm 9,25 mm
L – 1,78 mm Radius
M 1,35 mm – M key
N13° 17° M key
O – 14,68 mm
P 34 mm 34,80 mm 2
Q 33,90 mm 35,31 mm
R 13,21 mm 24 mm 3
S 32 mm 32,23 mm
T 14,71 mm 15 mm
U 12,8 mm 12,93 mm
V 6,73 mm 7,3 mm
W 3,25 mm 4,16 mm
X 6,4 mm 8,7 mm
Y 33,53 mm 1
Z 23,29 mm 24,69 mm
AA 3,56 mm –
BB 2,5 mm 4,09 mm
CC 28,62 mm 29,39 mm
DD 2,5 mm 5,08 mm
NOTE – The dimension is given in the free state. The ferrules shall be capable of moving to reduce
the dimension to 32,84 mm. The plug ferrule end shall adhere to the optical reference plane with a
static force of 6,7 N minimum to 13,3 N maximum per ferrule.
NOTE 2 – The dimension is given in the free state. The coupling latches shall be capable of moving
to reduce the dimension to 32,52 mm.
NOTE 3 – Start of keying feature.

61754-12 © IEC:1999                  – 35 –
Figure 8 – Adaptor connector interface – Key type M IEC  950/99

61754-12 © IEC:1999 – 37 –
Table 9a – Dimensions of the adaptor interface – Key type M
Reference Minimum Maximum Basic Notes
A See tolerance grade table
B 32,26 mm 32,36 mm 2
C – 6,22 mm
D29° 31°
E 17,78 mm
F 8,89 mm
G – 1,78 mm
H 10,03 mm 10,3 mm
I 9,3 mm 9,9 mm 3
J 4,57 mm 6,35 mm
K 9,27 mm 9,37 mm
L 5,1 mm 5,5 mm
M – 25,53 mm
N 1,17 mm 9,37 mm
O 2,54 mm 2,8 mm
P 32,52 mm 32,9 mm
Q 1,14 mm 1,4 mm
R 4,32 mm 4,8 mm
S 9,53 mm 9,91 mm
T – 4,04 mm
U – 5,84 mm
V 1,52 mm –
W 4,1 mm –
X 7,65 mm 8 mm
Y 32,85 mm 33,45 mm
Z 2,79 mm – Radius
AA 1,52 mm 1,78 mm M key
BB 13° 17° M key
CC 8,89 mm M key
JJ 1,14 mm 1,27 mm
NOTE 1 – Not specified.
NOTE 2 – Dimensions at optical reference plane.
NOTE 3 – The square corner feature is optional.

61754-12 © IEC:1999 – 39 –
Table 9b – Tolerance grade table – Dimensions
Grade Minimum Maximum Notes
mm mm
0 –– 1
1 2,501 2,503
2 2,501 2,506
3 2,501 2,510
4 2,501 2,515
NOTE 1 – The connector alignment feature is a resilient sleeve. The feature shall retain a gauge pin,
as shown, with a for
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