Fiber Optic Multi-Channel Connectors
ITT Cannon's EOMC Series Fiber Optic connectors
are designed to meet the needs of military and
commercial customers who require a rugged envi-
ronmental multifiber field connector. The FOMC
combines features which provide the user with a
connector that will withstand rough handling and
weather extremes with features of elastomeric
cable and interface sealing, scoop proof interface
to prevent optical contact damage, removable front
insert for easy optical contact cleaning, anodized
shell finish, and a tough, strong dust cap with
attaching stainless steel strap.
Hermaphroditic design means plugs will mate with
an identical plug as well as receptacles. The remov-
able insert assures correcting mating and alignment. In
the FOMC, ruggedness is combined with good
optical perfomance, rapid coupling and attractive
pricing. Another plus feature for ITT Cannon's
FOMC design is the fiber flexure chamber which
prevents tensile loads from being applied to the
terminated fiber. The chamber provides space for
surplus fiber in a service loop of sufficient lenght to
permit one retemination of one or more fibers in
the plug and cable receptacle without reterminating
the strength member at the same time. This versa-
tility is an ITT Cannon exclusive.
The FOMC 2, 4, and 8 channel connector are
available as a cable plug, and several receptacle
shell configurations. The 8 channel can also be used
with less contacts i.e. 6,4, or 2 channels. Sealing
plugs are supplied with the 8 channel connector
when using less than the full complement of con-
tacts. This catalog provides complete ordering in-
formation on available shell types, contact layouts,
fiber and cable dimensional and mechanical param-
eters.
FOMC
State-of-the-art ceramic alignment tips on the contact provide maximum coupling performance - less than
1.0 dB average coupling less.
Standard Data
Description
Shell Hardware
Cable Clamp
Insert, Front Removable
Interfacial Seal
Cable Seal
O Rings
Alignment Guide
Strain Relief Spring
Fungus inert per requirement 4 of MIL-STD-454 Fluid resistant (elasto-
meric materials) per
MIL-H-5606-Hydraulic fluid, petroleum base
MIL-L7808-Lubricating oil, synthetic base
MIL-G-3056-Gasoline
MIL-A-8243-Ethelyne gylcol
Materials
Aluminum Alloy
Aluminum Alloy
Thermoplastic
Elastomer
Elastomer
Elastomer
Thermoplastic
Stell wire with black chrome finish
Thermoplastic
Thermoplastic
Elastomer
Laser with clear chromate over exposed base metal
Mandrel/Yoke
Receptacle Yoke
Dust Cap
Marking
Contact Arrangements
Face Veiw of Insert
2 and 4 Channel
8 Channel
F2
F1
F1
F1
F2
F3
F4
M1
M1
M1
M2
M2
M3
M4
Dimensions are shown in inches (millimeters).
Dimensions subject to change.
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299
Fiber Optic Multi-Channel Connectors
How to Order
FOMC
6-
2
W
FOMC
2
C
*
***
SERIES
Fiber Optic Multi-Channel
SHELL STYLE
2 - Square Flange Receptcale
(2/4) channel only)
6 - Cable Plug
7 - Jam Nut Receptacle
SHELL SIZE (Channels)
(Maximum number of contact positions)
2
4
8
DUST CAP
W - Connector supplied with dust cap
X - Without dust cap
CABLE TYPE
1 - Pigtail buffered fiber (receptacle only)
2 - Multi fiber strengthened cable
3 - Singel fiber strengthned cables (8 channel
only)
SERIES
SHELL STYLE
SHELL SIZE
DUST CAP
CABLE TYPE
CABLE SIZE (O.D)
POLARIZATION POSITION
MODIFICATION CODES
CABLE SIZE (O.D)
A - .190 +
_.015 (4.83 +
_.38)
D - .236 +
_.019 (6.0 +
_.5)
F - .276 +
_.015 (7.0 +
_.4)
G - .374 +
_.015 (9.50 +
_.38)*
H - .500 +
_.015 (12.70 +
_.38)*
P - Pigtail buffered fiber
*NOTE: Cable size G and H are for 8 channel FOMC Connector
only
POLARIZATION
(8 channel plug only. Omit for 2/4 channel)
0 - Not polarized
1 thru 6 - key position
MODIFICATION CODES
Consult factory
2 and 4 Channel
Square Flange
Receptacle
FOMC 2
1.395
(35.43)
1.480
(37.60)
1.064 (BSC
.(27.03)
3.700 (93.98)
.130
(3.30)
Millimeters are in parenthesis
2.40
(60.96)
1.064 (BSC
(27.03)
1.480 (37.60)
.128
(3.25) Dia.
4 Holes
Ø .013
.150 (3.81) Max. Panel
Plug
FOMC 6
3.700 (93.98)
Shell
2.40
(60.96)
End Nut
1.175 Dia.
(29.845)
Cable Strain
Relief
Front Removable insert
Connector Identification
And Mating Instructions
Jam Nut Receptacle
FOMC 7
1.395
(35.43)
.764
(19.41)
.130
(3.30)
1.395
(35.43)
3.700
(93.98)
.130
(3.30)
2.40
(60.96)
1.505 Dia
(38.23)
.945 Dia.
(24.00)
Shell
1.150
(29.21)
Yoke Tabs
1
(3 .44
6. 0
58
)
Jam Nut
Front Removable Insert
Rear Removable Yoke
(Optical Contact Retainer)
.150 (3.81) Max. Panel
.150 (3.81) Max. Panel
Dimensions are shown in inches (millimeters).
Dimensions subject to change.
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300
Fiber Optic Multi-Channel Connectors
8 Channel
Square Flange Receptacle
FOMC
FOMC 2
2.50 BSC (63.5)
2.0 BSC (50.8)
2.02 (51.2)
3.96 (100.5)
.193 (4.9)
2.64 (67.1)
2.500 (63.5)
.255 DIA. (6.35)
4 HOLES
Ø.015
1.98 DIA. (50.4)
1.76 DIA. (44.7)
2.00 (50.8)
Plug
FOMC 6
5.98 (151.8)
5.28 (134.0)
2.64
(67.1)
2.03 DIA.
(51.6)
1.76 DIA.
(44.7)
Jam Nut Receptacle
FOMC 7
2.02
(51.2)
1.32
(33.5)
5.24 (133.0)
.800 (20.3)
.193
(4.9)
3.22
(81.8)
.193 (4.9)
2.02
(51.2)
O-Ring
2.500 DIA.
(63.5)
1.700 Dia.
(43.2)
1.76 Dia.
(44.7)
Recommended Panel Cutouts
2 and 4 Channel
FOMC 2
FOMC 7
FOMC 2
8 Channel
FOMC 7
.
IA
D
2
)
36 .0
2. (60
M48 x 1.5-6g thd.
.200 (5.1) Max. Panel
Removable Front Insert
M48 x 1.5-6g Thd.
Jarn Nut
.200 (5.1) Max. Panel
Polarizing
Flanges
3.96 (100.5)
2.02
(51.2)
.193 (4.9)
2.64 (67.1)
2.500 DIA.
(63.5)
.
IA
D
2
)
36 .0
2. (60
1.76 Dia.
(44.7)
M48 x 1.5-6g Thd.
.200 (5.1) Max. Panel
1.064
BSC
(27.03)
1.073 +.010
-.000
(27.25 + 0.25)
-0.00)
DIA
1.064 BSC
(27.03)
1.016 + .000
-.005
(25.80 + 0.00
-0.13)
Ø2.000
-.000
2.000 (50.8)
(50.8
+.038
-.0.0)
+.015
Ø.253 + .002
_
Ø.005
CSK B2˚ x .507+/- .010
1.821 + .005
-.000
(48.25 + 0.13)
-0.00)
Ø.005
.126 + .002 DIA.
_
CSK 82˚ x .230 + .005
_
1.073 + .010 Dia. (27.25 + 0.25)
-.000
-.000)
2.000 BSC (50.8)
1.890 Dia. (48.00 + 0.25)
+.010
-.000)
-.000
Dimensions are shown in inches (millimeters).
Dimensions subject to change.
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301
Fiber Optic Multi-Channel Connectors
Contact Assembly
FOMC
TIP,
TERMINUS
FERRULE,
OPTICAL
"O" RING,
FRONT
SPRING
BODY. REAR
FERRULE
"O" RING
REAR
TUBE,
SUPPORT
∆
TIP I.D.
.175 (4.44)
MAX. DIA.
1.300 (33.02) MAX.
.170 (4.32)
MAX. DIA.
.230
(5.84)
MAX.
DIA.
FIBER BUFFER DIA
How to Order - Contacts
FOMC
-
T
-
10
- 1270
ITT CANNON SERIES
TERMINUS ASSEMBLY
BUFFER DIAMETER
TIP
SERIES
FOMC - Fiber Optic Multi-Channel
TERMINUS ASSEMBLY
BUFFER DIAMETER (in millimeters)
05 - 0.5 mm Buffer
10 - 1.0 mm Buffer
11 - 1.1 mm Buffer
TIP (I.D. in tenths of microns)
1270 - 127.0
µm
min.
1300 - 130.0
µm
min.
1440 - 144.0
µm
min.
Coupling Performance
900
800
700
600
FREQUENCY
500
400
300
200
100
0
0
0.5
1
1.5
2
2.5
CONNECTOR LOSS (dB)
Dimensions are shown in inches (millimeters).
Dimensions subject to change.
TOTAL SAMPLES = 3056
MEAN = 0.93
SID. DEV. = 0.32
MINIMUM = 0
MAXIMUM = 2.2
50/125 FIBER
CERAMIC ALIGNMENT TIP CONTACTS
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