ca_E1-E68:Layout 1 2/10/11 9:37 AM Page 1 ca_E1-E68:Layout 1 2/10/11 9:37 AM Page 26 Cannon Fiber Optics Design Guide FOMC Hermaphroditic design means plugs will mate with an identical plug as well as receptacles. The removable insert assures correcting mating and alignment. In the Cannon FOMC, ruggedness is combined with good optical performance, rapid coupling and attractive pricing. Another feature for the 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 length to permit one retermination of one or more fibers in the plug and cable receptacle without reterminating the strength member at the same time. This versatility is an ITT 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 contacts. This catalog provides complete ordering information on available shell types, contact layouts, fiber and cable dimensional and mechanical parameters. ITT’s FOMC series fiber optic connectors are designed to meet the needs of military and commercial customers who require a rugged environmental multi-fiber 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. Fiber Optics Standard Data Fungus inert per requirement 4 of MIL-STD-454 Fluid resistant (elastomeric materials) per MIL-H-5606-Hydraulic fluid, petroleum base MIL-L7808-Lubricating oil, synthetic base MIL-G-3056-Gasoline MIL-A-8243-Ethelyne gylcol Description Materials Shell Hardware Aluminum Alloy Cable Clamp Aluminum Alloy Insert, Front Removable Thermoplastic Interfacial Seal Elastomer Cable Seal Elastomer O Rings Elastomer Alignment Guide Thermoplastic Strain Relief Spring Stell wire with black chrome finish Mandrel/Yoke Thermoplastic Receptacle Yoke Thermoplastic Dust Cap Elastomer Marking Laser with clear chromate over exposed base metal Contact Arrangements Face View of Insert 2 and 4 Channel 8 Channel E F2 F1 M1 F1 F3 F1 F4 M1 M4 F2 M1 M2 M2 M3 Dimensions shown in inches (mm) Specifications and dimensions subject to change E-26 www.ittcannon.com ca_E1-E68:Layout 1 2/10/11 9:37 AM Page 27 Cannon Fiber Optics Design Guide Specification How to Comparison Order FOMC SERIES 6- 2 W 2 C * *** SERIES Fiber Optic Multi-Channel SHELL STYLE SHELL STYLE 2 - Square Flange Receptcale (2/4) channel only) 6 - Cable Plug 7 - Jam Nut Receptacle SHELL SIZE DUST CAP CABLE TYPE SHELL SIZE (Channels) CABLE SIZE (O.D) (Maximum number of contact positions) 2 4 8 POLARIZATION POSITION MODIFICATION CODES CABLE SIZE (O.D) 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) POLARIZATION 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 (8 channel plug only. Omit for 2/4 channel) 0 - Not polarized 1 thru 6 - key position MODIFICATION CODES Consult factory *NOTE: Cable size G and H are for 8 channel FOMC Connector only 2 and 4 Channel 2 and 4 Channel Square Flange Receptacle FOMC 2 3.700 (93.98) .130 (3.30) 1.395 (35.43) Millimeters are in parenthesis 1.480 (37.60) 2.40 (60.96) 1.064 (BSC .(27.03) 1.064 (BSC (27.03) 1.480 (37.60) .128 (3.25) Dia. 4 Holes Ø .013 .150 (3.81) Max. Panel Fiber Optics Plug FOMC 6 3.700 (93.98) 2.40 (60.96) Shell End Nut 1.175 Dia. (29.845) Cable Strain Relief Connector Identification And Mating Instructions Front Removable insert Jam Nut Receptacle .764 (19.41) FOMC 7 1.395 (35.43) 3.700 (93.98) .130 (3.30) 1.395 (35.43) .130 (3.30) E 2.40 (60.96) .945 Dia. (24.00) Shell 1.505 Dia (38.23) 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 shown in inches (mm) Specifications and dimensions subject to change www.ittcannon.com 1.150 (29.21) Yoke Tabs E-27 ca_E1-E68:Layout 1 2/10/11 9:37 AM Page 28 Cannon Fiber Optics Design Guide B Channel Square Flange Receptacle FOMC 2 3.96 (100.5) 2.50 BSC (63.5) 2.0 BSC (50.8) 2.02 (51.2) .193 (4.9) 2.64 (67.1) 2.500 (63.5) .255 DIA. (6.35) 4 HOLES Ø.015 2.00 (50.8) 1.98 DIA. (50.4) 1.76 DIA. (44.7) Plug FOMC 6 2.64 (67.1) 5.98 (151.8) 5.28 (134.0) 1.76 DIA. (44.7) 2.03 DIA. (51.6) Jam Nut Receptacle FOMC 7 5.24 (133.0) .800 (20.3) 2.02 (51.2) .193 (4.9) 2.02 (51.2) 1.32 (33.5) 2.500 DIA. (63.5) 3.22 (81.8) .193 (4.9) O-Ring 1.700 Dia. (43.2) 1.76 Dia. (44.7) . IA D 2 ) 36 0.0 (6 2. Removable Front Insert M48 x 1.5-6g thd. .200 (5.1) Max. Panel M48 x 1.5-6g Thd. .200 (5.1) Max. Panel Fiber Optics Jarn Nut 3.96 (100.5) Polarizing Flanges 2.02 (51.2) 2.64 (67.1) .193 (4.9) 2.500 DIA. (63.5) 1.76 Dia. (44.7) . IA D 2 ) 36 0.0 (6 2. M48 x 1.5-6g Thd. .200 (5.1) Max. Panel Recommended Panel Cutouts Recommended Panel Cutouts 2 and 4 Channel FOMC 2 8 Channel FOMC 7 FOMC 2 FOMC 7 E 1.073 +.010 -.000 (27.25 + 0.25) -0.00) DIA 1.064 BSC (27.03) Ø.005 .126 + _ .002 DIA. CSK 82˚ x .230 + _ .005 1.064 BSC (27.03) 1.016 + .000 -.005 (25.80 + 0.00 -0.13) +.015 Ø2.000 -.000 2.000 (50.8) (50.8 +.038 -.0.0) 1.821 + .005 -.000 (48.25 + 0.13) -0.00) Ø.253 +_ .002 Ø.005 CSK B2˚ x .507+/- .010 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 shown in inches (mm) Specifications and dimensions subject to change E-28 www.ittcannon.com ca_E1-E68:Layout 1 2/10/11 9:37 AM Page 29 Cannon Fiber Optics Design Guide Specification Comparison Contact Assembly FERRULE, OPTICAL TIP, TERMINUS "O" RING, FRONT SPRING "O" RING REAR BODY. REAR FERRULE TUBE, SUPPORT ∆ TIP I.D. .175 (4.44) MAX. DIA. 1.300 (33.02) MAX. .170 (4.32) MAX. DIA. FIBER BUFFER DIA .230 (5.84) MAX. DIA. How to Order – Contacts How to Order - Contacts FOMC - T - 10 - 1270 ITT SERIES TERMINUS ASSEMBLY BUFFER DIAMETER TIP TIP (I.D. in tenths of microns) SERIES FOMC - Fiber Optic Multi-Channel 1270 - 127.0 μm min. 1300 - 130.0 μm min. 1440 - 144.0 μm min. TERMINUS ASSEMBLY BUFFER DIAMETER (in millimeters) 05 - 0.5 mm Buffer 10 - 1.0 mm Buffer 11 - 1.1 mm Buffer Coupling Performance Coupling Performance Fiber Optics TOTAL SAMPLES = 3056 MEAN = 0.93 SID. DEV. = 0.32 MINIMUM = 0 MAXIMUM = 2.2 900 800 50/125 FIBER CERAMIC ALIGNMENT TIP CONTACTS 700 FREQUENCY 600 500 400 E 300 200 100 0 0 0.5 1 1.5 CONNECTOR LOSS (dB) Dimensions shown in inches (mm) Specifications and dimensions subject to change www.ittcannon.com E-29 2 2.5