SC & FC/PC3 Pull-Proof Fiber Optic Connectors

Transcription

1 SC & FC/PC3 Pull-Proof Fiber Optic Connectors Instructions Termination Procedures for Multimode Field-Mountable Connectors using Hot Melt Adhesive Issue 1, May 1993

2 Contents: A) Warnings, Recommendations and Overview... 3 B) Preparation of Equipment Prior to Mounting... 4 C) Preparing the Connector for Mounting... 5 D) Jacketed Cable Preparation... 6 E) Mounting... 8 F) Scoring... 9 G) Polishing One-Step PC (Domed) Finish H) Final Cleaning I) Mounting Unjacketed/Buffered Fiber J) Connector Assembly and Installation K) 3M SC and FC/PC3 Hot Melt Field Termination Kits in. (8.94 mm).068 in. (1.73 mm).972 in. (24.7 mm).205 in. (5.2 mm).289 in. (7.34 mm) Key-Shell.283 in. (7.19 mm).218 in. (5.54 mm).266 in. (6.75 mm) SC Connector.289 in. (7.34 mm) Crimp Ring Boot.235 in. (5.97 mm) Ø.0984 in. (2.499 mm).925 in. (23.5 mm) 1.97 in. (50.0 mm) SC Connector Ø.094 in. (2.499 mm) FC/PC3 Connector Crimp Ring Boot Ø.386 in. (9.8 mm) Ø.234 in. (5.94 mm).154 in. (3.9 mm).925 in. (23.5 mm) 1.66 in. (15.0 mm) 2.27 in. (57.7 mm) FC/PC3 Connector 2

3 SECTION A Warnings, Recommendations and Overview 1. Most fibers can be mechanically stripped without the aid of chemicals or heat. If the fiber is not mechanically strippable, contact 3M's Training Department or the cable manufacturer for their recommendations. 2. After stripping, isopropyl alcohol (reagent grade, 99% or better) is used to clean the fibers and for cleaning components before connecting them. Isopropyl alcohol may be also used to clean the lapping acetate and stripping tools when necessary. It may be purchased from laboratory supply companies. Do not use acetone for cleaning. 3. Isopropyl alcohol is not shipped with the 3M brand Field Termination Kit. We have, however, included a bottle for the alcohol. Carefully follow safety, health and disposal information on container label or Material Safety Data Sheet for isopropyl alcohol being used. 4. Do not touch any part of the heating block of the Hot Melt Oven during operation. 5. Only use 3M brand Hot Melt connectors in the 3M brand Hot Melt Oven. Warning: Do not view fiber ends if they are laser illuminated. Eye damage may result. Illuminate fiber ends with white light only. 6. The connectors described in this manual have pre radiused PC "domed" ferrule ends to ensure low attenuation and the best reflection performance. All polishing should be done on the "one-step" polishing pad only, as described in this manual. 7. The 3M connectors with PC finishes are completely intermateable with flat finished connectors of the same design. PC to flat terminations actually provide improved performance over flat to flat terminations. PC to PC terminations, as produced according to instructions in this manual, however, offer the best performance. 8. Safety glasses should be worn when working with optical fibers. FOR OVERSEAS REQUIREMENTS 9. WARNING - The power supply cord is intended to serve as the disconnect device. The socket outlet should be near the equipment and should be easily accessible. WARNING - Das Stromversorgungskabel dient als Abschaltvorrichtung. Die Steckdose sollte in der Nahe der Einheit und leicht zunganglich liegen. This manual is for terminating the following Hot Melt connectors: 3M brand 6200 FC/PC3 Hot Melt Connector 3M brand 6300 SC Hot Melt Connector SC Hot Melt Connector FC/PC3 Hot Melt Connector (A) (B) (C) (D) (A) - Strain Relief Boot (B) - Crimp Ring (C) - Connector (D) - Housing (A) (B) (C) 3

4 SECTION B Preparation of Equipment Prior to Mounting 1. TURN THE HOT MELT OVEN ON. THE OVEN REQUIRES FIVE MINUTES TO REACH THE PROPER TEMPERATURE 2. ASSEMBLE THE COOLING STAND (FIG. B1) 3. PREPARE SOLVENT CONTAINER AS LABELED Fill bottle with isopropyl alcohol (reagent grade 99% or better). Carefully follow safety, health and disposal information on container label or Material Safety Data Sheet for isopropyl alcohol being used. Fig. B1 4. PREPARE THE CRIMP TOOL Included in the field termination kit is a crimp tool set. The package includes a base tool and three die sets to be used as follows: Die Marking Cavity Marking Application BIC/ST.151 ST* Bayonet, FC-1 &Biconic.213 TECS 200/230 connector.178 Not used Fig. B2 SC / FC mm Jacketed Cable mm Jacketed Cable.190 Kevlar 1 crimp PPST (Push-Pull ST) mm Jacketed Cable mm Jacketed Cable.226 Kevlar 1 crimp Select the jaw labeled "SC/FC3." Secure the jaws loosely with the thumb screws. Close the jaws to the fully closed position allowing the jaws to align, then tighten the screws (Fig. B2). 4

5 SECTION C Preparing the Connector for Mounting 1. LOAD THE CONNECTOR INTO THE CONNECTOR HOLDER Remove the connector from the foil package just prior to terminating. Insert the connector into the universal connector holder (Fig. C1). This universal holder is used with the following 3M connectors: 3M SC Hot Melt 3M FC/PC3 Hot Melt Fig. C1 2. LOAD THE CONNECTOR AND HOLDER INTO THE HOT MELT OVEN After the five minute warm up period, insert the connector and holder into the Hot Melt Oven (Fig. C2). WARNING! Never touch any part of the heating block of the Hot Melt Oven when loading or unloading the connector holder. Never place a Hot Melt Connector into the oven without the connector holder. Heating block reaches high temperatures during use. Fig. C2 3. DURATION OF HOT MELT HEATING TIME The connector must remain in the oven for at least ONE minute and no more than 10 minutes. While the Hot Melt Connector is heating, the fiber can be prepared for mounting. 5

6 SECTION D Jacketed Cable Preparation The following instructions pertain to mounting on 2.4 mm cable and 3.0 mm cable. See Section I for mounting on 900 µm buffered fibers. 1. SLIP THE STRAIN RELIEF BOOT AND THE CRIMP RING ONTO THE CABLE DO NOT FORGET TO DO THIS STEP. The boot will not fit over a mounted connector assembly so it is essential that it be slipped onto the cable at this time. Slip the smaller diameter of the white boot onto the cable first. Red crimp rings for 2.4 mm cable and black crimp rings for 3.0 mm cable are provided with each connector. Slide the appropriate crimp ring onto the cable, small opening first (Fig. D1). Fig. D1 2. CUT AND REMOVE 1 3/16" (30 mm) OF THE CABLE'S OUTER JACKET Adjust the yellow handled stripper to cut the jacket and not the Kevlar. Using the ruler supplied in the field kit, measure and mark the cable 1 3/16" (30 mm) from the end of the jacket. Close the yellow handled stripper on the cable until the outer jacket is cut (Fig. D2). Remove the jacket with your fingers. Fig. D2 3. CUT AND FLARE THE STRENGTH MEMBERS Gather the Kevlar and pull it off to one side giving it a slight twist. Using the serrated scissors cut the Kevlar leaving about 5/16" (8 mm) sticking out of the outer jacket (Fig. D3). Slip the smaller hole of the blue stripping collar over the buffer and flare out all of the Kevlar evenly (Fig. D4). Reverse the collar and slide the larger hole over the buffer and outer jacket. Push down gently until the stripping collar folds the Kevlar back and seats. Fig. D3 4. HOLD THE CABLE SECURELY Before stripping the buffer it is important to hold the cable in a configuration which will prevent the buffered fiber from being pulled out of the outer jacket. Grasp the end of the outer jacket between your thumb and forefinger. Wind the cable between your fingers (Fig. D5). Squeezing with all fingers will clamp the buffered fiber in the outer jacket. Fig. D4 6 Fig. D5

7 SECTION D Jacketed Cable Preparation 5. BUFFER REMOVAL With the modified No-Nik tool's arrow pointing in the direction of the stripping, remove the fiber's buffer in small bites about 3/16" (5mm). Be sure to remove the stripped material from the tool after each incremental cut. When stripping the last increment, the end of the stripping collar should gently rest against the fiber guide inside of the clearance hole of the No-Nik (Fig. D6). Fig. D6 6. CLEAN THE FIBER WITH ALCOHOL With the collar still in place, moisten a lint free cloth with isopropyl alcohol from the bottle and wipe the fiber clean (Fig. D7). Make sure there is absolutely no buffer residue or dirt on the fiber by holding it to a light and inspecting for a smooth shiny surface. If necessary, wipe the fiber a second time to be sure that it is clean. Carefully follow safety, health and disposal information on container label or Material Safety Data Sheet for isopropyl alcohol being used. Fig. D7 7. REMOVE THE STRIPPING COLLAR Remove the stripping collar and position the cut Kevlar so that it is evenly distributed around the buffer. At this time, verify the strip length dimensions. It is very important that the exposed buffer measures 9/16" (14 mm) from the end of the cut jacket as shown in Fig. D8. (Figure not to scale). Confirm all dimensions using the ruler provided (Fig.D9). Outer Jacket 9/16" (14 mm) 1 3/16" (30 mm) Kevlar 5/16" (8 mm) Fig. D8 Fig. D9 7

8 SECTION E Mounting 1. INSERT THE FIBER INTO THE CONNECTOR Slide the crimp ring up the cable within 1/2" (13 mm) of the end of the jacket and hold the cable directly behind the crimp ring. After the connector has heated for at least one minute, remove the connector holder from the Hot Melt oven. Slowly guide the fiber into the backbone of the connector until the buffer seats at the base of the ferrule. The Kevlar must flare around the back end of the connector (Fig. E1). Fig. E1 If adhesive expands above the backbone during heating, the adhesive has been contaminated with moisture and the connector should not be used. While holding the cable in place, slide the crimp ring over the Kevlar until the ring is seated with the back end of the connector (Fig. E2). If the connector has been out of the oven for more than one minute prior to fiber insertion, place the connector into the Hot Melt oven for one more minute and repeat Step 1. Fig. E2 2. CRIMP THE RING TO THE CONNECTOR AND CABLE Make sure that the crimp ring is fully seated over the back of the connector. Locate the largest cavity marked.190 in the crimp tool. Be sure that it completely covers the upper portion of the ring and crimp the ring to the connector securing the Kevlar (Fig. E3). Re-position the tool using the middle cavity marked.137 for 3.0 mm cable or the smallest cavity marked.120 for 2.4 mm cable and crimp the lower portion of the ring securing the cable's jacket. Be careful not to pinch the cable between the jaws. Fig. E3 3. PLACE THE CONNECTOR HOLDER IN THE COOLING STAND After the connector has been crimped, place the holder with the connector in the cooling stand to allow the adhesive to cool to room temperature, approximately 2 to 3 minutes. 8

9 SECTION F Scoring 1. REMOVE THE CONNECTOR FROM THE HOLDER While holding the load adapter, carefully remove the connector making sure not to damage the protruding fiber (Fig. F1). 2. SCORE THE FIBER Hold the connector in a vertical position with the fiber pointing upward. Score the fiber, by drawing the scoring blade lightly against the fiber just above the adhesive bead (Fig. F2). The fiber should merely be touched and not severed. Fig. F1 3. DETACH THE SCORED FIBER Using your fingers, carefully remove the fiber by pulling straight up from the ferrule. If the fiber is too short, use the scoring tool to gently press against the fiber from the scored side until it breaks along the score mark. Be sure to dispose of all scored fiber ends per company practice. If the fiber should break off accidentally without the benefit of proper scoring, polishing should still be attempted. Fig. F2 4. CHECK THE FIBER END Check the quality of the end using the jeweler's loupe. The fiber should not protrude from the adhesive bead more than one fiber diameter (Fig. F3). If the fiber is longer than one diameter, proceed as follows: Hold the connector in one hand and a sheet of 9 µm or 5 µm aluminum oxide in the other. Using small circular strokes, shorten the fiber to an acceptable length (Fig. F4). 5. SECURE THE STRAIN RELIEF BOOT Fig. F3 While holding the connector slide the boot over the entire crimp ring. There should be approximately 1/16" space between the end of the boot and the back of the connector. For SC Connectors Be sure to align the key on the boot with the flat, smooth side of the connector (Fig. F5). Fig. F4 9 Fig. F5

10 SECTION G Polishing One-Step PC (Domed) Finish Wear Indicator (3 Places) 1. PREPARE THE POLISHING SURFACE Clean the surface of the round polishing pad with a lint free cloth dampened with isopropyl alcohol. Blow clean both sides of a sheet of the one-step lapping film. Place the film shiny side down onto the soft pad. Carefully follow safety, health and disposal information on container label or Material Safety Data Sheet for isopropyl alcohol being used. Fig. G1 2. PREPARE THE POLISHING JIG AND CONNECTOR Wipe the polishing surface of the jig with a lint-free cloth moistened with isopropyl alcohol. Blow the entire jig clean with air. Clean the connector with air only, since wiping it may break the fiber. The polishing jig used in these procedures is designed with three "wear indicators" on its polishing surface (Fig. G1). Each indicator is 0.002" deep. As polishing is done, the surface of the jig will be worn away. Uniform pressure across the jig's surface during polishing will result in areas surrounding the "indicators" to wear evenly. Non uniform pressure will result in one or two indicators disappearing, thereby requiring the jig to be replaced. Fig. G2 3. PERFORM THE POLISH Place the polishing jig on the film. Carefully insert the ferrule into the jig until you feel the fiber touch the surface. This is to ensure that the extended fiber from the ferrule is not broken off below the adhesive level upon initial contact to the lapping film. If the connector does not fit easily into the jig, examine the sides of the ceramic ferrule for adhesive. Any excess adhesive can be removed with a razor blade. The Hot Melt adhesive is softer than conventional epoxies. It is not necessary to apply heavy pressure during polishing. Fig. G3 While holding both the connector and the polishing jig (Fig. G2), slowly perform eight to ten figure 8's without applying pressure on the connector. This step will allow the exposed fiber to become flush with the adhesive bead (Fig. G3). For fiber that has been scored too long, perform additional figure 8's using no pressure. Fig. G4 Once the fiber is supported by the bead, begin applying light pressure on the connector while polishing in a figure 8 motion. Always attempt to polish on fresh areas of the film. Once the ferrule begins to glide smoothly across the film's surface, the remaining adhesive is removed. At this point, perform an additional eight to ten figure 8's to ensure that the fiber is polished flush to the end of the ferrule. Inspect the tip of the ferrule using the jeweler's loupe to be sure that all the adhesive has been removed (Fig. G4). 10

11 SECTION G Polishing One-Step PC (Domed) Finish 4. FINAL INSPECTION After polishing, remove the connector from the polishing jig, clean the ferrule with a lint free cloth moistened with isopropyl alcohol and insert it into the fiber view scope (Fig. G5). The fiber should be free of adhesive and scratches and should be flush with the domed end of the ceramic ferrule (Fig. G6). If scratches or adhesive are present (Fig. G7) perform additional figure 8's using a new sheet of film. Fig. G5 The one-step film can be cleaned with isopropyl alcohol and blown dry for re-use. This sheet can be used to polish two connectors. For fiber flaws left behind because of poor scoring, 3M recommends the use of the 3 µm diamond film (part number ). Fig. G6 Fig. G7 11

12 SECTION H Final Cleaning 1. BLOW THE DUST CAP WITH AIR 2. WIPE THE CERAMIC FERRULE WITH AN ISOPROPYL ALCOHOL DAMPENED LINT-FREE CLOTH (FIG. H1) Be sure to wipe the entire length of the ferrule and the ferrule tip. Carefully follow safety, health and disposal information on container label or Material Safety Data Sheet for isopropyl alcohol being used. Fig. H1 3. BLOW THE FERRULE WITH AIR 4. IMMEDIATELY COVER THE CONNECTOR WITH THE DUST CAP SECTION I Mounting Unjacketed/Buffered Fiber General instructions for preparation for mounting may be found in Sections B and C. 1. SLIP THE STRAIN RELIEF BOOT ONTO THE BUFFERED FIBER SMALL END FIRST (Fig. I1) Fig. I1 2. PLACE THE CRIMP RING ONTO THE STRAIN RELIEF TUBE Measure and mark the clear strain relief tube 3/16" (5 mm) from its end. Slide the smaller diameter of the black 3.0 mm crimp ring onto the tube until the end of the ring aligns with the mark on the tube (Fig. I2). 3. PLACE THE CLEAR TUBE WITH THE CRIMP RING ONTO THE BUFFERED FIBER (Fig. I3) The larger diameter of the crimp ring MUST be towards the end of the fiber. Fig. I2 4. REMOVE 3/4" (19 mm) OF BUFFER USING THE NO-NIK TOOL (Fig. I4) (Refer to section D, step 5). 5. CLEAN THE FIBER WITH ISOPROPYL ALCOHOL. (See section D, step 6). Carefully follow safety, health and disposal information on container label or Material Safety Data Sheet for isopropyl alcohol being used. Fig. I3 12 Fig. I4

13 SECTION I Mounting Unjacketed/Buffered Fiber 6. INSERT THE FIBER INTO THE CONNECTOR Hold the buffered fiber 1/2" (13 mm) from the end of the buffer with the strain relief tube directly behind your fingers. Remove the connector holder from the Hot Melt Oven. If adhesive expands above the backbone during heating, the adhesive has been contaminated with moisture and the connector should not be used. If the connector has been out of the oven for more than one minute prior to inserting the fiber, replace the connector into the Hot Melt Oven for one more minute and repeat Step 6. Fig. I5 Slowly insert the fiber into the connector backbone until the buffer seats at the base of the ferrule (Fig. I5). While holding the buffer in place, slide the strain relief tube with the crimp ring up the buffer until the ring is seated on the back end of the connector. The mark on the clear tube MUST align with the end of the crimp ring before crimping the ring to the connector and tube (Fig. I6). 7. CRIMP THE RING TO THE CONNECTOR AND TUBE Fig. I6 While holding the connector and strain relief tube in place, crimp the upper portion of the ring to the back end of the connector using the cavity marked.190 in the crimp tool (Fig. I7). Reposition the connector to the center cavity marked.137, securing the ring to the tube. Fig. I7 13

14 SECTION J Connector Assembly and Installation 1. SC CONNECTOR ASSEMBLY Once the SC connector has been mounted and polished, the housing can be installed onto the body. A. Standard Density Applications While holding the connector firmly by the boot, align the chamfers on both the connector and housing and snap into place (Fig. J1). A positive click will be heard when the housing is fully engaged. Fig. J1 B. High Density Applications This application does not require the housing to be placed onto the connector body. The high density coupling is used without the sliding housing. 2. CONNECTOR COUPLING CLEANING Only one connection should be made at a time and the dust caps should not be removed until immediately prior to mating. Fig. J2 A. Clean the ceramic ferrule of the connector with an isopropyl alcohol dampened lint-free cloth (Fig. J2) and immediately blow with compressed air. Carefully follow safety, health and disposal information on container label or Material Safety Data Sheet for isopropyl alcohol being used. B. Insert an isopropyl alcohol dampened pipe cleaner into the coupling to remove any foreign particles (Fig. J3). Blow with compressed air. 3. SC CONNECTOR - STANDARD DENSITY MATING Fig. J3 Installation A. Hold the connector by the housing. Align the key on the connector housing with the slot of the coupling (Fig. J4) and push into place with a positive click. (The white line or slot in the housing will not be visible when fully latched). B. Uncap, clean and install the second connector as described above. Removal Fig. J4 A. To release the connector from the coupling, pull back on the connector housing. B. Cover connector and coupling ends with dust caps when not being used. 14

15 SECTION J Connector Assembly and Installation 4. SC CONNECTOR - HIGH DENSITY MATING Installation A. Clean the connector and coupling as described above. B. Hold the connector by the boot. C. Align the connector chamfers with the coupling (Fig. J5) and push into place. Fig. J5 Removal This connector requires a tool to remove it from a coupling. A. Depress the buttons on the tool to raise pulling fingers. B. Position tool prongs over connector and insert into the coupling. C. Release the buttons on the tool to engage the fingers and pull firmly back to release the connector. Fig. J6 5. CONNECTOR - MATING FC/PC3 Installation A. Clean the connector and coupling as described above. B. Engage the key in the slot while holding the connector by the boot (Fig. J6). Make sure that the key remains engaged while tightening the threaded nut. Removal A. To release the connector from the coupling, unscrew the connector and cover all parts with dust caps. 15

16 SECTION K 3M brand SC and FC/PC3 Hot Melt Field Termination Kits DESCRIPTION QTY PRODUCT # 3M brand SC and FC/PC3 Hot Melt Field Termination Kit (110V) M brand SC and FC/PC3 Hot Melt Field Termination Kit (220V) KIT COMPONENTS QTY PART # Scissors Cable Stripper Modified No-Nik Stripper (175 µm) Scribe - blade Fiber View Scope with Adapter Lint Free Cloths (Pkg.) Ferrule Connector Polishing Jig Alcohol Bottle Pipe Cleaners (Pkg.) Jewelers Loupe (7X) Pocket Ruler Crimp Tool Stripping Collar SC and FC/PC Manual Cooling Stand Polishing Pad, One Step Lapping Film, One Step (Pkg.) SC and FC/PC3 Connector Holders Hot Melt Oven, 110V (6350 Kit) Hot Melt Oven, 220V (6351 Kit) "Kevlar" is a trademark of DuPont Co. "ST" is a trademark of AT&T. Important Notice All statements, technical information and recommendations related to the Seller's products are based on information believed to be reliable, but the accuracy or completeness thereof is not guaranteed. Before utilizing the product, the user should determine the suitability of the product for its intended use. The user assumes all risks and liability whatsoever in connection with such use. Any statements or recommendations of the Seller which are not contained in the Seller's current publications shall have no force or effect unless contained in an agreement signed by an authorized officer of the Seller. The statements contained herein are made in lieu of all warranties, express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose which warranties are hereby expressly disclaimed. SELLER SHALL NOT BE LIABLE TO THE USER OR ANY OTHER PERSON UNDER ANY LEGAL THEORY, INCLUDING BUT NOT LIMITED TO NEGLIGENCE OR STRICT LIABILITY, FOR ANY INJURY OR FOR ANY DIRECT OR CONSEQUENTIAL DAMAGES SUSTAINED OR INCURRED BY REASON OF THE USE OF ANY OF THE SELLER'S PRODUCTS THAT WERE DEFECTIVE M Telecom Systems Group 6801 River Place Blvd. Austin, TX / M Litho in U.S.A.