Copyright 1978, 1982 by AMP Incorporated, Harrisburg, Pa. All Inter- national Rights Reserved. GMP Incorporated products covered by U.S. and Foreign patents and/or patents pending. AMP AMP INCORPORATED AMP* ROTARY CAM, ZERO INSERTION FORCE (ZIF) CONNECTORS WITHOUT WIPING ACTION Instruction Sheet IS 7911 Harrisburg, Pa. 17105 RELEASED J 3+8-82 CLOSED-END, SLOT FOR OPEN-END (C-C] CONNECTOR MATING PC BOARD CLOSEB-END (Daughter Baard) |O-C] CONNECTOR OPEN-END, OPEN-END (0-0) CONNECTOR >s a Dr CONNECTOR Pw , WITHOUT MOUNTING EARS KEVING o> oa cAM RIB ROO BASE CONNECTOR (Typ) PC BOARD WITH BOARD (Mather Board} MOUNTING LOCK EARS (Typ) CONNECTOR DESCRIPTION CENTER. SOLDER TINE WRAP-TYPE RIGHT ANGLE CARD EDGE LINE BOARD W/MTG W/O MTG W/MTG W/O MTG WIMTG W/O MTG | WI/MTG spacine | SLOT EARS EARS EARS EARS EARS EARS EARS SEQ | NON-SEO| NON.SEQ | SEQ | NON-SEQ | NON-SEQ | SEQ] NON-SEQ] NON-SEO | NON-SEQ 100 0-0 531012 | 531021 531029 | s31410} 931413 521416 -- 531395 531398 531035 O-C 631011 | 531020 s3102a | 531417 | 531414 531417 531396 531399 531034 c-c 531010 | 531019 531027 | 531412 f 531415 531641 531397 531400 531033 125 0-0 531015 | 531024 531082 | 5371416! 531421 531424 531401 531404 531037 | O-c 531014 | 531023 531031 | 531419| 531422 531425 531402 531406 531038 c-C 531013 | 531022 531030 | 531470} 531423 531626 531403 531406 531036 156 0-0 531018 | 531026 - Bal627 | 531630 = 531407 531041 o-c | 531017 | 531025 \ 531628 | 531631 | 531408 | 531040 c-c 531016 | 531007 531629 | 531632 ' 531403 531039 Fig. 1 1. INTRODUCTION This instruction sheet (IS) covers installation of AMP Rotary Cam, Zero Insertion Force (ZIF) Connectors without wiping action. See Figure 1. Read this material thoroughly before = starting assembly. Alf dimensions on this sheet are in inches. 2. DESCRIPTION These connectors prevent wear on contacts and printed circuit (pc) board pads by eliminating resistant forces during insertion and extraction of pc boards. They are available with two rows of contacts with .200 in. between them and in-row contact centerline spacing of .100, .125, or .156 in. The connectors accept pc boards with .054 through .070-in. thickness. * Trademark of AMP Incorparated Each connector consists of a housing, contacts, cam followers, and a cam rod. In addition, open-ended connectors have a board lock. In operation, the stainless-steel cam rod lifts the phenolic cam followers which pushes the contacts outward and allows force-free insertion of the mating pc board. Reversing rotation of the cam rod lowers the cam follawers and allows the contacts to close on the pc board pads to provide electrical continuity when the system is energized. There are several cam followers in each connector. The separation between the followers allows for key- ing. Two followers sizes (height variations} are available. When all followers are the same height, all contacts will open simultaneously. When different height followers are used, contacts will open sequen- cially (ie, larger followers will open contacts first). PAGE 1 OF 6IS 7911 AMP ZIF WITHOUT WIPING ACTION CONTACT MATING CLOSED CAM ROD IN CONTACT BOARD OPENED POSITION OPEN IN PLACE CAM , a FOLLOWER CAM ROD IN V CLOSED POSITION CAM } FOLLOWER (Typh | GY POSITIVE RETURN FEATURE (Ref) SS HEIGHT VARIES FOR SEQUENTIAL OPENING QO a WS Fig. 2 The mating ends of the various contacts are identical. The circuit ends are available with either solder tines {straight}, card edge tines (contoured), right-angle solder posts (.025 in. square), or in-line, wrap-type posts (.025 in. square}. Accessories include keying plugs for C-C connectors that provide connector polarization, protective covers that keep debris out of unused connectors, custom cam rods that are used to actuate several connectors mounted end to end, and mounting blocks for attaching card edge connectors to the edge of pc boards. See Figures 5, 6, 9, 11, 12, and 13. 3. INSTALLING CONNECTORS Two connectors can be operated with one cam rod by mounting the connectors end to end (in tandem); however, the total contact pairs must not exceed 110. The mounting ears of end-to-end connectors should be as close as possible with the distance of connectors totaling 110 contact pairs not exceeding 1/16 in. Use the following procedure to determine the maximum distance between mounting ears of end-to- A board fock may be used only on the first connector. See Figure 3. ENO-TO-END DO NOT USE TO RD LOCK 7 5/8 IN. MAXIMUM INSTALLATION FERE FOR 30 CONTACT PAIRS iRef| \ 8 TOP ZA 4 REFERENCE INSERTION 7 LINES (Ref) (Hef] NN 6 s DIAGONAL < LINE p fo NN SIDE ZN 5 rs ze INSERTION oT = wei ~ iRef) Zoe 4 ~ af : ha BASE if I 53 LINE if 2 Qs 3 ~ nf tH =e ~ / mt (il 3 N Ceme BETWEEN Mo 1 / MOUNTING ane NS / EAR a ? , BOARD LOCK 30 40 50 60 70 80 90 0 838110 CAN BE USED HERE TOTAL CONTACT PAIRS Fig. 3 PAGE 2 OF 6AMP ZIF WITHOUT WIPING ACTION end connectors. We suggest that you make a sample setup, including the insertion of the mating pc board in the connector board slot, to make sure all components are aligned before permanently securing the connectors. Add the contact pairs of the two connectors you are going to mount, then refer to the graph in Figure 3 for the allowable distance between connectors. NOTE } An example would be 28- and 22-position connectors. The 50 total positions, which from the graph in Figure 3, allaws approx- imately 5 3/8 in. between connectors. fits always better to be under, rather than over, the approximate dimension. } A. Surface Mounting (Solder Tine and Posted Contacts Figure 4) The procedures explained in the following text cover basic applications. If you have a special application or need additional information, contact your local AMP representative. Wrap-type cennectors can be soldered to a pe board ar they can be panel mounted as described in Paragraph C, Panel Mounting. 1. Using the dimensions provided in Figure 4, make a layout on the base pc board. 2. Align one row of contacts and start them into the holes in the pc board. 3. Rotate the connector until the second raw of contacts is aligned and started into the second row of holes. IS 7911 4. Make sure all contacts are started into the holes, then push evenly on the connector until the housing seats on the pc board. 5. If the connector has mounting ears, secure it to the board (or panel} using No. 4 machine screws and nuts. Edge Mounting (Card Edge Contacts Figure 5) 1. Select a base pe board and connector of the size specified for your application. 2. Using the number of contact positions and the centerline spacing of the contacts, make a pad layout on the board using .052-in.-wide by .350-in.-long pads. DIMENSION SURFACE MOUNT BASE * = = PC BOARD LAYOUT 100 | 380 | 8 .156 .406 200 .048 + .002 DIA HOLE START FIRST (Typ) ROW OF L + o1 CONTACTS TOTAL NUMBER OF CONTACTS INA 00 SINGLE ROW. OR .140 + .003 MINUS ONE, 125 DIA HOLE TIMES K" (Typ) {+ .910) BASE PC BOARD 062 CONTACT PAIRS TIMES IN-LINE CONTACT SPACING me Be MOUNTING NO. 5 BLOCK SELF-TAPPING--" SCREW CAM ROD AND BOARD LOCK MOUNTING BLOCK DESCRIPTION REMOVED FOR -2 Self-Tapping Screws Kit 531250-1 Loose Piece 531250-2 | INSTALLATION -2 Mounting Blocks -1 Mounting Black -2 Rolt Pins Fig. 5 3. if the connector has mounting ears, secure it to the pc board using AMP Mounting Bracket 531250 (see Figure 5}. 4. Solder the contacts to the pe board using the soldering technique described in Paragraph 4, SOLDERING. Panel Mounting (Wrap-Type Connectors) 1. Make a layout on the panel using the dimensions provided in Figure 6. 2. Position the connector on the FRONT of the panel and secure it with No. 4-40 screws, lockwashers, and nuts. See Figure 6. PAGE 3 OF 6IS 7911 LOCKWASHER .188 | TOTAL NUMBER OF | CONTACT PAIRS .300 TIMES IN-ROW Tt | CONTACT SPACING ~ | Pe NO. 4-40 NUT 128 DIA 3 ee (2 7 PANEL NO, 4-40 SCREW Fig. 6 4. SOLDERING Certain cleaning procedures that must be observed BEFORE and AFTER soldering are covered in the following text. solvents. See Figure 7 for list of cleaning RECOMMENDED CLEANING SOLVENTS Isopropyl Alcohol Chlorothene Freon TE Freon TF Freon TC Freon EH Aap Who Fig. 7 CAUTION } When applying flux and sofder use extreme care to prevent efther from entering the cam area, Otherwise. excessive force will AMP ZIF WITHOUT WIPING ACTION 1. Clean the contact posts with a mild flux that will NOT affect polyester materials. 2. Make sure the housing is bottomed on the base pc board. If necessary, use a hoeld-down device to hold the connector in place. 3. Solder the contacts to the pc board. a. Forsurface mounting (post contacts), we recommend that you solder the con- tacts to the pc board using a standard wave soldering technique. b. For edge mounting (card edge solder cantacts), we recommend that you solder the contacts to the pc board using standard hand soldering technique or a solder reflow technique in which you apply solder to the contacts and pc pads, install the connector, and then apply heat to the contact and pad area. The connectors will withstand temperatures up to 105 F (higher under closely controlled periods of time), Heat-sink clips can be used to dissipate heat from the connectors, 4. Clean the assembly with a good commercial cleaner that will not affect plastic or paint. See listing in Figure 7. ff the connector has a board flock, the fock must be removed before cleaning. Close the contacts, pull the ram rod out of the connector, and remove the fock. Check the configuration of the split tip before replacing the ram rod. See Figure 77. CONTACT POSITIONS + 2M BOW NOT TO EXCEED .010 PER INCH. MATING PC BOARD LAYOUT (Dimensions Apply to Both Sides be needed to turn the cam and continuity can 5. Allow connector to dry. If applicable, be affected. replace board lock. 400 TOTAL NUMBER OF : IN-ROW CONTACT 070 i POSITIONS, 066 BOARD LOCK | ' + 003 MINUS ONE, SLOT ~ TOL NON- KEN TIMES K l | { SLOT NA im! ay fF 015* 300 -280 Typ) | MIN | 050-2] be OE .030 M + .005 MIN MAX -290 30" \ (Typ) ~- M+ K + .005 Cc + .005 MIN (Typ} (Typ) (Typ) FOU AL NO. OF *LEADING EDGE FOR TOF AND SIDE ENTRY. IN-ROW CENTERLINE DIMENSIONS SPACING K c | mM . 100 .100 052 092 425 35} 078 1117 of PC Board) 156 56 | 044 [148 Fig. PAGE 4 OF 6 8AMP ZIF WITHOUT WIPING ACTION CAUTION | Cleaning time, temperature, and solution could cause ink markings to come off. Test cleaning procedures should be made with sample connectors to prevent removal of Markings on production connectors. 5. PC BOARD LAYOUT (Figure 8) Refer to the dimensions in Figure 8 for the mating pc board layout. Notice that cutout dimensions have been included for the board lack and keying plug features {the exact location will depend on your application). [wore | if the mating pe board is to be used for side entry into the connector, the leading edge of the board must be tapered with a 30 lead-in chamfer. The finished pe board circuit pads should be free of cracks and depressions. There are two plating techniques that we recommend. The preferred technique is .000050 in. to .00010 in. of low-stress nickle under .000030 in. minimum of non- porous, high-purity soft gold. The gold should be a high-purity (99.9% pure, 80 Knoop gold) to ensure bridging of cracked nickel plating and to ensure the best contact surface. The alternate plating technique that we recommend is close adherence to Military Standard 275 which specifies .000050 in. minimum gold over .00020 in. minimum of low-stress nickle. I caution To fimit flexure or internal plating cracks, waren nickel plating should net exceed .00030 in. KEYING RIBS (Between Cam Inserts} BOTH ENDS OF BOARD SLOT CLOSED Fig. 9 6. KEYING (Figure 9) Intercontact Keying Plugs 530977-1 are designed to polarize connectors that have both ends closed. To install, grip the flat end of the plug with a pair of needle-nosed pliers and insert the plug straight into the connector between the two applicable keying plug ribs until bottomed. IS 7911 Keying plug ribs are located between cam inserts. Do NOT key the connector at any other location. [caution | 7. CAMMING (Figure 10) When the cam rod can easily be slid in and out of the connector, the contacts are in a closed position. With the cam rod in this position, the contacts can be opened by rotating the cam rod CLOCKWISE 90 degrees. THIS END OF BOARD SLOT OPENED [Ref) ARROW INDICATES DIRECTION OF ROTATION FOR OPENING CONTACTS LOCK Fig. 10 Custom cam rods can be made from AMP Cam fod Material 531004-1. The tip must be split and tapered inward ta prevent inter- ference during insertion and extraction of the carn rod. See Figure 11. SPLIT TIP OF CaM ROD 055 DIA -100 MAX a (Refh Fig. 11 8. DUST COVER INSTALLATION (Figure 12) Dust covers are supplied in strips of 3 feet and are recommended for connectors not in use to prevent debris and contaminants from affecting the contacts. To install them, determine the width of the pc board slot, cut a piece from the dust cover strip to that length, open contacts, insert cover, and close contacts. To remove dust caver, open contacts and null cover straight out of connector. PAGE 5 OF 61S 7911 POSITION AMP ZIF WITHOUT WIPING ACTION 10. CLEANING CONNECTORS Connectors suspected of contamination should be cleaned as follows: 1. If connector is equipped with a board lock, remove cam rod, remove board lock, and re-install the cam rod. 2. Open the contacts by rotating the cam rod CLOCKWISE 90 degrees. 3. Clean the contacts with a suitable solvent {see fisting in Figure 7} and a stiff bristled brush. 4. Aijr-dry the connector with filtered com- pressed air. WARMING } Compressed air for cleaning and drying must Fig. 12 9. MOUNTING BLOCK INSTALLATION (Figure 5} AMP Mounting Blocks 531250 are designed to hold edge-mount connectors to pc boards. To install them, first make a cutout on the edge of the pc board using the dimensions shown in Figure 5. Attach the mounting block to the board with .062-in.-diameter pins. Use No. 5 self-tapping screws to secure the be reduced to fess than 30 psi, and effective chip guarding and personal protective equip- ment fincluding eye protection} must be used, 5. If applicable, remove cam rod and replace board lock. See Figure 13 for proper orientation. Always check tip of cam rod before extrac- tian and insertion to be sure it is not deformed and will not damage the components, See connector to the mounting blocks. Figure 17. MATING BOARD LP SLOT Le ae oe a] BOARD Dae y Ae LOCK 4 ~. ie a4 => AT See Neth SSR cana CL CAM ROD MATERIAL 31004-1 HANDLE (Upward) Fig. 13 PAGE 6 OF 6