Incorporated, 1979 by AMP Copyright 1971, 1973 , 1976 , Harrisbure, All International Rights Reserved. AMP Incorporated Pa. products covered by U.S. and Foreign patents and/or patents pending. AMP. AMP* TWIN LEAF M Instruction Sheet IS 7498 OTHER-DAUGHTER FY mie 8) 120) 21048) CONNECTORS IR ems aA) | RELEASED] 2-20-79 | To DAUGHTER HEIGHT BOARD ___ (Ref) (PC Board) 4 ALIGNMENT GROOVE FOR INTERCONTACT KEYING PLUG VERTICAL CONNECTOR WITH ALIGNMENT END CAPS {90 + 5 Typ) STANDOFF RIBS SOLDER MOTHER TINES CONNECTOR BOARD WITHOUT END/ sELE-TAPPING (PC Board) pa wren Tyre CAPS SCREW (2 Reqd) iN-ROW TYPE CONNECTOR ! INTERCONTACT KEYING PLUG _|'NSERTION/ [low contact] INSERTION/ CONTACT OF W/END | W/O END evar a TrypEB [TYPE C [TYPED [EX RACTION | eving PLUG EXTRACTION SPACING | CONTACT CAPS cars I TOOL TOOL 100 Solder Tine 583715 583485 _|[s30030-2 | 530286-1 | - - -- 91081-2 583714-1 91088-1 100 Card Extender | 530268 530291 [530030-2 | 530286-1 - == 91081-2 125 Solder Tine | 583679 583532 _|[530030-1 | 530286-2 [5a0293-1 |530889-1 97081-1 125 Card Extender | 530265 530250 or or 530889-2 91142- 1 150 Solder Tine 5g3692 583407 ; 5837 14-2 91088-2 | Post 583754 583752 Card Extender | 530278 530270 . 156 Solder Tine 583660 583486 5302786-4 | Post 583755 583753 Card Extender 530267 530282 Fig. 1 1. INTRODUCTION This instruction sheet (IS) covers the installation of the AMP Twin Leaf Connectors listed in Figure 1. Read this material, and all referenced material, before starting. 2. DESCRIPTION These connectors are designed for mother-daughter type, surface mount and edge mount printed circuit (pe) board applications. They consist of a semirigid housing (with or without end caps) and pre-assembled solder tine or posted contacts. The standard cannec- tors have row-to-row contact spacing of .200 in, and variations of in-row spacing (see chart in Figure 1). The housings have standoff ribs to provide stability and allow multiple insertions and extractions of the ST RaDEMARK OF AMP |NCORPORATEDO daughter board without damaging solder joints. The lead-in edges of the housings have intercontact keying plug alignment grooves that will facilitate installation of intercontact and on-contact keying plugs. The contacts with solder tines are designed to be installed and soldered to a pe board for two-way circuits. The posted contacts are designed to be inserted and soldered to a pc board then wrapped with a 24-30 AWG wire for three-way circuits. The contacts are supplied pre-assembled in the housings, however if absolutely necessary damaged contacts can be replaced as described on AMP Instruction Sheet IS 7533. PAGE 10F4IS 7498 AMP TWIN LEAF CONNECTORS TYPE & INTERCONTACT KEYING PLUG INTERCONTACT KEYING PLUG TYPE A INTERCONTACTL___ | GY KEYING PLUG TYPE C rif | | | | | | ALIGNMENT GROOVE FOR INTERCONTACT KEYING SLOT ON-CONTACT KEYING PLUG STYLE Il TYPE D INTERCONTACT KEYING PLUGS KEYING PLUGS Fig. 2 3. ATTACHING HARDWARE A. Keying Plugs (Figure 2) One on-contact keying plug configuration and five intercontact keying plug configurations (Types A, B, C, and two styles of Type D) have been designed ta provide polarization for the connectors. Note that Types B, C, and D intercontact keying plugs have wrap-around stabilizers to provide additional stability when required. The proper keying plug, insertion/extraction tool, and connector combinations are listed in the chart in Figure 1. Read the AMP Instruction Sheet (IS 7479) packaged with the tool for the insertion and extraction procedures, and the daughter board cutout required for polarized connectors. B. Board Supports (Rigure 3) The daughter board must be stabilized with board supports to ensure alignment between the printed circuit pads and contacts. This can be accomplished with end cap connector assemblies and/or with card guides. Normally, end cap connector assemblies are recommended for daughter boards with a maximum height of 3 in. and card guides are recommended for daughter boards exceeding 3 in. in height. However, the location, weight, and number of compeonents attached to the daughter board will be determining factors. To attach end cap connector assemblies, determine the location of the mounting holes using the layout shown in Figure 4. Secure the end caps with two No. 2, Type B, self-tapping screws. PAGE 20F 4 There are three types of card guides which are listed in the chart in Figure 3. The method of installing each type is indicated in Figure 3. Read the card guide instruction sheet (IS 7506) for the mounting dimen- sions, and overall dimensional requirements for the pe boards. (Without Standoff) ea DOUBLE SLOTTED Flush Mounted} | [esse DOUBLE SLOTTED | eee SHA (With Standoff) BOARD SUPPORTS ENG CAP PANEL u (Ref) CARD GUIDES PART NO. 583671 PC BOARD TYPE NO. 2. TYPE 6. Single Slotted SELF-TAPPING Mount SCREW (Typ) u Slotted (A/Stando ou {W/O Standoff) Fig. 3AMP Twin LEAF CONNECTORS C. Hold-down Device Hold-down devices should be used to hold the daughter board in position. The specific size and type will depend on your application requirements. AMP does NOT manufacture or market these devices. NOTE } The tolerance for horizontal alignment ts ineluded in the layout dimensions shown in Figure 4. The tolerance for vertical alignment between the daughter board and connector is shown in Figure 7. These connectors are designed to be soldered to mother boards 0.062 to 0.104 in. thick (0.062 in. for IS 7498 double slotted card guides and 0.104 in. maximum for all other applications}. The width of the pe board wiil depend on the applicable board supports. Refer to Figure 4 for the recommended board layout. The pe board fayouts in Figure 4 include dimensions for customer supplied card guides and AMP end cap connector assemblies. if using only card guides, disregard end cap dimensions; if using only end caps, disregard card guide dimensions; #f using beth, refer to the paragraph preceding this note. MOTHER BOARD LAYOUT CUSTOMER PC BOARD SUPPLIED ,035 + .003* {Ref} GUIDE DIA {Typ) 100 + .003 ae \ DATUM oe 4 Ref) + : al + .003 I A BS AL __ 1 a 7 CF ' >> -G 4b 2 4 i 100 DIA | (Raf} --t -- +- f B mt EQUAL spaces * . oa. 100 TYP! | MIN x* + 010 + .003 | EQUAL SPACES? + X* + 010 + ooa->| t EQUAL SPACES * + 2D + .005 8 rr (Ref) DAUGHTER BOARD LAYOUT {Dimensions Apply to Both Sides of PC Board) INTERCONTACT ON-CONTACT | E + .005 Pct ova KEYING KEYING (Ref) BOARD . Sd yeet be eo tet) . 055 NO] [~ | le EQUAL SPACES? + X" + .006 7 + .003 475 Ir / 475 MIN MIN 01 _ ENGAGE rye) | DEPTH ~ + - CONNECTOR | CENTERLINE (Mini (mini i | eC + 005 | a SPACING | neat (Typ) 30 100 .040 129 + = x* + A+ 005 (Typ) 1% 050 13 lw EQUAL SPACES ' + 2X* + .005+ 156 160 le EQUAL SPACES + 2E + .005 *, (Ref) x* + .005 Typ! ROW-TO-ROW | IN-ROW DIMENSIONS CENTERLINE |CENTERLINE }|-,T5 aor sions * DIMENSION X" IS A CUSTOMER CONTROLLED DIMENSION. SPACING SPACING * WARPAGE NOT TO EXCEED .005 PER INCH. 200 100 100 110 045 | 287 | .o92 * HOLES TO BE .047 DIAMETER WHEN POSTED CONTACTS ARE USED. 125 4125 135 072 |.317 | .117 + TOTAL NUMBER OF IN-ROW CONTACT POSITIONS MINUS ONE (1), 455) 1.072 1a? |? TIMES DIMENSION A. 150 150 | .160 |.072 | 387 | .142 m@ USE THESE DIMENSIONS WHEN AMP END CAPS ARE USED. 501. - |.072 | 267 | 142 t BOW NOT TO EXCEED .010 PER INCH. 156 156 166 080 | .379 1.148 Fig. 4 PAGE 3 OF 4IS 7498 AMP TWIN LEAF CONNECTORS STANDOFF RIB (Typ) SOLDER TINES (Raf) MOTHER BOARD ROTATE Fig. 5 4, INSTALLING CONNECTORS A. Post and Solder Tine Contacts Care must be used when installing these connectors, otherwise the contact tines (or posts} may be dam- aged. We recommend the following procedure: 1. Hold the connector at a slight angle to the mother board and start one row of contacts into the contact holes as shown in Figure 5. 2. Rotate the connector until the solder tines {or posts) are aligned with the opposite row of holes in the mother board. 3. Make sure the standoff ribs of the con- nector are bottomed on the mother board, then place a hold-down device on the con- nector to make sure it stays in place during soldering. 4, Solder the tines (or pasts) by passing the bottom of the mother board through the solder wave. 5. Clean the assembly with a good com- mercial solvent that will NOT affect nylon materials. 3. Make sure the solder tines {or posts) have B. Edge Mounting {Card Extender Solder Contacts) ; started entrance into the holes, then push the 1. Select a pc board and connector of the size connector straight down until the standoff ribs specified for the application. bottom on the mother board. 2. Using the number of contact positions and 4. Solder the contact tines (or posts) to the the centerline spacing of the contacts, align the mother board using a wave or a reflow soldering pe board into the connector and push the board technique. If wave soldering proceed as follows: until it bottoms in the connector. \ wid exe nna wil NOT ios an avien Hold-down devices should be used to materials. 2. If required, install keying plug(s) using the appropriate insertion tool. See AMP Instruction Sheet IS 7479. PAGE40F4 hold the daughter board in position. See Paragraph 3.C, Hold-down Device." 3. Solder the contacts to the pc board using either reflow soldering or hand soldering.