Programmable Shunts for Dual In-Line Packages (DIP) Instruction Sheet 408-7768 02 NOV 98 RevB Numbered Positions (Recessed) Dot Indicates MachineInsertable Pin One Position Standard Shunt STANDARD | , MACHINE- Removable SHUNT? | INSERTABLE Shunt SHUNTt 495704 436860 t Refer io the Customer Drawings] for Part Dash Numbers and Number of Dual Positions. PC Board Soldered Shunt DIP Header (Socket) Figure 7 1. INTRODUCTION This instruction sheet covers installation and programming procedures for the AMP* DIP Shunts listed in Figure 1. The shunts are used to manually program various types of electronic equipment. All dimensions are in millimeters {with inch equivalents in brackets]. Hustrations are not drawn to scale. NOTE Reasons for reissue of this sheet are provided in Section 6, REVISION SUMMARY. 2. DESCRIPTION Each shunt assembly consists of a thermoplastic housing (standard are black in color, machine insertable are gray) preloaded with pin contacts in a DIP configuration. A recessed dot on the top surface of each housing indicates the pin one position. Machineinsertable shunts are also numbered at each position. Each shunt can be used as supplied (all buses intact), or it can be programmed (bus or buses cut). The shunt can be soldered directly onto a printed circuit (pc} board, or used with a DIP header (sockets) to provide easy removal when programming changes are required. 3. SHUNT PROGRAMMING Select the applicable shunt for the required number of contact positions. Programming is accomplished by cutting the bus (strap) that connects two pins. The bus can be cut before or after installation of the shunt. When programming, the shunt must be solidly NOTE : supported during the procedure. 3.1. Standard Shunt (435704) AMP Programming Tool 4358621 must be used to cut the bus. 1. Make sure shunt is solidly supported so pin contacts will not be deformed when tool is pressed against bus (see Figure 2). 2. Determine specific bus to be cut. Position pointed tool tip across cutout sections of bus. 3. Push straight down on tool handle until bus opens. Repeat procedures, if necessary, for other buses, 3.2. Machine-Insertable Shunt (436860) No special tool is required to program the shunt. The shunt is designed with a defined target area for easy programming with a pointed object such as a stylus, scriber, or ball point pen. A force of 22 to 44 Newtons [5 to 10 pounds] is required to program each shunt position. Follow the same procedure given for the standard shunt. Only light force is required to cut the bus - excessive force could damage the housing. ANP Incorporated, Harrisburg, PA 17105 TOOLING ASSISTANCE CENTER 1-800-722-1111 AMP FAX*/PRODUCT INFO 1-800-522-6752 1of2 This AMP controlled document is subject to change. For latest revision call the AMP FAX number. Copyright 1998 by AMP Incorporated. All Rights Reserved. Trademark LOC B Form 404-25 1/98 Programmable Shunts 408-7768 4, SOLDER BRIDGING Solder bridging is a method of connecting an open bus with solder. Use a small soldering tip (0.76 mm [.030 in.]} and a low temperature solder (60% tin/lead) with a melting temperature of 190C [374F]. Soldering should be done as quickly as possible fo prevent heat buildup in the thermoplastic housing. Care should be used to prevent the solder tip from contacting the housing. Support Triangular Cutout (Ref) Sections Bus Push Shunt Straight Programming Down Tool 4358621= Pointed Tool Tip Programmed Dimension for Standard Shunt 0.51 -0.76 [.020-.030] Typical Bus (Open) Programmed Dimension for Machine-insertable Shunt [oe aoe (Open) 0.25 [.010] Min Required for Standard Shuni Only Figure 2 A bus bar that has been solder bridged may be re-opened by removing the solder. Use a small soldering tip (0.76 mm [.030 in.]) to reheat and wick or vacuum the solder from the bus. Refer to previous CAUTION to prevent damage to the housing. 5. INSTALLING SHUNT 5.1. Standard Shunt (see Figure 3) Use the following steps to ease insertion and prevent deformation of pins. 1. Hold shunt at a slight angle and start one row of contact pins into contact holes. Do NOT overinsert. 2. Rotate shunt until second row of contact pins is aligned with opposite row of contact holes. 3. Make sure all contact pins have started entry into holes. Grip sides of shunt and push contact pins into holes until housing bottoms. 5.2. Machine-Insertable Shunt The shunt can be applied by commercially available integrated circuit (IC) insertion equipment from Universal Instruments Corporation, Binghamton, NY; DynaPert Division of USM Corporation, Boston, MA; or others. Follow the machine manufacturer's requirements and instructions for automatic application of the shunt. Typical Shunt Standoff Figure 3 6. REVISION SUMMARY Revisions to this document include: Per EC 09901001-98: * Removed part numbers 435754 and 382704 * Removed sentence from paragraph 2 2 0f2 Rev B Form 404-33 1/98