Yisrael, 1. I guess the main issue here is reliability: i.e. can it be proven that a certain spacing or PCB construction can lead to a reliability high enough for an interlock? Is this correct? If so, maybe someone can supply numbers to expected reliability of PC traces. I would suspect the chance for an OPEN (e.g. because of SMT component soldering problem + thermal cycling) is even higher than a short through the solder mask.
2. A suggestion: if the interlock action is based on a requirement that every several miliseconds a pulse is supplied through the interlock circuit (like some watchdog timers work), could this lead to a design which is insensitive to shorting or opening the interlock lines? Good luck and have fun moshe ------------------------------------- Name: moshe valdman E-mail: [email protected] Phone: 052-941200, 03-5496369 List-Post: [email protected] Date: 23/06/97 Time: 22:18:17 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -------------------------------------
