Eric The Tbolt requires a -12 volt line for the RS232 interface-it so happens that somewhat less than -12 will work as most RS232 line receivers have significant margin on the required negative voltage for proper signal detection. (and the positive too-but that's another story) So using -6 or -7 volts will provide a workable RS232 output from the Tbolt for pretty much any RS232 input it is connected to, but its hardly standard. Much better to provide a -12 supply and keep everything standard. The -12 current requirement is minimal-just a milliamp or two. See prior posts for the Tbolt power rail current requirements. DaveB, NZ
----- Original Message ----- From: "Eric Haskell" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, May 23, 2008 5:05 PM Subject: [time-nuts] Thunderbolt Power Supply >I have what appears to be the same module pictured for the group buy >but > from another US source who was selling on the Agilent group. The > Trimble > data sheet he provided said it is Trimble PN 41562-30 and requires > +12, -7 > and +5Vdc. He had -7 to -8 hand written aroumd the the printed -7. > The > group buy this group is using -12 instrad of -7Vdc. I assume this > low > current line is regulated on the Trimble module so it is safe to > apply -12 > VDC to my unit as well? What is the model and supplier of the power > brick > for the group buy? Will TAPR offer the power supply seperatly? > > Regards, > Eric > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG. Version: 8.0.100 / Virus Database: 269.24.0/1461 - Release Date: 22/05/2008 16:44 _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
