GTT43A Hardware Manual Revision 1.5 PCB Revision: 3.0 or Higher Revision History Revision Date Description Author st 1.5 December 1 , 2016 Updated Specifications for 3.0 Release Divino th 1.4 June 30 , 2016 Changes made for the release of PCB Rev 3.0.3 Divino nd 1.3 July 22 , 2014 Change to RS422 Pinout, Updated Dimensional Drawing and Martino Header Locations image. th 1.2 May 16 , 2014 Removed V3 Option Martino th 1.1 January 8 , 2014 Minor Details and Formatting Clark th 1.0 October 24 , 2013 Initial Release Clark