Revision: 5

July 29, 2011

1. Issue found when using the Campbell Scientific CR9000 logger with the SDM-SIO1 where serial flush commands would not be executed correctly under certain timing conditions. This issue is now fixed.

Revision: 4

September 08, 2009

1. Brown out protection added.
2. The SDM-SIO1 now remembers the last valid serial configuration settings between power cycles and will start up using those settings even if the settings are not sent by the datalogger.

Revision: 3

December 10, 2008

1. Changed the minimum turnaround time from transmit to receive down to 3.5 ms when running in RS485 Half duplex mode to cater for sensors which respond with data very quickly.