Do the Solid State Relays (SSRs) within the DCR100 turn off if the NMEA 2000 power is removed from the DCR100?

Yes, the SSRs within the DCR100 turn off if the NMEA 2000 power is removed from the DCR100. By default, once NMEA 2000 power is reapplied to the DCR100, the individual SSRs will return to the state that they were in at the time power was removed. In other words, the DCR100 remembers whether each SSR was On or Off at the time power was removed, and when the power is reapplied, each SSR is returned to its previous On or Off state. You may optionally configure each channel to always be On when the power is reapplied, or Off when the power is reapplied.