ADLINK DAQe-2502 - Manual (Page 67)

Operation Theory 57
System Synchronization Interface
SSI uses bi-directional I/O to provide flexible connections between
boards. You can choose each of the seven timing signals and
which board to be the SSI master. The SSI master can drive the
timing signals of the slaves. You can thus achieve better synchro-
nization between boards.
Note that during power-up or reset, the DAQ board resets and
uses its internal timing signals.