Hi John,
The NI 6115 is available with either a 32 Megasample (MS) or 64 MS buffer. However, these buffers are split between analog input and analog output. This means that when the NI 6115 is purchased with the low-memory option, the board actually has two 16 MS buffers (one for analog input and the other for analog output). When purchased with the high-memory option, the NI 6115 will have two 32 MS buffers.
one sample on the NI 6115 will consume 2 bytes of storage space. This translates to two 32 Megabyte (MB) modules if the NI 6115 is purchased with the 32 MS buffer. If your board has a 64 MS buffer, this means that there will be two on-board memory modules of 64 MB each. One 64 MB memory module will be used for analog input and the other will be used for analog output. This translates to a grand total of either 64 MB or 128 MB of available on-board memory space.
This information was found in the following Knowledge Base article.
How Many Samples Can the NI 6115 or 6120 Acquire into On-Board Memory?
Hope this helps!
Ed Waxler | Applications Engineering | National Instruments
