https://22723182.fs1.hubspotusercontent-na1.net/hubfs/22723182/Controlled%20Files/Software/209827-02_Protocol%20Bundle_0.7.3.15676.zip

Communications Protocol Board Firmware Rev 0.7.3.15676, from versions <0.7.3

For versions earlier than 0.7.3, update using this file first. Then update using version 1.2.6.3021 Service Pack. See product user manual for instructions on how to update firmware on the Protocol Communications board.