1. This DD version DEVICE_REV2, DD_REV1 is only for EasyClean(EC500) user. Currently it is NOT certified by FieldComm Group.
2. If you do not use EasyClean feature, DD version DEVICE_REV1, DD_REV1 should be used. The file could be found at FCG(https://www.fieldcommgroup.org/) or MT website(https://www.mt.com/de/en/home/library/software-downloads/process-analytics/m400-2-wire-g2-hart-rev1-dd1.html) 