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What replaced XPSAM? What are the differences between XPSAM and the XPSAF?

The XPSAM is quite an old model that was initially replaced by the XPSAF - providing your application did not require 1NC output, otherwise please check bottom note.
For a comparison between the XPSAM & XPSAF please check please check the attached file "XPSAM XPSAF"

The XPSAF is now obsolete as well and was replaced by XPSUAF.
For a comparison between them please check please check pages 1-7 of the attached file "XPSUAF_AF, AFL"

NOTE:
Please note, most often the XPSAM would be replaced by XPSAK, please see FA140672 for details of this.