https://community.oxmaint.com/discussion-forum/compatible-replacements-for-pf525-firmware-revisions-fw-1-003-to-fw-5-001
Compatible Replacements for PF525 Firmware Revisions: FW 1.003 to FW 5.001 | Oxmaint Community
I recently attempted to upgrade a 525 control module from FW 1.003 to FW 5.001 while it was online. Unfortunately, I faced issues with communication and keying...