[KBA-78954] Magstripe readers not working with some Mercury MR Series 3 panels
This article explains why standard magstripe readers do not work with Mercury MR Series 3 panels (MR50, MR52, and MR62e panels) that are running a firmware older than 3.21.0, and how to fix it.
If a Mercury MR50, MR52, or MR62e panel is running a firmware older than 3.21.0, paired magstripe readers do not work.
To use magstripe readers, firmware 3.21.0 or later is required on the panels.
Manually upgrade the panel firmware to 3.21.0 or later using the Mercury Installation Assistant Utility (IAU). For information about upgrading panel firmware, see the Installation Assistant Utility User Guide.