Hi, Fausto,
Thanks for your reply. We understand that the manufacturer recommends using the 5V power supplies that come with the modules. However, for a project in which we are integrating 4-8 E-1608s, using those power supplies does not lend to ease of integration. The use of a PoE switch is the clear solution. We have been using this configuration for a long time. This is the first time such event has happened. We plan to install a UPS in the rack in the future.
The modules were purchased in July/August 2022, purchased from Digikey. They should be under warranty. Here are the serial numbers. Please let me know how to proceed.
2066267
206627B
2050E93
2050EA1
Thanks,
Edward Tong