This article discusses recommended POE injectors  

Occasionally we are asked to recommend a certain brand of POE Injector. Elo cannot provide recommendations for third-party products as we are not able to thoroughly test and guarantee proper functionality. Additionally products change over time and what may have worked at one point may not work after a product update.

However, we have marginally tested the TRENDnet TPE-115GI and the TP-Link TL-POE150S, and these products worked with Elo POE-supported devices. We recommend to test the products yourself to determine whether they are suitable for your application. Elo products equipped with POE capabilities require that the POE source must conform to standard POE+ (802.3at Type 2).