Title: Communication problem of the Beckman 406 A/I module with KARAT 8.0 – Does not appear in Auto Configuration

Hello everyone, I am trying to integrate a Beckman 406 A/I (Analog Interface) module into a Beckman System Gold system with KARAT 8.0, but the module does not appear in Auto Configuration. The goal is to connect a Water 420 conductivity detector through it. The rest of the modules (125, 127, 168, 508…) work correctly in the DB15 chain. Main symptom: - The 406 powers on (PWR and CPU OK), but does not communicate via the Gold bus when I start an automatic configuration that detects any other module but not the 406 A/I module. My tests are always done with the same DB15 cable with which the rest of the modules work via automatic configuration. Final goal: To be able to use the 406 as A/D for an external detector (Waters 432) and display the signal in KARAT 8.0. I appreciate any guidance, photos of the board, component references, or similar experiences. Thanks