I9 is a proximity key reader. The reader features four LEDs for control unit or system state visualisation and two LEDs to indicate proximity key approach. It is equipped with an input, an open-collector output and a dip-switch for addressing. It can be directly wired to the serial line of control units equipped with RS-485 ULTRABUS interface (among them, ETR512, ETR256, ETR128 require firmware version 2.0 or higher; ETR100 1.0 or higher). I9 is compatible with Keystone adapters. It is certified IMQ-Allarme EN50131-3 grade 2-3 depending on the system it is installed in, environmental class II