I couldn't find the System Sensor i3 series specifically listed in the provided manuals. To verify if these detectors are compatible, you must refer to the compatibility list P/N 3101019-EN for a complete list of approved detector models and quantities (Page 102) [1].
The FX-5 IDC zones support two-wire smoke detectors with a maximum detector standby current of 3.0 mA per circuit (Page 102) [1].
