Fire-Lite CAC-5X Class Converter Module for MS-5UD-3 and MS-10UD7(E) FACPProduct Overview CAC 5X Class A Converter Module The CAC 5X Module can be used to convert the Style B (Class B) Initiating Device Circuits to Style D (Class A) and Style Y (Class B) Notification Appliance Circuits to Style Z (Class A). The module connects to J2 on the MS 5UD and MS 10UD main circuit board and to J7 on the MS 10UD. Note that two Class A Converter modules are required for the 10 zone panel. Main Features Plugs into Main Controller Board