Can the FX-10 support both 2-wire and 4-wire smoke detectors on the same panel?

Yes, the FX-10 supports both 2-wire and 4-wire smoke detectors. 2-wire detectors connect directly to the 10 available Initiating Device Circuits (IDCs), while 4-wire detectors like the 741U are supported by using the auxiliary power output (Page 2) [1].

The panel provides a 0.5 amp auxiliary output that can be programmed as resettable specifically to accommodate 4-wire detector power requirements (Page 1) [1].