To convert FX-5 IDC zones to Class A, you must pair two adjacent Class B zones into a single Class A circuit through the panel's programming menu. The FX-5 supports up to two Class A IDCs, and each Class A circuit reduces the total number of available Class B zones by two (Page 1) [1].
Identify the zone pairs to be converted; the FX-5 can be configured for 1 Class A (leaving 3 Class B) or 2 Class A (leaving 1 Class B) circuits (Page 1) [1].
Enter the panel programming mode.
Navigate to the IDC Class program option (Page 39) [1].
Change the value for the desired IDC from "Class B" to "Class A" (Page 39) [1].
Wire the circuit in a loop, starting from the primary zone terminals and returning to the paired zone terminals as specified in the control panel technical reference manual (Page 1) [1].
