The PS1201C02 not Compatible with the W8600
The PS1201C02 power supply does not provide a connection for the W8600 remote indicator. The PS1201C02 is for a power box without the terminal strip as in photo below on left. If your power box has a terminal strip for the W8600, then this supply does not have the connection for that terminal strip.
If your powerbox has an unused terminal strip because you are not using the W8600, then you can use this power supply and internally not connect the unused terminal strip.
The PS1202C00 provides a connection for the W8600. Honeywell offers the option of replacing the complete powerbox PS1202B12J.
Photo shows power box with and without the terminal strip.