The PS2402B12J is Compatible with the W8600
The PS2402B12J power box provides the terminal strip for the optional W8600E remote indicator. The 120v PS2402B12J replaces any F50A or F50E power box with or without the terminal strip as shown in photo below.
If your power box does not have a terminal strip or has an unused terminal strip, then you can use the PS2402B12J and simply leave the terminal strip unconnected. Otherwise a W8600E would connect with a 4 conductor thermostat wire whereas a W8600F would use a 3 conductor wire.
The PS2402B12J can also be used with the newer W8600F by replacing the internal daughter card, wiring harness and terminal strip with that included with the W8600F. Read More...
Photo shows power box with and without the terminal strip.