The STM2 has two modes: single wire which requires the switch to have a DC output where the polarity is reversed to indicate through/out position (the switch controllers use red/green LEDs), and two-wire mode where a voltage on either of the two inputs provides the switch position to the STM2.
IIRC, the MTH Realtrax switches use incandescent lights so you'll need the two-wire mode. Try the two-wire Atlas example in the owner's manual.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .