› M1 Support Forum › SYSTEM SENSOR SMOKES This topic has 2 replies, 2 voices, and was last updated February 23, 2022 at 12:42 pm by Robert Little. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts February 18, 2022 at 6:53 pm #5898 Robert Little According to the M1 manual, the SS 2wt-b will work with the M1. Question is will the 2wta-b also work? I like the sounder in each smoke. February 23, 2022 at 11:06 am #5904 Brad Weeks Only Zone 16 will support a 2-Wire Smoke Loop and those detectors must be listed on page 6 of the M1 Installation Manual to make sure they are compatible with the M1. If not listed on Page 6 the smoke is not compatible the the M1! February 23, 2022 at 12:42 pm #5907 Robert Little Thanks, Brad. Author Posts Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In