Brigs ATS (Symphony II) question

Briggs & Stratton generator troubleshooting
Post Reply
New Member
New Member
Posts: 1
Joined: Mon Oct 19, 2020 1:17 pm

I am considering using a Briggs Symphony II ATS on my install....there is very little technical information out on the web on this ATS (I believe made by Eaton).

There are 2 signal wires running between the ATS and genset: one is labeled GND the other is labeled T/R.

Assuming GND=ground. (my multimeter will confirm this)

Can anyone tell me what type of signal is being sent on the t/r conductor? I have checked to see if it is a open/closed circut and checked it for voltage on the ATS end, but of no avail. Does the Genset send voltage back to the ATS?
Site Admin
Site Admin
Posts: 5998
Joined: Sat Aug 04, 2018 8:46 pm
Location: Clawson, MI

Briggs isn't my strong spot, but I believe they use a communication cable between the gen and switch so that switch issues can be reported to the gen's controller. I don't believe this is a voltage as much as a serial communications signal.
Generac tech for over 12 years. I'm here to help!
"The only source of knowledge is experience" -Albert Einstein
Looking for Generac parts? Gentek Power offers the full line of Generac replacement parts! Shop Gentek Power Generac Parts
A list of my favorite Generator & Electrical Tools!
Top Contributor
Top Contributor
Posts: 75
Joined: Tue Sep 15, 2020 8:42 am

Yes it is communication signal. The only signal needed to work correctly is the 240 volt sense signal. When the generator powers up the 240 volt power sends the signal to the ats controler. Not quite sure how much communication is available the other signal but is not required to be hooked up. Pretty simple control system
Post Reply