Johnson controls temperature stage model S350AA-1

Johnson controls temperature stage model S350AA-1

From the closed printed circuit board MFG - maintenance Storeroom:
Here is a model S350AA-1 Temperature stage module. Used with a Johnson temperature controller such as the A350, it will provide multi-stage equipment control. It was removed from An HVAC control box that did not seem to have ever been installed. The equipment number tag left an area of darker paint so the unit has been on the shelf for a while.