Controller Installation Documents CURRENT MODELS Click to View Current Models Model B4Model B4AModel B4-FPModel B5Model B6 DISCONTINUED MODELS Click to View Discontinued Models Model B1Model B2Model B2AModel B3Model B3AModel CModel DModel E1Model E2Model E3 Differences Between Controller ModelsIf you have an older controller, refer to the photo for model identification. Model Comparisons