Controller for N3300, N3600 & FAS2020 — P/N 111-00237 / 111-00237+E3 / 111-00451+A0 / 111-00451

Replacement controller module compatible with N3300, N3600 and FAS2020 systems. Matches part numbers 111-00237, 111-00237+E3, 111-00451+A0 and 111-00451 for straightforward installation and interchangeability with the listed units.