Honeywell 621-3580 Description Description Honeywell 320 Point 24V DC Input Related products HONEYWELL DM106-0-A-00-0-R-1-00000-000-E0 HONEYWELL 621-0010 HONEYWELL 621-3552RC HONEYWELL 620-0053 HONEYWELL 620-3590 HONEYWELL 620-3691C