Honeywell 621-6550 Description Description Honeywell 24V DC Source Output Related products HONEYWELL 621-6550 HONEYWELL 621-9990 HONEYWELL 621-0010 HONEYWELL DM106-0-A-00-0-R-1-00000-000-E0 HONEYWELL 620-0041 HONEYWELL 620-3691C