Honeywell 621-0008 Description Description Honeywell Pulse Input 4 Channel Related products HONEYWELL 621-0010 HONEYWELL AX51-061-001 HONEYWELL DM106-0-A-00-0-R-1-00000-000-E0 HONEYWELL 621-6550 HONEYWELL 621-2200 HONEYWELL 620-0053