Honeywell 621-4350 Description Description Honeywell 5V DC TTL Input Related products HONEYWELL STD924-A1A-00000-MB.3H+XXXX HONEYWELL 621-9990 HONEYWELL 620-1690C HONEYWELL 621-3552RC HONEYWELL DM106-0-A-00-0-R-1-00000-000-E0 HONEYWELL AX51-061-001