Honeywell 621-4500 Description Description Honeywell 12-24V DC Source Input Related products HONEYWELL 621-3580 HONEYWELL C7027A1031 HONEYWELL 621-9934 HONEYWELL 621-6575 HONEYWELL STD924-A1A-00000-MB.3H+XXXX HONEYWELL 620-0041