Honeywell 621-4500 Description Description Honeywell 12-24V DC Source Input Related products HONEYWELL 51304156-100 HONEYWELL DC3002-0-20A-2-89-0111-EN HONEYWELL STD924-A1A-00000-MB.3H+XXXX HONEYWELL 621-6575 HONEYWELL 621-6550 HONEYWELL 621-9937