Honeywell 621-1251 Description Description Honeywell 16 Point 240V AC Input Isolated Related products HONEYWELL 621-6575 HONEYWELL 621-3560 HONEYWELL 620-1690C HONEYWELL 621-9934 HONEYWELL STD924-A1A-00000-MB.3H+XXXX HONEYWELL 621-3580