HONEYWELL 621-3550 Description Description HONEYWELL I/O MODULE 24VDC SINK INPUT 16-PT Related products HONEYWELL 621-9990 HONEYWELL 621-2200 HONEYWELL C7027A1031 HONEYWELL 620-3691C HONEYWELL STD924-A1A-00000-MB.3H+XXXX HONEYWELL 620-0090