HONEYWELL 621-3550 Description Description HONEYWELL I/O MODULE 24VDC SINK INPUT 16-PT Related products HONEYWELL 620-0053 HONEYWELL 621-0000 HONEYWELL 621-0009 HONEYWELL DC3002-0-20A-2-89-0111-EN HONEYWELL AX51-061-001 HONEYWELL 621-6550