HONEYWELL 621-9937 Description Description HONEYWELL PARALLEL I/O Related products HONEYWELL 620-1690C HONEYWELL 620-1690 HONEYWELL 621-3580 HONEYWELL DM106-0-A-00-0-R-1-00000-000-E0 HONEYWELL 621-9990 HONEYWELL 620-0090