The USB input/output modules in the USB-stick format are present in 3 designs. Two relay outputs (closer), 8 TTL inputs/outputs or 8 opto-coupler inputs. These can be connected via a D-SUB9 socket. A status-LED signals the USB-access to the stick. It supports most standard USB 2.0 and USB 1.1. The transmission rates are 12 M bit / s or 1.5 M bit / s. The accompanying driver library DELIB enables an easy addressing of the module. With this, all the corresponding functions are made available. A small VB test programme as well as all kinds ofexample software are provided on the CD. Up to eight USB modules can be used by setting an ID number for each PC