Printing system with thermal block e.g. for printing on labels - connected with electronic control unit across several control leads, each consisting of two lines controlled counter phase

摘要

An antivalent interface lead drive (5) is arranged at each end of each control lead (6), which is connected with the electronic control unit (2) or the thermal block (1). A direction logic circuit (8,9) is respectively provided at each side of the control leads. A monitoring signal is transmitted from the thermal block (1) to the electronic control unit by means of a control lead. Each control lead (3) likewise consists of two lines (4) controlled counter phase, for transmitting the monitoring signals. ADVANTAGE - Facilitates interference-free transmission of pulse with any length of control line.