Electrical Design Aspects - Hengstler eXtendo XF 4 120322 Eli Operating Manual

XF
eXtendo® Thermal Printer Family
With that said, we recommend the following power supply specifications for most 24 VDC
applications.
DC Output Voltage: 24 volts ± 5%
DC Output Current: 6 Amps (=120 Watts nominal)
Hold Up Time: 25 ms minimum
Current Limitations : 16 Amps minimum

4.8 Electrical Design Aspects

An important aspect of the electrical design is about grounding. The high currents during printing
require a solid grounding concept. Typically, the power supply for the printer and for the computer
are separate units with individual grounding. Therefore, the more important it is to keep both
grounding levels closely together.

It is recommended to locate common groundings as close to the printer power connection as
possible rather than at the power supply location. High currents can generate high voltage shifts on
long supply wires. Such high voltage shifts of up to several Volts may cause high compensation
currents which search way through the communication cable (USB, RS232) from the printer to the
computer leading to distortions in communication or even damage of components.
Part No. D-684-399 Mod. No. 4 120322 Eli page 24 of 35