Velleman К8063 - Manual (Page 11)

11
Hook-up
Power supply : The K8063 requires a 9 to 12VDC power supply. Power consumption is 120mA max. per unit
(12V) (e.g. if you have 5 units, you need a power supply capable of delivering at least 5x120 = 600mA). Note : If
the total # of displays exceeds 6, it is required to wire the units according to the drawing below, as the PCB tracks
are unable to handle the large currents that flow when more than 6 units are operated simultaneously.
Furthermore, if more than 15 units are operated at the same time, we recommend to use a separate power supply
for every group of 15 digits, to avoid large currents and to avoid the need for heavy wiring. (Fig 6.0).
Serial port specifications : The K8063 can be hooked up to any serial port which supports the RS232 standard
(e.g. PC COM port). Serial port settings are 2400/8/n/1 (2400 baud, 8 databits, no parity, 1 stopbit).
Fig 6.0
RS232
+V
GND