Matrix Orbital VK204-25 Legacy - Manual (Page 17)

WARNING If connecting a relay, be sure that it is fully clamped using
a diode and capacitor in order to absorb any electro-motive force (EMF)
which will be generated.
2.5 Dallas 1-Wire Bridge
In addition to the six general purpose outputs the VK204-25 offers a Dallas 1-wire bridge, to allow for
an aditional thirty two 1-wire devices to be connected to the display. Please note that the display normally
does not come with the Dallas 1-wire bridge. It will have to be ordered as a custom. Please talk to your sales
representative if you would like this option. See Section 8 on page 33.
Figure 19: Dallas 1-Wire Bridge
NOTE This component is optional and must be custom ordered
2.6 Manual Override
The Manual Override is provided to allow the VK204-25 to be reset to factory defaults. This can be
particularly helpful if the display module has been set to an unknown baud rate or I 2 C Slave Address and
you are no longer able to communicate with it. If you wish to return the module to its default settings you
must:
Matrix Orbital VK204-25 13