Matrix Orbital LK402-25 Legacy - Manual (Page 12)

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 LK402-25 offers an Optional Dallas 1-wire bridge, to
allow for an aditional thirty two 1-wire devices to be connected to the display. See Section 8 on page 28.
This header can be populated by default. Please contact sales for more information.
Figure 14: Dallas 1-Wire Bridge
2.6 Manual Override
The Manual Override is provided to allow the LK402-25 to be reset to some of the 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:
1. Power off the display module.
2. Place a Jumper on the Manual Override pins.
3. Power up the display module.
4. The display module is now set to its default values listed below in
table 1 .
5. Edit and save settings.
Figure 15: Manual Override Jumper
Matrix Orbital LK402-25 8