Matrix-orbital LK402-25 Legacy Uživatelský manuál stáhnout pdf (Strana 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

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

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 55 56

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Matrix-orbital LK402-25 Legacy Uživatelský manuál Strana 12