Vansco VMM3120, Руководство пользователя

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12 VMM3120
Inputs
3.1.1.3. Active-High Digital Input Connections
A digital input is typically connected to a switch that is either open or closed.

When an active-high switch is open, the pull-down resistor ensures that no
voltage exists on the input signal, which will be interpreted by the VMM3120
as inactive.

When the switch is closed, the input is connected to battery voltage, which
will be interpreted by the VMM3120 as active.
For an input that is active-high

It must be connected to battery power so that there is a battery connection
when the state of the input changes.

The power provided to the digital switch connected to the input must be
provided through a fuse in the wire harness.
A typical active-high digital input connection is shown below:
Internal to product
Active High
Digital Input
Battery
Application Switch
Figure 3: Active high digital input