i50 Manual (5.51)
Page 61
© 2018 Datalink Systems, Inc.
www.datalinksystemsinc.com
15.0 I/O Configuration
15.1 Digital Inputs
Digital inputs can be configured in the following ways:
-
General Input. Used to monitor external circuits.
-
Priority Input. When active, i50 will not enter sleep mode.
-
Alert Input. Used to trigger panic alerts. See section 15.4.
-
Engine-On. Indicates when engine is running (used to count engine hours and detect
idling). See section 6.4 for details.
-
Geofence. This input causes the i50 to generate a self-geofence, and then send an
alert if it moves more than 500 metres from this location.
-
Check Bus Input. Used with the Check Bus Output digital output mode. This input
indicates that the driver has checked a bus for remaining passengers.
Each input has a polarity setting, which indicates the active state (high or low voltage). Note that the
four digital input lines have internal pull-up resistors, and will default to a high voltage state if
disconnected. Input changes (programmable in the i50 settings) can be sent to the server when the
input is configured for any use except alert input.
15.2 Analog Inputs
The
i50’s analog inputs are monitored while the i50 is awake. If the ADC1/2 High/Low settings are
non-zero, then alerts are sent when the input voltages exceed the high threshold, or fall below the
low threshold. Regardless of these high/low settings, the ADC values can be sent back to the server
using the advanced GPS format.
