Specifications

i50 Manual (5.10)
Page 52
© 2015 Datalink Systems, Inc.
www.datalinksystemsinc.com
13.0 I/O Configuration
13.1 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 13.4.
- 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.
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.
13.2 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.
13.3 Digital Outputs
Digital Outputs can be configured as follows:
- General Output. Output state can be set in the i50 settings, and/or controlled remotely
from a DataHost client.
- Alert Output. Designed to connect to an external buzzer or siren. This pin changes to
indicate the current alarm state.
- Overspeed. Activates when overspeed condition is detected.
- Network Status. Turns on when connection to server is available.
- GPS Status. Activates when GPS signal is valid.
- RX/TX. Turns on briefly when receiving or transmitting data.
- Satellite mode. Activates when using a satellite modem.
- Awake state. Output is active while unit is awake, and turns off when unit is sleeping or
in periodic wakeup mode. This is the default setting for the VOUT pin.
The output polarity settings control the active switch state. Note that the four digital outputs are
actively pulled to ground when set to a low voltage, but left floating in the high voltage state.