Chapter 4: Hardware interfaces
TT-98-129218-A
Discrete I/O interface
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Default configuration of I/O pins
The built-in web interface of the terminal offers a page for configuring the I/O pins.
The default configuration of the I/O pins is as follows:
•
Pin 1: Ringer output.
(Default setting: Normally open)
Pin 1 acts as a built-in switch in the terminal. By default, this pin is internally connected to
Ground when the terminal is notified of an incoming call from the satellite interface. When the
call is answered, or the caller gives up and releases the call, the pin is disconnected (open).
•
Pin 2: Warning/Error output.
(Default setting: Normally open)
Pin 2 acts as a built-in switch in the terminal. By default, this pin is internally connected to
Ground when there is an active warning/error condition in the terminal. The pin stays
connected to ground until all warnings/errors are cleared.
•
Pin 3: Mute output.
(Default setting: Normally open)
Pin 3 acts as a built-in switch in the terminal. By default, this pin is internally connected to
Ground as long as there is a phone call in progress. This signal can be used to mute external
equipment.
When the call is released, the pin is disconnected (open).
•
Pin 4: Radio silence input.
(Default setting: Active Low)
By default, pin 4 is activated when externally connected to Ground. When pin 4 is activated,
the terminal observes Radio Silence. The terminal gracefully closes all open connections, and
deregisters from the BGAN network. No transmission is allowed until the pin is deactivated
(disconnected from Ground).
•
Pin 5/8: Ignition input.
(Default setting: Active high)
The ignition function can be used to turn on/off the terminal by means of an external signal.
The ignition function uses pin 5 together with pin 8 (DC in). Connect the appropriate pin to the
ignition switch as follows:
Active high (default): Connect pin 5 to Ground. Connect pin 8 to “high” (10.5-32 V DC) when
the ignition is on.
Active low: Connect pin 8 to positive DC voltage (10.5-32 V DC). Connect pin 5 to Ground
(< 1.2 V DC) when the ignition is on.
•
Pin 6: Ground.
(Non-configurable)
Pin 6 can be used as an external connection to ground. Pin 6 is connected to Ground in the
terminal.
•
Pin 7: DC output.
(Non-configurable)
Pin 7 can be used as a DC output. The voltage on pin 7 is 9-15 V and the output can supply up
to 50 mA. Pin 7 can be used as power supply to a relay, ringer or similar.
For information on how to configure the I/O pins, see the user manual for the
SAILOR 150 FleetBroadband system.
