KVH Industries TracPhone FB250 Installation Manual page 80

4.8.3 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.
This pin changes state from low to high 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 changes back to low.
• Pin 2: Warning/Error output
This pin provides an external signal that indicates active warning/error
condition(s). The signal stays active until all warnings/errors are cleared.
• Pin 3: Mute output.
The mute output pin provides an external signal that is active during a
phone call. The signal can be used to mute external equipment.
• Pin 4: Radio silence input.
When active 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.
• Pin 5/8: Ignition input.
Normally not used in maritime installations. Use Remote on/off in the
power connector instead.
The ignition function uses pin 5 together with pin 8 (DC in). Connect the
appropriate pin to the ignition key switch.
If the input should be active high, connect pin 5 to Ground, and use pin 8
to switch on the terminal by pulling it high (10-32 V DC).
If the input should be active low, connect pin 8 to positive DC voltage, and
use pin 5 to switch on the terminal by pulling it low (< 1.2 V DC).
Pin 7 (non-configurable): Apart from the 5 configurable inputs/outputs, the DC
connector has an additional output pin, pin 7 DC output, which can be
connected to a ringer, relay or similar. The output voltage is 9-15 V, 50 mA.
For information on how to configure the I/O pins, see the user manual for the
TracPhone FB500 and TracPhone FB250 systems.
Chapter 4: Hardware interfaces
Discrete I/O interface 67