KVH Industries FB250, Installation Manual

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Chapter 4: Hardware interfaces
Discrete I/O interface 79
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4.9.3 Default configuration of I/O pins
The built-in web interface of the terminal offers a page for configuring the I/O
pins.
The functions of the I/O pins are as follows:
Pin 1: Ringer output.
Pin 1 acts as a built-in switch in the terminal. You can configure Pin 1 to be
Normally closed or Normally open.
• Normally closed (default):
The internal switch at pin 1 is normally closed (pin 1 is connected to
ground). When the terminal is notified of an incoming call from the
satellite interface, the switch opens (no connection to ground). When the
call is answered, or the caller gives up and releases the call, the switch is
closed again.
• Normally Open:
The internal switch at pin 1 is normally open (no connection to ground).
When the terminal is notified of an incoming call from the satellite
interface, the switch is closed (pin 1 is connected to ground). When the call
is answered, or the caller gives up and releases the call, the switch is
opened again.
Pin 2: Warning/Error output.
Pin 2 acts as a built-in switch in the terminal. Pin 2 can be used to provide an
external signal that indicates active warning/error condition(s). You can
configure pin 2 to be Normally closed or Normally open.
• Normally Closed (default):
The internal switch at pin 2 is normally closed (pin 2 is connected to
ground). When an alarm occurs, the switch opens (no connection to
ground). The switch is closed again when all warnings/errors are cleared.
• Normally Open:
The internal switch at pin 2 is normally open (no connection to ground).
When an alarm occurs, the switch is closed (connected to ground). The
switch is opened again when all warnings/errors are cleared.
Note
Do not use the Ringer output if you have enabled Local exchange.
For information on Local exchange, refer to the User manual.