Telex KP-812 User Manual page 65

G
GPIO
I
IFB
KP-812 Keypanels User Manual
General Purpose Input / Output. (You may also see this referred simply as "GPI".)
GPIO is a means of controlling devices using switch contact closures, DC voltages, or
similar methods. For example, you can control a lighting system from keypanel keys,
or key a transmitter from a talk key during transmit. Or, simply operate a light or
buzzer for cueing. In ADAM, ADAM CS, and Zeus intercom systems, you can also
control intercom events from external switches. For example, you can activate key
assignments, close or open crosspoints, activate GPI outputs, etc. In CS9000 Series
intercom systems, general purpose control outputs are provided by optional FR9528
Relay Frames (8 relays each). In those systems, a relay may be assigned to an
intercom key on a keypanel using the Relay key assignment type. Pressing the
intercom button activates the relay. ADAM, ADAM CS, and Zeus intercom systems all
have a dedicated GPIO connector (J27 on a Zeus Frame, J903 on an ADAM CS
frame, and J11 on the XCP-ADAM-MC Master Controller Breakout Panel in an ADAM
Intercom System). This connector supports 8 control inputs and 8 control outputs.
Additionally, one or more UIO-256 Universal Input/Output frames may be connected
to the intercom system. Each UIO-256 provides another 16 control inputs and no
control outputs. Control Outputs may be assigned to intercom keys using the Relay
key assignment type, and the intercom keys can then control external devices the
same as the FR9528. Control inputs can be assigned to activate "virtual" key assign-
ments. (A virtual key assignment is a key assignment at an intercom port where there
is not actually any keypanel connected. Basically, you use an external switch to act
like a talk or listen key.) The control inputs and outputs can also be used as condi-
tions for UPL statements in AZedit. Finally, there is a GPIO option available for the
KP-12 keypanel, and a connector module option for the KP-32, which includes GPIO.
These are referred to as "Local" GPIO, since they are assigned and used locally at
the keypanel. Each local GPIO includes 4 control inputs and 4 control outputs.
(Interrupt Foldback) is a special type of communication in which a listener at a particu-
lar intercom output port normally hears an audio program source connected to a
particular intercom port. A keypanel operator can activate a key to interrupt the audio
program source and then talk to the listener. Normal operation resumes when the
keypanel operator releases the key. IFB is typically used to cue on-air-talent. For
example, the news anchor during a news broadcast typically listens to the broadcast
audio mix in an earset (except that the news anchor's own voice audio is removed
from the mix). A director at a keypanel can interrupt the broadcast audio to the news
anchor's earset and provide new information to the news anchor. IFB could also be
used with a PA (public address) system that normally broadcasts background music.
The background music can be interrupted while someone is talking over the PA. IFBs
are set up by defining the IFB inputs and outputs using the intercom system configu-
ration software. The intercom output port is called the IFB output and the program
input port is called the IFB input. IFBs can also be given names which are meaningful
to keypanel operators. Once an IFB has been set up and named, it can be assigned
to any keypanel key (provided that IFB assignment has not been restricted or dis-
abled in the intercom system configuration software). For further information about
IFBs, search "IFB" in AZedit user manual.
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