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EN-37 7 | Control | 7.4 | External control via GP IO connector
EN
SurroundMonitor 11900 Series
GP IO outputs
SurroundMonitor systems can output control signals for acti-
vating alarm indicators or to control external units and applica-
tions. For each Sub Preset (
Key 1
to
Key 7
), a
GP IO output
or a combination of outputs can be selected to be activated
when activating a Sub Preset by pressing the corresponding
button in the Toolbar.
Example
You have to monitor a Dolby® encoded audio signal of
a video/audio data stream. Because of the delays in the
decoding process, it is often necessary to match audio
and video delays for synchronizing video and audio again.
By selecting the Sub Preset containing the settings for
the Dolby® signal source on the SurroundMonitor, the
according
GP IO outputs
are activated automatically. The
outputs are used to start your external applications and
units controlling the delay for the synchronization of the
video and audio signals.
The state of the 8 GP IO outputs can be active low or active
high
, the output signal timing can be
permanent
or
momen-
tary
. The assignment of more than one output to a single key
is possible. For example, it is possible to use two outputs to get
four switching states.
Please proceed as follows to use the GP IO outputs for
activating external applications or system units:
1. Determine the
GP IO outputs
to be used as
Key Pre-
sets
or for
alarm
function.
2. Disconnect the unit from the power supply.
3. Use a counter plug to connect the
GP IO
connector of
the units to the external applications to be controlled or to
receive the alarm signal. Connect one lead of the transmit-
ting cable to your application with the pin on the counter
plug corresponding to the
GP IO output
you want to use.
Connect the other lead to pin 25 for common potential.
4. Correspondingly, connect the cable to your application
and units.
7.4 | External control via GP IO connector
The SurroundMonitor units can be controlled externally by using keys, switchers, or control signals connected to the the GP IO
connector. The pin assignments are shown in the
connections chapter.
GP IO inputs
All 16 GP IO inputs are
active low
. Use the
Preset Recall
Mode
frame of the
Key Settings
menu to define whether the
GP IO inputs should be used as normal function control inputs
or to activate the User Presets (with external keys or switchers
or with a control signal from an external application).
Factory default setting: All button and Toolbar key functions
can be controlled directly via keys or switchers connected to
the corresponding inputs of the GP IO connector. The
Preset
Recall Mode
is set to
Off
.
Please proceed as follows to use the GP IO inputs for
external recall of User Presets:
1. Disconnect the unit from the power supply.
2. Use a counter plug to connect external keys, switchers, or
control signals to the unit‘s GP IO connector. Connect one
pin of an external key, switcher, or control signal wire to
the pin corresponding to the function key input (pins 1 to
7) you want to switch. Connect the other pin to pin 25 for
common potential.
3. When all keys, switchers or external application control
signals are supplied, connect the counter plug to the
gP
IO
connector of the unit.
4. Connect the unit to power supply and power it on.
5. Press the
Menu
button. The menu system is initialized.
6. Use the < or > button to select the Key Settings menu
tab. The
Key Settings
menu page is displayed.
7. Use
Ù
or
Ú
button to set the focus to the
GPI only
option of the Preset Recall Mode section. Enter the
selection by pressing the
red Sel
(SELECT) key.
8. Click the
Save & Exit
button twice to store the changes
and leave the menu. The unit returns to normal operation.
9. Now you can select another User Preset with the external
keys or switchers. Also, external applications can select
User Presets automatically.