3-3MLC 226 Series • Front Panel Features and Basic Operation
PRELIMINARY
•a relay operation—turn relays on or off, or toggle or pulse a relay
• an internal operation—
• change a front panel button’s brightness, color, or flashing
• execute an SIS command for the switcher, or insert delays between executed
commands
• turn the digital output on or off, toggle it, or pulse it
•a user-defined RS-232 operation—issue a non-driver-associated RS-232 com-
mand (one that you programmed separately) via a specific port (IR/Serial Out A,
B, C; or the projector control port) or an internal command for the MLC, itself.
By default all buttons illuminate brightly when selected (active), and light dimly
when deselected. The button caps are removable so the button labels can be
changed.
1
Projector On/Off buttons — After they have been configured, press the On
button to turn the projector or display device on, and press the Off button to
power it off. Only one of these two buttons can be selected (active) at once.
Via the configuration software, other functions and relays can be associated
with each of these buttons.
2
Function/room control buttons and
3
input selection buttons — Each of
these buttons can be set several functions apiece, depending on how the MLC
is set up and what mode is active. Each button can be configured to control
the MLC’s relays, execute the IR or RS-232 commands of your choice, or
trigger event scripts and/or port monitoring.
The relays can be used to control items in the room such as a projector lift,
screen motor, or lighting. For details on how the relays operate and can be
configured, see the installation instructions in chapter 2 and the configuration
software information in chapter 4.
2
Function/room control buttons — These have the same
capabilities as the input selection buttons (
3
), but are
typically used for triggering commands and functions other
than input selection. The F1, F2, and F3 buttons on the
optional IR 402 remote control correspond to these buttons.
By default these three buttons are each associated with a
latching relay, as shown at right. However, any software-
based configuration, regardless of whether the function
buttons are configured or not, overrides the default associtions between
these buttons and the relays.
3
Input selection buttons — These buttons,
labeled 1 through 6, have the same capabilities
as the function/room buttons (
2
) and can be
configured to perform a variety of functions.
By default they are a mutually exclusive group
(only one of these buttons can be selected at a
time), and each button has an Extron input
switching SIS command (1!, 2!, 3!, and so forth)
associated with it and bidirectional communication via the MLC’s MLS
RS-232 port. See the picture at right.
Alternatively, the buttons can be reconfigured (via software) to select
different inputs and to trigger different commands to be issued. See
chapters 4 and 5 for details.
Press an input selection button to select the desired audio and video
input on the projector or an optional Extron switcher. The button lights
brighter and remains lit while an audio-video input is selected.
Relay
1
Relay
2
Relay
3
1
2
3
4
5
6
4!
1!
2!
5!
3!
6!
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