User Guide Owner's manual
European models
• MLC 52 RS EU — European two-gang size. Controls the display device by either IR 
or RS-232.
• MLC 52 RS EU VC — European two-gang size. Controls the display device by either 
IR or RS-232. This model has a volume control knob to control an amplifier such as 
an Extron MPA Mini Power Amplifier (purchased separately).
MK models
• MLC 52 RS MK — UK one-gang size. Controls the display device by either IR or 
RS-232.
• MLC 52 RS MK VC — UK two-gang size. Controls the display device by either IR 
or RS-232. This model has a volume control knob to control an amplifier such as an 
Extron MPA Mini Power Amplifier (purchased separately).
The cabling, operation, and setup are identical for all MLC 52 models. All have the same 
button functionality. 
Standard Features
• IR and RS-232 ports for universal display device control — The MLC 52 has a 
dedicated port for communicating with virtually any projector or display via infrared 
signal. The MLC 52 RS models also have ports for unidirectional RS-232 wired serial 
control. Projector control drivers can be downloaded from www.extron.com or can 
be created using the MLC 52 configuration program.
• Discrete On and Off display device power controls — These controls simplify 
system operations and eliminate the need for a handheld display or projector remote 
control.
• Configurable, backlit buttons — The front panel buttons can be set up to control 
display device power, volume, input selection, or any other IR or RS-232 command 
function supported by the device. The buttons are backlit and can be custom labeled, 
offering easy operation in low-light environments.
• Macro and toggle button modes — Each button on the MLC can be programmed 
to send out up to four IR or serial commands. You can set each button to issue all its 
commands with one press (macro mode) or to issue its commands one at a time, in 
sequence, with each button press (toggle mode). 
• Front panel configuration port — This RS-232 serial port enables advanced 
configuration, driver downloads, and firmware updates to be performed from the 
front panel without the need to remove the controller from its mounting. The optional 
Extron configuration cable (part number 70-335-01) can be used to connect the 
MLC 52 to the RS-232 port of the computer. 
• Three configuration methods — The MLC 52 can be configured easily using the 
following methods:
• IR learning — Allows the MLC 52 to be set up directly from the remote control 
of the display device without the need for software.
• IR data transfer — Duplicates complete configuration information from one 
MLC 52 model to another without cables or software.
• Configuration software — Combined with one of the many IR or RS-232 
drivers that are provided with the controller on DVD or available on the Extron 
website, the Extron MLC 52 Configuration Program provides fast and simple 
setup.
MLC 52 MediaLink Controllers • Introduction 2










