MediaLink Controller with RS-232 and IR Display Control for MK Junction Boxes
Key Features
  • Designed to mount into one-gang MK boxes and enclosures for use in the UK, Middle East, Singapore and other regions using MK-type enclosure
  • Unidirectional RS-232 and IR port for universal display control
  • Discrete ON and OFF display power controls
  • Configurable buttons
  • Dual color, backlit buttons can be labeled for easy identification
The Extron MLC 55 RS MK
Model Version Description Part #
MLC 55 RS MK RS-232 and IR Control – MK 60-1390-23

The Extron MLC 55 RS MK MediaLink® Controller is an economical, easy-to-use keypad controller for common AV functions such as power, input selection, and volume in single display applications. It features a sleek, new look with redesigned backlit buttons and a faceplate that hides the mounting screws and configuration port giving the controller a refined, uncluttered appearance. The MLC 55 RS MK is specifically designed for mounting into a one-gang MK box or enclosure for the United Kingdom, Singapore, Hong Kong and other markets that use MK-type junction. The controller can be configured using the Extron MLC 55,62,64 Series software. The MLC 55 RS MK is available in white.

Simple, Consistent Control in Every Room

The MLC 55 RS MK acts as an extended remote control panel, providing user-friendly control for a display's power, volume, and input selection. Because the controller offers a central point of control for a display devices key functions, it eliminates the need for the display's IR remote control, making operations much more efficient. With the MLC 55 RS MK, there are no misplaced remotes to search for, no confusing menus to navigate, and no dead batteries. No matter what brand of display is installed in each presentation venue, the MLC 55 RS MK MediaLink Controller always provides a consistent control method from room to room. Presenters with little or no training can walk into any room equipped with a MediaLink controller and operate the AV system with minimal effort.

Configurable Buttons for Flexible Control Options

No programming knowledge is necessary to install the MLC 55 RS MK MediaLink Controller. The four lower buttons default to Volume Up, Volume Down, Select PC Input, and Select Video Input. Using MediaLink Configurator these buttons can be configured to send out any RS-232 or IR command supported by the display, making it easy to customize the controller to meet the needs of most single-display AV systems. For example, three of the four buttons could be configured for input selection, with the fourth button dedicated to video mute or auto image. Each button can store up to four separate commands, providing additional flexibility to meet the specific control requirements for most display devices. When a button is configured for Macro mode, all of the stored commands associated with that button are sent with a single button press. In Toggle mode, the button steps through a series of two, three, or four commands, issuing a single command with each press of the button.

Easy to Configure

No programming knowledge is necessary to configure MLC 55 RS MK MediaLink Controllers. When used with the supplied Windows®-based configuration software, installation files can be saved and used to duplicate additional MLC 55 models. The files can also be archived for later use.

  • Extron's easy-to-use MLC 55,62,64 Series software - Provides fast and simple setup via USB when combined with one of many ready-to-use RS-232 or IR device drivers available on the Extron Web site. The configuration program and MLC 55 RS MK also support IR Learning for creating new IR drivers from the handheld remote of a source or display device.


  IR Emitter and Shield Kits IR Emitter Kits for Extron Products With IR Output
  USB CFG Cable USB A Male to USB Mini B Male Configuration Cable


Communication — host port
   USB host port USB mini B, front panel behind faceplate
   USB standards USB 2.0, low speed
   IR learning frequencies 30 kHz to 300 kHz
   IR learning distance 4" (10 cm) to 14" (36 cm) from the receiver
   Program control Extron MLC 55, 62 and 64 Series Configuration Program for Windows®
Extron Simple Instruction Set (SIS)
Communication — serial port
   Serial control port (1) 3.5 mm captive screw connector, 2 pole, ground pin shared with IR port, for unidirectional RS-232 control (±5 V)
   Baud rate and protocol (RS-232) 9600 (default), 19200, 38400, 57600, or 115,200 baud; 8 (default) or 7 data bits; 1 stop bit; no parity (default), or even or odd parity
Communication — IR port
   IR control port (1) 3.5 mm captive screw connector, 2 pole, ground pin shared with serial port (transmit only)
TTL level (0 to 5 V) modulated infrared control from 30 kHz up to 300 kHz
   Power supply External
Input: 100-240 VAC, 50-60 Hz
Output: 12 VDC, 0.5 A, 6 watts
   Power consumption 
      Device 1.1 watts, 12 VDC
      Device and power supply 1.5 watts, 100-240 VAC, 50-60 Hz
   Temperature/humidity Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, noncondensing
   Cooling Convection, no vents
   Thermal dissipation 
      Device 3.6 BTU/hr
      Device and power supply 4.9 BTU/hr
   Mounting Wall or furniture mount
Mount to a standard 1 gang electric MK type British standard external wall box (may not fit in some in-wall junction boxes).
      Mounting centers ​60 mm horizontal
   Enclosure type Plastic
   Enclosure dimensions 
      Faceplate 3.39" H x 3.39" W x 0.44" D
(8.60 cm H x 8.60 cm W x 1.11 cm D)
      Device 2.81" H x 1.76" W x 1.41" D
(7.14 cm H x 4.47 cm W x 3.58 cm D)
​Fits the opening in a standard 1-gang MK type external wall box.
(Depth includes connectors. Allow enough depth in the wall box for device plus cable clearance.)
   Product weight 0.26 lbs (0.1 kg)
   Regulatory compliance CE, C-tick, c-UL, UL , FCC Class A, ICES, VCCI Class A
Section 508 of the Rehabilitation Act (29 U.S.C. 794d)
   Product warranty 3 years parts and labor
   Everlast power supply warranty 7 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.
Shipping Dimensions and Weights
    Part # Height Width Depth Weight
    60-1390-23 3.0" (7.6 cm) 7.35" (18.7 cm) 10.45" (26.5 cm) 1.6 lbs (0.73 kg)


Application Diagram

Panel Drawing

Panel Drawing
© 2020 Extron. Specifications are subject to change without notice.