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Control connection
f
RS-232/MLC/IR control port —You can control the MLS switcher via an
RS-232 connection directly from a host computer, a control system, or a
MediaLink Controller (MLC). Alternatively, you can use IR remote control
via an Extron IR Link connected to this port.
Connect a cable between this port and an optional
Extron MLC MediaLink Controller or an optional
IR Link IR signal repeater.
• The MLC provides remote control of input switching
and volume.
• The IR Link accepts modulated IR signals
from a remote control so the remote control
can be used for selecting the switcher's
inputs.
Extron Comm-Link cable is recommended
for this connection. If you use Comm-Link
cable, the switcher and controller (MLC) can be up to 250 feet (76.2 m) apart.
Wire the captive screw connector for connection to an IR Link, an MLC, or a
computer or control system as shown in the following four diagrams.
RS-232_MLC-IR port wiring_MLS304_062404.eps
RS-232
MLC/IR
Tx Rx IR
12V
+
MediaLink
Switcher
rear panel
A B C
RS-232/MLC/IR port
+12 VDC
Ground ( )
C
IR (IR Link)
150 feet (45.7 m) maximum
MediaLink Switcher to an IR Link
RS-232
MLC/IR
MediaLink
Switcher
Tx Rx IR
12 V
+
rear panel
RS-232/MLC/IR port
A B C
NOTE
+12 VDC
Ground ( )
B Receive (Rx)
A
Transmit (Tx)
250 feet (76.2 m) maximum
NOTE
If you use cable that has a
drain wire, tie the drain wire
to ground at both ends.
MediaLink Switcher to an MLC
RS-232
MLC/IR
MediaLink
Tx Rx IR
12V
+
Switcher
rear panel
RS-232/MLC/IR port
A B C
NOTE
If using an external power
supply (instead of the MLS) to
power the MLC, you must
connect a ground wire
between the MLC and MLS.
Ground ( )
B Receive (Rx)
Transmit (Tx)
A
Transmit (Tx)
Receive (Rx)
A B C D E
IR Link
port
IR
D
The switcher provides up to 12 VDC, 0.40 A power to an MLC 206.
Other MLC models may draw more current than the MLS can provide.
Extron recommends using a separate power supply for the MLC.
+12 VDC
Ground ( )
B
Transmit (Tx)
Receive (Rx)
A
MLC
MLS/Power
port
A B
MLS / Power
MediaLink Switcher Rear Panel
MLS 304 Series, MLS 406 Series • Installation
B
Ground ( )
A
+12 VDC input
Transmit (Tx)
Receive (Rx)
Sleeve(s)
Ground ( )
+12 V, 0.4 A power output
MediaLink Switcher Rear Panel
MLA-Remote
MediaLink Switcher Rear Panel
MediaLink
Controller
(MLC)
RS-232
MLC/IR
Tx Rx IR
12V
+
A B C
MediaLink
Controller
Power Supply
(MLC)
Tx Rx IR
12V
A B C
RS-232/MLC/IR
RS-232
MLC/IR
Tx Rx IR
+
12V
A B C
SIGNAL
IR Link
RS-232
MLC/IR
Tx Rx IR
+
12V
A B C
External
2-
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