LINK-MI LM-EX50S User manual

HDMI USB KVM Extender
LM-EX50S
User manual

Preface.....................................................................................................1
1. Cautions...............................................................................................2
2. About...................................................................................................3
3. Installation ...........................................................................................4
4. Operation instruction............................................................................5
5. Maintenance.........................................................................................6
6. Truble shooting ....................................................................................7

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Preface
Thanks for purchasing our HDMI USB KVM extender. Before using this
product, read this user manual carefully please. Follow the instruction to
keep your safety and avoid products damage.
This user manual might be modified irregularly because of updated
products. And the manual is for instruction only, we do not guarantee the
information and the suggestions.

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1. Cautions
■Logo and meaning
Careful, warning, dangerous, Pay attend to following items.
■Cautions
Do not use this product in the extreme hot, cold, dusty or humid
environments.
Prevent friction with hard objects.
Avoid the product falling down from a high place, or it may damage
the hardware.
The product is not water proofed. So do not get any liquid into the
unit please.
Do not dismantle, assemble or alter the product arbitrarily.
Warning
The CAT5e/6 cable can NOT be placed underground, outdoor,
and between buildings. It must be placed with extenders indoor.

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2. About
■Product model and standard
HDMI+USB KVM extender includes transmitter and receiver.
Transmitters combine HDMI video, audio and control signals, then
transmit them through single CAT5e cable. Receivers get these signals,
separate signals and rebuild video, audio and control ones, output through
HDMI interfaces. It supports USB HID mouse and keyboard, remote IR
(RX->TX) and bi-direction RS232 URAT. This product can achieve all
functions through single CAT5e cable. Extending distance is 50 meters
for 1080p 60Hz HD signal.
Products model:
Model
Number
Remote IR
Bi-directio
n RS232
USB
keyboard &
Mouse
Model A
Yes
Yes
Yes
Model B
Yes
No
No
■Main features:
Extending distance is 170ft(50 meters) at resolutions 1080P 3D or
1920x1200 60fs, and 270ft(80 meters) at 1080i/720P through single
CAT5e cable.
Support audio formats, Dolby True HD, DTS-master, etc.

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Support 3D signals (all 7 formats), such as Frame Packing,
Side-by-Side, Top-to-Bottom, etc.
Supports EDID call back.
Supports CEC pass through.
VESADDC and hot swap technology (HPD).
38Khz remote IR (RX->TX).
USB HID mouse and keyboard (RX->TX). Model Aonly.
Bi-direction RS232 UART communication. Model Aand C only.
Compatible with HDCP 1.2.
Compatible DVI 1.0.
Support cascade to enhance extending distance.
Industrial metal case, easy to install.
■Parameters:
Interface
Transmitte
rs
HDMI input, IR output (3.5mm), RJ45 Ethernet interface, USB output (female
type B), DB9 UART (male), 5V DC in
Receivers
HDMI output, IR input (3.5mm), RJ45 Ethernet interface, USB input (two male
type A), DB9 UART (male), 5V DC in
Power
<2.5W TX or <1.5W RX
Dimension
(L x W x H): 110 x 80 x 30mm
Net weight
0.2kg per unit
Video bandwidth
Maximum TMDS clock frequency 225MHz，6.75Gbps
Resolution and
distance
1080P 170ft (50 meters)-CAT5e/ 270ft (80 meters)-CAT6
720P/1080i 270ft (80 meters)-CAT5e/ 330ft (100 meters)-CAT6
Audio formats
8-channel, support Dolby TrueHD and DTS Master
TMDS input signal
1.2 volts (point to point)
DDC input signal
5 volts (point to point)
Indicator
Power-green, video link-yellow
HD interface
standard
HDMI 1.3 standard (HDMI 1.4 3D function), HDCP 1.2, support CEC, EDID

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UART data rate
Support 4800bps, 9600bps, 19200bps, 39400bps, 57600bps
Remote IR
38khz
USB interface
USB HID compatible devices, plug & play, no need to install software
Temperature
range
0 ~ 40°C (operation), -20~60°C(stock)
Compliance
FCC; CE; RoHS
■Product introduction
Transmitter：
○
1USB type-B, connect to PC
○
2RS232 DB9 interface
○
3HDMI input
○
4CAT5e/6 cable RJ45 port
○
5Remote IR output
○
6Power indicator
○
7Video link indicator
○
85V DC input
Receiver：
○1
○
2
○
5
○
7
○
8
○
3
○
6
○
4

6
○
1USB type-A, connect to mouse & keyboard
○
2RS232 DB9 interface
○
3HDMI output
○
4CAT5e/6 cable RJ45 port
○
5Remote IR input
○
6Power indicator
○
7Video link indicator
○
85V DC input
■Packing list
1 unit transmitter, 1 unit receiver (x means B, C or D).
1 remote IR blaster (with 30cm cable）, 1 IR receiver (with 30cm
cable).
4 type-L metal brackets, used for install on walls.
2 units of DC 5V 1Aadapter.
1 USB type-Ato type-B cable (Model Aonly).
245*265*70mm carton packing.
○
5
○
7
○
1
○
2
○
3
○
4
○
6
○
8

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3. Installation
■Installation details and cautions
Before installation
a) Prepare place for installing system. The transmitter should be
close to video sources, and the receiver should be close to display
terminals. The HDMI cables should be both less than 1.5 meters.
b) Basing on real request, make CAT5e/6 cables for connecting the
transmitter and the receiver. The length can NOT be more than
distance of parameters.
c) CAT5e/6 cables should be far away from electromagnetic
disturbance sources. Such as AC motors, electro soldering,
fluorescents, microwave ovens, etc. These disturbance sources
might affect extending distance or video quality.
d) Ensure the length of cable is suitable, no external tensions.
e) Ensure reliable AC plug base.
Typical installation instruction
Connect the PC and HD monitors to extend video, mouse and
keyboard:

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Connect a player and a HDTV:
Transmitter side connection
a) Connect your PC or Player and HDMI IN port of transmitter with
HDMI cable (HDMI cables are not included in this product).
b) Connect PC and transmitter using USB type-A to type-B cable.
Type-Aport connects PC, type-B port connects transmitter. (Model
A only)
c) Using standard RS232 cable connects PC or other equipment to

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transmitters DB9 port. (Model Aand C only)
d) Inset IR blaster cable to extender TX IR OUT port. IR blaster
should be close to your player or other controlled equipment.
e) Inset CAT5e/6 cable to CAT5e/6 port.
f) Connect power adapter.
Receiver side connection
a) Connect your HDTV and HDMI OUT port of receiver with HDMI
cable (HDMI cables are not included in this product).
b) Connect mouse and keyboard to receiver USB ports separately.
(Model Aonly)
c) Using standard RS232 cable connects external equipment to
receiver DB9 port. (ModelAand C only)
d) Inset IR receiving cable to extender RX IR IN port. IR receiver
should be face outside for easy operation.
e) Inset CAT5e/6 cable to CAT5e/6 port.
f) Connect power adapter.
Install products on walls or frames
There are type-L metal brackets. It is easy to fix transmitters or
receivers on walls.
a) Fix two metal hangers with screws.

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b) Makes holes with hand drill on walls, place rubber keeper into the
holes. For frame installation, no need for this step.
c) Fix products on walls or frames with screws.

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4. Operation instruction
■Getting started
After finishing all steps above, system is workable, follow below
steps.
a) Ensure the video source and the display terminal are power on.
b) Ensure all input, output cables are connects.
c) Inset TX and RX power adapters into power plug bases.
d) Green power indicator will light.
e) It takes about 2~3 seconds to finish EDID and other initialization
automatically.
f) Transmitter video indicator will light; it means input video signal
is OK. Then receiver video indicator will light, it means output
video signal is OK.
g) At this time, display terminal will show the same format video that
video source send out.
■Remote IR function
Using video source’s (such as Blue-ray DVD) IR controller faces
extender RX side IR receiver. IR signal will be transmitted to extender
TX side IR output port, to control video source directly.

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■Bi-direction RS232 function
Bi-direction RS232 Baud rate configuration
Refer to user manual, HDMI USB KVM Cat5e/6 Extender Model A
and C support bi-direction RS232 communication, and the default data
rate is set to 57600bps. In case of avoiding some potential misconfigured
user data input.
a) Power on RX unit, you will find similar output at your serial port
debug software as below screenshot.
b) Select the data rate you want to set. Select (1-6) to set the different

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baud rate and the system will stop 5 second to wait for your input,
like below figure ( select ‘3’, and the system baud rate will be
19200bps.
图2
c) After you send out (1-6), and the system will print a prompt of “Are
you select **?(Y/N)”, and you have 5 second time the select yes or
no. According your input, the system will go on with below 3
possibilities:
1) If you input ‘Y’or ‘y’, that means you confirm the current 1-6
selection, and system will execute new baud rate right now. And
the window will print “The select baud rate is ***”, like below

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screenshot.
2) If you input ‘N’or ‘n’，the system will reload the ‘Set Uart
Baud’menu.
3) If input any other symbols, the system will automatically
execute the old baud rate before last power off.
d) The system will print ‘UART START’5 seconds later, that means
bi-direction RS232 is ready for the normal status. Then you need set
your DTU or PC UART baud rate according new selection.
e) No need to set baud rate on TX side. TX will get baud rate
information from RX when system is working.

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■USB HID mouse and keyboard function pass back function
Model A supports USB HID mouse and keyboard pass back function.
To use this function, PC system must be Windows XP or upper version.
In Windows system, USB HID devices are plug and play, no need drivers.
Model Atransmitter unit has USB type-B connector, receiver unit has two
USB type-A connectors, one is for mouse, and the other one is for
keyboard. When extender system is installed, if receiver side mouse and
keyboard can control transmitter side PC, it means mouse and keyboard
function is workable.
■EDID call back function
Products support EDID call back function. Receiver unit will read
EDID from display terminal, and then pass this EDID information to
transmitter unit. The transmitter unit will update internal NVRAM to save
new EDID information, and inform video source to read updated EDID
information. This function is automatic, no need to setup by customers.
This function is to keep maximum compatibility.
■CEC pass through function
Products support CEC pass through function. When the system is
powered on, CEC pass through is built automatically.

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■How to make Cat5e/6 cable
Products request normal CAT5e or CAT6 Ethernet cables, which
must meet standard-TIA/EIA-568B, refer to below pin definition.

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5. Maintenance
■Storage conditions
Products storage temperature should be -20°C ~60°C. For long time
storage requirement, please use original carbon boxes, and avoid from
high humid, acid base or dusty place.
■Maintenance
Warning
To ensure your safety, place choose original adapters. And provide
stable AC input according to this manual.