Panduit ATLONA Omega AT-OME-MH21 User manual

1
Installation Guide
AT-OME-MH21
Omega 4K/UHD Two-Input Switcher
for HDMI and USB with USB Hub
AT-OME-MH21
The Atlona AT-OME-MH21 is a compact, versatile switcher with HDMI and USB-C inputs. It is
equipped with features for complete AV integration in huddle rooms and small meeting spaces,
including automatic switching and display control, audio de-embedding, and a USB 3.0 hub
for video conferencing peripherals or touch displays. Part of the Omega™ Series of integration
products for modern AV communications and collaboration, the OME-MH21 is HDCP 2.2
compliant and supports 4K HDR and 4K/60 4:4:4 at HDMI data rates up to 18 Gbps. Additionally,
4K downscaling to 1080p @ 60, 30, or 24 Hz is available when connected to an HD display.
The OME-MH21 includes USB 3.0 and USB-C interfaces for two host PCs, plus two peripheral
devices such as a camera, microphone, speakerphone, touch-enabled display, or keyboard and
mouse.
IMPORTANT: Visit http://www.atlona.com/product/AT-OME-MH21 for the latest rm-
ware updates and documentation.
Package Contents
1 x AT-OME-MH21
1 x USB-C cable
1 x IR emitter
1 x 5-pin captive screw connector
1 x 4-pin captive screw connector
2 x Mounting brackets
4 x Mounting screws
4 x Rubber feet
1 x 5 V DC power supply
1 x IEC power cord
1 x Installation Guide

2
Installation Guide
AT-OME-MH21
1 PWR
This LED indicator glows solid green when the unit is powered.
2 DISPLAY
Press and release this button to toggle power on the connected display.
3 INPUT
Press and release this button to toggle between the HDMI and USB-C input. A solid green
LED indicator will display the currently active input. Each LED indicator corresponds to the
input on the rear panel of the unit.
4 IP MODE
Press and release this button, next to the green LED indicator, to switch the IP mode
between DHCP and static IP modes. The LED indicator will provide the current IP mode.
Refer to IP Conguration (page 8) for more information.
5 RESET
Press and release this button to reset the unit to factory-default settings. Refer to Resetting
to Factory-Defaults (page 9) for more information.
6 SHOW IP
Press and release this button to display the IP address of the AT-OME-MH21 on the
connected display.
INPUT
21
AT-OME-MH21
DC 5VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21
OMEGATM RESET SHOW IPINPUT
21
Panel Descriptions
Front
1 2 3 4
5
6

3
Installation Guide
AT-OME-MH21
1 INPUT
Connect a USB-C source to the USB-C port. Connect an HDMI cable from the HDMI port
to a UHD/HD source.
2 OUTPUT
Connect an HDMI cable from the HDMI output to a display or other sink device. Connect
an audio output device to this port using the included 5-pin captive screw block. Refer to
Audio Output Connector (page 4) for wiring information.
3 USB HUB
Connect a USB device to each of these ports.
4 HOST USB
Connect to a computer using a USB-B to USB-A cable.
5 RS-232 / IR OUT
Connect the included 4-pin captive screw block to this receptacle. The RS-232 port
provides RS-232 control for the AT-OME-MH21 and the connected display. Refer to RS-232
and IR (page 5) for more information.
6 LAN
Connect an Ethernet cable to this port to control the unit and/or to pass Ethernet to a local
device.
7 DC 5V
Connect the included locking 5 V DC power supply to this power receptacle.
INPUT
21
AT-OME-MH21
DC 5VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21
OMEGATM RESET SHOW IPINPUT
21
Panel Descriptions
Rear
1 2 3 4 5 6 7

4
Installation Guide
AT-OME-MH21
The AT-OME-MH21 provides two-channel LPCM audio de-embedding of the source device,
using a dedicated audio output port.
Audio Output Connector
Unbalanced
Balanced
1. Use wire strippers to remove a portion of the cable jacket.
2. Remove at least 3/16” (5 mm) of insulation from each of the wires.
3. Insert the wires into the correct terminals using the included 5-pin captive screw connector.
4. Attach the 5-pin connector block to the OUTPUT audio port on the AT-OME-MH21.
GND
Side View Side View
+
GND
+
-
2 1
3
2 1
3
GND GND
-
+
Rear View Rear View
-
+
- + + -
- + + -

5
Installation Guide
AT-OME-MH21
The AT-OME-MH21 provides control using RS-232 and/or IR. This step is optional.
1. Use wire strippers to remove a portion of the cable jacket.
2. Remove at least 3/16” (5 mm) from the insulation of the RX, TX, and GND wires for the RS-
232 connection.
3. Insert the TX, RX, and GND wires into correct terminal using one of the included 4-pin
captive screw connectors.
4. Repeat step 2 for the S and GND wires for the IR connection.
5. Insert the S (signal) wire in to the TX terminal and the ground wire to the GND terminal.
6. Tighten the captive screws to secure the wires in place. Do not over-tighten or use high-
torque devices to prevent damage to the connector block.
NOTE: Typical DB9 connectors use pin 2 for TX, pin 3 for RX, and pin 5 for
ground. On some devices functions of pins 2 and 3 are reversed. Note that the
signal (S) pin for the IR is labeled as “TX” on the port.
GND
to control system
or IR emitter
DE-9 (RS-232) port
RX
TX
S
GND
RS-232 and IR
RX TX TX

6
Installation Guide
AT-OME-MH21
INPUT
21
AT-OME-MH21
DC 5VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21
OMEGATM RESET SHOW IPINPUT
21
1. Connect a USB-C device to the INPUT 1 port.
2. Connect an HDMI cable from the INPUT 2 port to a UHD/HD source device.
3. Connect an HDMI cable from the HDMI OUTPUT port to a display device.
4. OPTIONAL: Connect an audio output device to this port using the included captive screw
block. Refer to Audio Output Connector (page 4) for wiring information.
5. Connect up to two USB devices to the USB HUB ports.
6. Connect a computer to the HOST USB port, using a USB-A to USB-B cable.
7. OPTIONAL: Connect a serial cable from RS-232 port to a display device. Refer to RS-232
and IR (page 5) for wiring information. Connect an IR emitter to the IR OUT port.
8. Connect an Ethernet cable to the LAN port to control the AT-OME-MH21.
9. Connect the included 5 V DC power supply from this receptacle to an available AC outlet.
Installation
4 6 7 8 91 2 3 5

7
Installation Guide
AT-OME-MH21
The AT-OME-MH21 includes two mounting
brackets, which can be used to attach the unit
to any at surface. Use the two enclosure
screws, on the sides of the unit to attach the
mounting brackets.
1. Using a small Phillips screwdriver, remove
the two screws from the left side of the
enclosure.
2. Position one of the mounting brackets, as
shown below, aligning the holes on the
side of the enclosure with one set of holes
on the mounting bracket.
3. Use the screws from Step 1 to attach the
mounting bracket.
4. Repeat steps 1 and 2 to attach the
second mounting bracket to the opposite
side of the unit.
5. Mount the unit to a at surface using the
oval-shaped holes, on each mounting
bracket. If using a drywall surface, a #6
drywall screw is recommended.
OMEGA
TM
PWR
LINK
FW
1
2
3
INPUT TEST
AT-OME-ST31
OMEGA
TM
PWR
LINK
FW
1
2
3
INPUT TEST
AT-OME-ST31
OMEGA
TM
PWR
LINK
FW
1
2
3
INPUT TEST
AT-OME-ST31
NOTE: Mounting brackets can
also be inverted to mount the
unit under a table or other at
surface.
Mounting Instructions

8
Installation Guide
AT-OME-MH21
INPUT
21
AT-OME-MH21
DC 5VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21
OMEGATM RESET SHOW IPINPUT
21
INPUT
21
AT-OME-MH21
DC 5VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21
OMEGATM RESET SHOW IPINPUT
21
IP Conguration
1. Make sure the AT-OME-MH21 is powered
2. Press and hold the IP MODE button, on the rear of the unit, for approximately ve seconds.
The AT-OME-MH21 is shipped with DHCP enabled. Once connected to a network, the DHCP
server (if available), will automatically assign an IP address to the unit. If the AT-OME-MH21
is unable to detect a DHCP server within 15 seconds, then the unit will use a self-assigned IP
address within the range of 169.254.xxx.xxx.
Use an IP scanner, along with the MAC address on the bottom of the unit, to identify the unit on
the network. If a static IP address is desired, the unit can be switched to static IP mode.
The default static IP address is 192.168.1.254.
Switching the IP mode
IP MODE LED ashes Description
Two Factory Static IP mode (IP address set to 192.168.1.254)
Four DHCP mode
3. Release the button once the LED indicator, next to the IP MODE button, begins to ash
green. The number of ashes will indicate the currently selected IP mode.
To display the IP address of the AT-OME-MH21, on the connected display, press and release the
SHOW IP button on the front panel.
Displaying the IP Address
IP MODE button
SHOW IP button

9
Installation Guide
AT-OME-MH21
Resetting to Factory-Defaults
To reset the AT-OME-MH21 to factory-default settings, press and hold the RESET button for
approximately 5 seconds. Release the button when the RESET LED indicator begins to ash.
The LED indicator will ash three times to indicate that the reset procedure has completed.
AMS 2.0
Web Server
The AT-OME-MH21 includes a built-in web server, which allows easy management and control of
all features. Follow the instructions below to access the web server.
1. Set the IP mode of the AT-OME-MH21. Refer to IP Conguration (page 8) for more
information.
2. Connect an Ethernet cable from the LAN port on the AT-OME-MH21 to the Local Area
Network (LAN).
3. Connect an HDMI cable from the AT-OME-MH21 to a display, then press the SHOW IP
button on the front panel to display the IP address.
4. Launch a web browser and enter the IP address of the unit.
5. The AT-OME-MH21 Login page will be displayed.
6. Enter the following information on the Login page. Login credentials are case-sensitive.
Login: admin
Password: Atlona
7. Click the Login button.
INPUT
21
AT-OME-MH21
DC 5VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21
OMEGATM RESET SHOW IPINPUT
21
RESET button
For easy conguration of Atlona devices, AMS 2.0 is available from https://atlona.com/AMS for
free. Once AMS has been setup, following the instructions below.
1. Open a browser on the same network as AMS 2.0 and go to the IP of AMS 2.0. View the
AMS 2.0 installation instructions on how to nd the IP of the software, if necessary.
2. Enter the login information on the AMS 2.0 web page, then click the Login button.
3. View the AT-OME-MH21 manual for routing and conguration information.

10
Installation Guide
AT-OME-MH21
Front Panel LED Indicators
The LED indicators on both the front and rear of the unit provide basic information on the current
status of the unit.
PWR Description
Solid green Unit is receiving power using the optional 24 V DC power
supply.
O Unit is not powered.
1, 2 Description
Solid green The input is the currently selected input.
O The input is not selected.
IP MODE Description
Flashes green (4x) Flashes four times to indicate that the unit is being set to
DHCP mode. Refer to IP Conguration (page 8) for more
information.
Flashes green (2x) Flashes four times to indicate that the unit is being set to
DHCP mode. Refer to IP Conguration (page 8) for more
information.
O Normal operating mode.

11
Installation Guide
AT-OME-MH21
Notes

12
Installation Guide
AT-OME-MH21
Version 3
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