Panduit ATLONA OMEGA AT-OME-MH21-CP User manual

1
Installation Guide
AT-OME-MH21-CP
Omega 4K/UHD Two-Input Switcher
for HDMI and USB with USB Hub
AT-OME-MH21-CP
IMPORTANT: Visit https://www.atlona.com/product/AT-OME-MH21-CP for the
latest rmware updates and documentation.
Package Contents
1 x AT-OME-MH21-CP
1 x USB-C cable
1 x IR emitter cable
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 24 V / 5 A power supply
1 x IEC power cord
The Atlona AT-OME-MH21-CP 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-CP 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-CP 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. The USB-C port provides up to 60 watts of device charging capability for laptops and
mobile devices.

2
Installation Guide
AT-OME-MH21-CP
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 factory 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-CP on the
connected display.
INPUT
21
AT-OME-MH21-CP
DC 24VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21-CP
OMEGATM RESET SHOW IPINPUT
21
Panel Descriptions
Front
1 2 3 4
5
6

3
Installation Guide
AT-OME-MH21-CP
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.
INPUT
21
AT-OME-MH21-CP
DC 24VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21-CP
OMEGATM RESET SHOW IPINPUT
21
Panel Descriptions
Rear
1 2 3 4 5 6 7
NOTE: The USB-C port provides up to 60 watts of device charging capability
for laptops and mobile devices. The cable used for USB-C connection should
support at least USB 3.1 Gen. 1, 4K @ 60 Hz video, and 60 W of power delivery.
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-CP 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 24V
Connect the included locking 24 V DC power supply to this power receptacle.

4
Installation Guide
AT-OME-MH21-CP
The AT-OME-MH21-CP 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-CP.
GND
Side View Side View
+
GND
+
-
2 1
3
2 1
3
GND GND
-
+
Rear View Rear View
-
+
- + + -
- + + -

5
Installation Guide
AT-OME-MH21-CP
The AT-OME-MH21-CP 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-CP
INPUT
21
AT-OME-MH21-CP
DC 24VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21-CP
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-CP.
9. Connect the included 24 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-CP
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.
The AT-OME-MH21-CP 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.
PWR
IP MODE
DISPLAY
AT-OME-MH21-CP
OMEGA
TM
RESET SHOW IPINPUT
21
PWR
IP MODE
DISPLAY
AT-OME-MH21-CP
OMEGA
TM
RESET SHOW IPINPUT
21
PWR
IP MODE
DISPLAY
AT-OME-MH21-CP
OMEGA
TM
RESET SHOW IPINPUT
21
NOTE: Mounting brackets can also be inverted to mount the unit under a table
or other at surface.
Mounting Instructions
IMPORTANT: When mounting the AT-OME-MH21-CP, ensure the mounting
height does not exceed 2 meters (6.56 feet).

8
Installation Guide
AT-OME-MH21-CP
INPUT
21
AT-OME-MH21-CP
DC 24VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21-CP
OMEGATM RESET SHOW IPINPUT
21
INPUT
21
AT-OME-MH21-CP
DC 24VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21-CP
OMEGATM RESET SHOW IPINPUT
21
IP Conguration
1. Make sure the AT-OME-MH21-CP is powered
2. Press and hold the IP MODE button, on the rear of the unit, for approximately ve seconds.
The AT-OME-MH21-CP 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-CP 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 factory static IP mode.
The default static IP address is 192.168.1.254.
Switching the IP mode
IP MODE LED ashes Description
Two DHCP mode
Three Static IP 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. If set to static IP
mode, then the IP address will be set to 192.168.1.254, by default.
To display the IP address of the AT-OME-MH21-CP, 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
NOTE: If a static IP address is set using the web server, then changing the IP
mode through the front panel will toggle between DHCP mode and the assigned
static IP address in the web server.

9
Installation Guide
AT-OME-MH21-CP
Resetting to Factory-Defaults
To reset the AT-OME-MH21-CP 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.
Velocity™with Integrated AMS
Web Server
The AT-OME-MH21-CP includes a built-in web server, which allows easy management and con-
trol of all features. Follow the instructions below to access the web server.
1. Set the IP mode of the AT-OME-MH21-CP. Refer to IP Conguration (page 8) for more
information.
2. Connect an Ethernet cable from the LAN port on the AT-OME-MH21-CP to the Local Area
Network (LAN).
3. Connect an HDMI cable from the AT-OME-MH21-CP 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-CP Registration page will be displayed.
6. Enter the username, password, and conrm the password on the registration page to
register the device. The password must contain a minimum of 8 characters, including 1
uppercase, 1 lowercase, and 1 numeric character.
7. Click on Register button.
8. The AT-OME-MH21-CP Login page will be displayed.
9. Enter the username and password login credentials that were entered during the registration
process.
10. Click the Login button
INPUT
21
AT-OME-MH21-CP
DC 24VLANIR OUTRS-232HOST USBUSB HUB
L R
- -
+ + TXRX TX
OUTPUT
PWR
IP MODE
DISPLAY
AT-OME-MH21-CP
OMEGATM RESET SHOW IPINPUT
21
RESET button
For easy conguration of Atlona devices, Velocity with Integrated AMS 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 Velocity with Integrated AMS and go to the IP
address of Velocity with Integrated AMS. View the Velocity with Integrated AMS installation
instructions on how to nd the IP of the software, if necessary.
2. Enter the login information on the Velocity with Integrated AMS web page, then click the
Login button.
3. View the AT-OME-MH21-CP manual for routing and conguration information.

10
Installation Guide
AT-OME-MH21-CP
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 (2x) Flashes two times to indicate that the unit is being set to
DHCP mode. Refer to IP Conguration (page 8) for more
information.
Flashes green (3x) Flashes three times to indicate that the unit is being set
to factory static IP mode. The IP address will be set to
192.168.1.254, by default. Refer to IP Conguration (page 8)
for more information.
O Normal operating mode.

11
Installation Guide
AT-OME-MH21-CP
Notes

12
Installation Guide
AT-OME-MH21-CP
Version 1 25283-R1
®
The terms HDMI, HDMI High-Denition Multimedia Interface, and the HDMI Logo are trademarks or
registered trademarks of HDMI licensing Administrator, Inc.
© 2022 Atlona Inc. All rights reserved. “Atlona” and the Atlona logo are registered trademarks of Atlona Inc. All other brand names and trademarks or registered
trademarks are the property of their respective owners. Pricing, specications and availability subject to change without notice. Actual products, product images, and
online product images may vary from images shown here.
English Declaration of Conformity
The English version can be found under the resources tab at:
https://atlona.com/product/at-ome-mh21-cp/.
Warranty
Chinese Declaration of Conformity 中国RoHS合格声明
To view the product warranty, use the following link or QR code:
https://atlona.com/warranty/.
由SKU列出於:
https://atlona.com/about-us/china-rohs/.
US International
atlona.com •408.962.0515 •41.43.508.4321