Crestron QM-MDM3X1
3 x 1 QuickMedia™ Mini-Switcher
Operations & Installation Guide
This document was prepared and written by the Technical Documentation department at:
Crestron Electronics, Inc.
15 Volvo Drive
Rockleigh, NJ 07647
1-888-CRESTRON
All brand names, product names and trademarks are the property of their respective owners.
©2007 Crestron Electronics, Inc.
Crestron QM-MDM3X1 3 x 1 QuickMedia™ Mini-Switcher
Contents
3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 1
Introduction ...............................................................................................................................1
Features and Functions................................................................................................ 2
Applications.................................................................................................................2
Specifications ..............................................................................................................3
Physical Description.................................................................................................... 5
Industry Compliance ...................................................................................................7
Setup .......................................................................................................................................... 8
Network Wiring........................................................................................................... 8
QuickMedia Wiring..................................................................................................... 8
Identity Code ............................................................................................................... 9
Installation................................................................................................................. 10
Hardware Hookup .....................................................................................................13
Programming Software............................................................................................................14
Earliest Version Software Requirements for the PC .................................................14
Programming with Crestron SystemBuilder.............................................................. 14
Programming with SIMPL Windows........................................................................ 14
Example Program...................................................................................................... 16
Uploading and Upgrading........................................................................................................ 17
Establishing Communication.....................................................................................17
Programs and Firmware ............................................................................................17
Program Checks ........................................................................................................18
Problem Solving ......................................................................................................................19
Troubleshooting......................................................................................................... 19
Check Network Wiring..............................................................................................19
Reference Documents................................................................................................20
Further Inquiries........................................................................................................20
Future Updates ..........................................................................................................21
Return and Warranty Policies.................................................................................................. 22
Merchandise Returns / Repair Service ......................................................................22
CRESTRON Limited Warranty.................................................................................22
Operations & Installation Guide – DOC. 6608A Contents • i
Crestron QM-MDM3X1 3 x 1 QuickMedia™ Mini-Switcher
3 x 1 QuickMedia™
Mini-Switcher: QM-MDM3X1
Introduction
The QM-MDM3X1 is a compact 3 x 1 QuickMedia™ switcher designed to expand
the input capacity of a single QM-RMCRX-BA receiver or any device with a
QuickMedia (QM) input port. It attaches directly to the top of a QM-RMCRX-BA,
providing inputs for up to three QuickMedia Wall Plates, FlipTop Boxes and other
QM transmitters. It can also be installed beneath a table or in a closet to provide
localized switching of any three QM sources.
The QM-MDM3X1 behaves as a midpoint QM device just like any other QM
switcher. All signal routing is provided over inexpensive CAT5e type cable via
Crestron’s exclusive QuickMedia transport, supporting the distribution of high
resolution RGB, video, stereo audio and microphone signals up to a total of 450 feet
(137 meters) end to end. Up to two QM-MDM3X1s or other QuickMedia switchers,
distribution centers and distribution amplifiers may be cascaded in a given
QuickMedia signal path to support larger system configurations.
Regardless of the configuration, complete system operation can be made transparent
to the end user with all signal routing occurring smoothly under the command of the
MediaManager control system. Audio breakaway capability allows audio signals to
be selected independent of video signals.
®
Four built-in Cresnet
power. The QM-MDM3X1 can furnish up to 41 Watts of Cresnet power when
powered by a dedicated PW-2420RU power supply (sold separately) or 16 Watts if
powered by a PW-2410RU (sold separately). The QM-MDM3X1 may also be
powered from any 2-Series control system or Cresnet power supply via the Cresnet
network.
ports provide for distribution of Cresnet control signals and
NOTE: For QuickMedia wiring use CresCAT-QM, CresCAT-IM or quality
CAT5e/CAT6 cable with a maximum delay skew of 15 ns per 100 m. The maximum
aggregate cable length and delay skew between any QM transmitter (origination
point) and QM receiver (endpoint) is 450 feet (137 meters) and 22 ns. A maximum
of two QM midpoint devices may be inserted into a given QM signal path.
Exceptions apply; refer to each respective product manual for details.
Operations & Installation Guide – DOC. 6608A 3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 • 1
3 x 1 QuickMedia™ Mini-Switcher Crestron QM-MDM3X1
Features and Functions
• Compact 3 x1 QuickMedia™ switcher
• Provides easy input expansion for any QM receiver
• Mounts directly to pole mounted QM-RMCRX-BA
• Low profile design allows installation in furniture or closet
• Built-in Cresnet
• Audio breakaway capability
®
power distribution
Applications Applications
The following diagrams show a QM-MDM3X1 in a lecture hall and a business
The following diagrams show a QM-MDM3X1 in a lecture hall and a business
application.
application.
QM-MDM3X1 in a Lecture Hall Application QM-MDM3X1 in a Lecture Hall Application
2 • 3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 Operations & Installation Guide – DOC. 6608A
Crestron QM-MDM3X1 3 x 1 QuickMedia™ Mini-Switcher
QM-MDM3X1 in a Business Application
Specifications
Specifications for the QM-MDM3X1 are listed in the following table.
QM-MDM3X1 Specifications
SPECIFICATION DETAILS
Video/RGB
Switcher
Gain 0 dB
Audio
Switcher
Gain 0 dB
Power
Power Consumption 9 Watts (0.375 Amps) @ 24 Volts DC
Recommended Power Supply
(Continued on following page)
3 x 1 selector switch; routes any of (3) QM
video input signals to (1) QM output
3 x 1 selector switch; routes any of (3) QM
audio input signals to (1) QM output
PW-2410RU or PW-2420RU (sold
separately)
Operations & Installation Guide – DOC. 6608A 3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 • 3
3 x 1 QuickMedia™ Mini-Switcher Crestron QM-MDM3X1
QM-MDM3X1 Specifications (Continued)
SPECIFICATION DETAILS
Power (Continued)
Available Cresnet Power
Cresnet Power Usage
Default Net ID 32
Minimum 2-Series Control
System Update File
Environmental
Temperature 32º to 104ºF (0º to 40ºC)
Humidity 10% to 90% RH (non-condensing)
Heat Dissipation 50 BTU/Hr
Enclosure
Chassis
Mounting
Dimensions
Height 1.17 in (2.96 cm)
Width 7.69 in (19.52 cm)
Depth 5.24 in (13.30 cm)
Weight 1.74 lbs (0.79 kg)
1. The latest software versions can be obtained from the Crestron website. Refer to the NOTE following
these footnotes.
2. Crestron 2-Series control systems include the AV2 and PRO2. Consult the latest Crestron Product
Catalog for a complete list of 2-Series control systems.
1, 2
16 Watts using PW-2410RU or
41 Watts using PW-2420RU
9 Watts (0.375 Amps) @ 24 Volts DC with
no power supply connected to the 24 VDC
connector
Version 3.137 or later
Steel, black matte powder coat finish,
convection cooled, vented top and sides
with allowance for proper ventilation of
attached QM-RMCRX-BA
Freestanding, surface mount or attachment
to top of QM-RMCRX-BA (adhesive feet,
(4) “L” brackets and (4) strap brackets
included)
NOTE: Crestron software and any files on the website are for authorized Crestron
dealers and Crestron Authorized Independent Programmers (CAIP) only. New users
may be required to register to obtain access to certain areas of the site (including the
FTP site).
4 • 3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 Operations & Installation Guide – DOC. 6608A
Crestron QM-MDM3X1 3 x 1 QuickMedia™ Mini-Switcher
Physical Description
This section provides information on the connections, controls and indicators
available on your QM-MDM3X1.
QM-MDM3X1 Physical View (Front)
QM-MDM3X1 Physical View (Rear)
QM-MDM3X1 Overall Dimensions (Front View)
QM-MDM3X1 Overall Dimensions (Top View)
1.17 in
(2.96 cm)
5.24 in
(13.30 cm)
7.69 in
(19.52 cm)
Operations & Installation Guide – DOC. 6608A 3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 • 5
3 x 1 QuickMedia™ Mini-Switcher Crestron QM-MDM3X1
QM-MDM3X1 (Rear View)
1 2
Connectors, Controls & Indicators
#
1
2
3
4
CONNECTORS1,
CONTROLS &
INDICATORS
QM IN (1 – 3)
QM OUT
SETUP
(button and LED)
G
3
5
4
6
8
7
DESCRIPTION
(3) 8-wire RJ-45 female QuickMedia input
ports;
Connect to QM output ports of up to (3) QM
transmitters or other QuickMedia devices via
CresCAT-QM cable.
(1) 8-wire RJ-45 female QuickMedia output
port;
Connects to QM input port of QM-RMCRXBA or other QuickMedia device via
CresCAT-QM cable.2
(1) Miniature pushbutton and red LED, used
for touch-settable ID (TSID)
Used for setting network ID during initial
configuration or when the device is being
added/replaced.
(1) 6-32 screw, chassis ground lug.
2, 3
4
NET
5
6 PWR LED
7 NET LED
8
6 • 3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 Operations & Installation Guide – DOC. 6608A
24 VDC4
Four-position terminal block connector for
data and power. Connects to Cresnet control
network;
Normally provides Cresnet distribution
between QM-RMCRX-BA master port and
(3) QM transmitters.
Pin 1 (24) Power (24 Volts DC)
Pin 2 (Y) Data
Pin 3 (Z) Data
Pin 4 (G) Ground
(1) Green LED, indicates 24 Volts DC power
supplied from external power supply or
Cresnet control network.
(1) Yellow LED, indicates communication
with Cresnet system.
(1) 2.1 mm barrel DC power jack,
24 Volt DC power input;
(power supply sold separately);
Passes through to NET ports to power
additional Cresnet devices.
Crestron QM-MDM3X1 3 x 1 QuickMedia™ Mini-Switcher
1. Interface connectors for NET ports are provided with the unit.
2. For QuickMedia wiring use CresCAT-QM, CresCAT-IM or quality CAT5e/CAT6 cable with a
maximum delay skew of 15 ns per 100 m. The maximum aggregate cable length and delay skew
between any QM transmitter (origination point) and QM receiver (endpoint) is 450 feet (137 meters)
and 22 ns. A maximum of two QM midpoint devices may be inserted into a given QM signal path.
Exceptions apply; refer to each respective product manual for details.
3. The eight-pin RJ-45 QuickMedia transport port accepts CAT5E/CAT6 carrying audio, video and
microphone signals. The QM input port conforms to the 568B wiring standard. Refer to the following
table for connector pinouts.
RJ-45 PIN
NUMBER
1 WHITE/ORANGE
2 ORANGE
3 WHITE/GREEN
4 BLUE
5 WHITE/BLUE
6 GREEN
7 WHITE/BROWN
8 BROWN
4. The QM-MDM3X1 can be powered via the 24 VDC jack or the NET port. Crestron recommends
using one or the other but not both. Be sure to use a Crestron approved power supply as another may
cause damage.
WIRE COLORS
(EIA 568B)
QM ASSIGNMENT: RGB
- RGB RED
+ RGB RED
- RGB GREEN
+ DIGITAL AUDIO
- DIGITAL AUDIO
+ RGB GREEN
- RGB BLUE
+ RGB BLUE
QM ASSIGNMENT:
COMPOSITE, S-VIDEO,
COMPONENT AND AUDIO
- CHROMINANCE (- Pr)
+ CHROMINANCE (+ Pr)
- LUMINANCE (- Y)
+ DIGITAL AUDIO
- DIGITAL AUDIO
+ LUMINANCE (+ Y)
- COMPOSITE (- Pb)
+ COMPOSITE (+ Pb)
Industry Compliance
As of the date of manufacture, the QM-MDM3X1 has been tested and found to
comply with specifications for CE marking and standards per EMC and
Radiocommunications Compliance Labelling.
NOTE: This device complies with part 15 of the FCC rules. Operation is subject to
the following two conditions: (1) this device may not cause harmful interference and
(2) this device must accept any interference received, including interference that may
cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy
and if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Operations & Installation Guide – DOC. 6608A 3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 • 7
3 x 1 QuickMedia™ Mini-Switcher Crestron QM-MDM3X1
Setup
Network Wiring
When wiring the network, consider the following:
• Use Crestron Certified Wire.
• Use Crestron power supplies for Crestron equipment.
• Provide sufficient power to the system.
CAUTION: Insufficient power can lead to unpredictable results or damage
to the equipment. Please use the Crestron Power Calculator to help calculate
how much power is needed for the system (www.crestron.com/calculators
• For larger networks, use a Cresnet Hub/Repeater (CNXHUB) to maintain
signal quality.
For more details, refer to “Check Network Wiring” on page 19.
).
QuickMedia Wiring
The Crestron QuickMedia cable (sold under the name “CresCAT-QM”) contains one
CAT5E cable and one Cresnet cable in Siamese jackets. Installation of any QM
device is as simple as installing CresCAT-QM wires from the output of one device to
the input of another. Installations are flexible, affordable and fast. For more
information, refer to the latest revision of the Crestron MediaManager Applications
Guide (Doc. 6244), which is available for download from the Crestron website
(www.crestron.com/manuals
CresCAT-QM Cable
CresCAT-QM
Cable
).
NOTE: Do not untwist the two wires in a single pair for more than 1/3-1/2”
(0.84-1.27 cm) when making a connection. The twists are critical to canceling out
interference between the wires.
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Crestron QM-MDM3X1 3 x 1 QuickMedia™ Mini-Switcher
The aggregate cable length of a signal path originating at a QM transmitter and
terminating at a QM receiver (with a QM-MDM3X1 in between) must not exceed
450 feet (137 meters). Video signals may experience a loss of quality over very long
lengths of cable. This phenomenon is due to the added resistance and capacitance of
longer cable lengths and is not peculiar to either Crestron and/or QuickMedia
systems. To ensure sufficient bandwidth, the maximum aggregate cable length
should not exceed 450 feet. The use of lower-resolution signals may allow increased
cable length but must be tested by the installer with the sources to be used. The QM
pin assignment is based on the EIA/TIA 568B RJ-45 Jack standard. Check your
specific device, some (those without delay skew compensation) can use only 300 feet
(90 meters) or less based upon resolution.
NOTE: When transmitting S-video, luminance uses the green video pathway and
chrominance uses the red video pathway. When transmitting composite video, the
signal is carried on the blue video pathway.
NOTE: When using CresCAT-QM wiring, four additional wires are included for
making Cresnet connections.
When connecting multiple QM devices, the route between a QM origination point
(transmitter) and a QM endpoint (receiver) cannot have more than two midpoints
(e.g. QM-MDM3X1 or other QM switchers). Refer to the following diagram when
configuring a QM network.
NOTE: The aggregate length from transmitter to receiver cannot have a delay skew
of more than 22 ns.
QM Network Topology
Origination Points Endpoint
QM
QM-TX
QM
QM-FTDC
QM-WMC
Midpoints
QM
QM
QM
QM-MDM3x1QM-MD7x2
TPS-12G/15G-QM-L
Identity Code
The Net ID of the QM-MDM3X1 has been factory set to 32. The Net IDs of multiple
QM-MDM3X1 devices in the same system must be unique. Net IDs are changed
from a personal computer (PC) via the Crestron Toolbox (refer to “Establishing
Communication” on page 17).
When setting the Net ID, consider the following:
• The Net ID of each unit must match an ID code specified in the SIMPL™
Windows
®
program.
• Each network device must have a unique Net ID.
For more details, refer to the Crestron Toolbox help file.
Operations & Installation Guide – DOC. 6608A 3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 • 9
3 x 1 QuickMedia™ Mini-Switcher Crestron QM-MDM3X1
Installation
The QM-MDM3X1 is designed to mount directly on top of a QM-RMCRX-BA (sold
separately) or to the underside of a horizontal surface such as a desktop. It can also
be used freestanding.
Tools required:
• Phillips screwdriver
• Drill/driver (for underside mounting only)
Supplied Hardware for the QM-MDM3X1
DESCRIPTION PART NUMBER QUANTITY
Attaching to QM-RMCRX-BA
Mounting bracket
(for attachment to QM-RMCRX-BA)
Mounting bracket
(for underside mounting)
Adhesive feet 2002389 4
2018547 4
2009632 4
To attach the QM-MDM3X1 to the top of a QM-RMCRX-BA, use the following
procedure:
1. Attach the four adhesive “feet” provided with the QM-MDM3X1 to the
bottom surface, one in each corner.
2. Remove the front and rear screws from both side panels of the
QM-MDM3X1 and the front and rear screws from both side panels of the
QM-RMCRX-BA, as shown in the diagram on the following page.
3. Place the QM-MDM3X1 on top of the QM-RMCRX-BA and install the two
mounting brackets on each side of the pair, using the side panel screws from
step 2.
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Crestron QM-MDM3X1 3 x 1 QuickMedia™ Mini-Switcher
Attaching QM-MDM3X1 to a QM-RMCRX-BA
Mounting Bracket (4)
(2018547)
Underside Mounting
To attach the QM-MDM3X1 to the underside of a horizontal surface, use the
following procedure:
QM-MDM3X1 Bracket Dimensions for Underside Mounting
8.54 in
(21.69 cm)
4.47 in
(11.33 cm)
1. Remove the front and rear screws from both side panels of the
QM-MDM3X1, as shown in the diagram on the following page.
2. Install the two L-shaped mounting brackets on each side of the
QM-MDM3X1, using the side panel screws from step 1.
Operations & Installation Guide – DOC. 6608A 3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 • 11
3 x 1 QuickMedia™ Mini-Switcher Crestron QM-MDM3X1
3. Use four #6 hardware screws (not supplied) to secure the unit to the
underside of the surface.
Underside Mounting the QM-MDM3X1
Mounting Bracket (4)
(2009632)
NOTE: Do not over-tighten the screws as this may damage the surface and/or the
unit.
NOTE: To prevent overheating, do not operate this product in an area that exceeds
the environmental temperature range listed in the specifications table. Consideration
must be given if installed in a closed or multi-unit rack assembly, inside a closed
desk or in a closed podium since the operating ambient temperature of these
environments may be greater than the room ambient temperature. Contact with
thermal insulating materials should be avoided on all sides of the unit.
NOTE: When mounting the QM-MDM3X1 to the underside of a surface, to ensure
proper ventilation, make sure to orient the unit so the ventilation holes on the top
face upward. Similarly, when mounting to a vertical surface, orient the unit so the
ventilation holes on one of the sides face upward.
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Crestron QM-MDM3X1 3 x 1 QuickMedia™ Mini-Switcher
Hardware Hookup
Connect the Device
Make the necessary connections as called out in the illustration that follows this
paragraph. Refer to “Network Wiring” on page 8 before attaching the 4-position
terminal block connector. Apply power after all connections have been made.
Hardware Connections for the QM-MDM3X1
QM IN:
QUICKMEDIA PORTS CARRY
AUDIO, VIDEO, RGB AND
MICROPHONE SIGNALS
QUICKMEDIA PORT CARRIES
AUDIO, VIDEO, RGB AND
MICROPHONE SIGNALS
CONNECT TO CRESNET
CONTROL NETWORK
QM OUT:
CRESNET:
GROUND
24V DC:
FROM 24 VOLT DC
POWER SUPPLY
NOTE: For optimum performance, Crestron strongly recommends using
CresCAT-QM cable, available from Crestron. Other high-quality/low skew
CAT5e/CAT6 wiring may also be used with varying performance.
Ground Wire Connections
NOTE: Ensure the unit is properly grounded.
NOTE: The maximum continuous current from equipment under any external load
conditions shall not exceed a current limit that is suitable for the minimum wire
gauge used in interconnecting cables. The ratings on the connecting unit’s supply
input should be considered to prevent overloading the wiring.
Proper grounding is required. Connect the ground from the QM-MDM3X1 to earth
ground. Connect the Cresnet shield at the QM-RMCRX-BA to the chassis ground
provided on the QM-RMCRX-BA. The QM-RMCRX-BA chassis must also be
connected to an earth ground (building steel). Refer to the following grounding
diagram.
Ground Wire Connections
QM-RMCRX-BA
Ground
Wire to
Earth
Ground
Ground Wire
24
G
Cresnet
Y
Z
Shield
QM-MDM3X1
Ground
Terminal
to Earth
Ground
NOTE: Do not connect the shield to earth ground at the QM-MDM3X1.
Operations & Installation Guide – DOC. 6608A 3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 • 13
3 x 1 QuickMedia™ Mini-Switcher Crestron QM-MDM3X1
Programming Software
Have a question or comment about Crestron software?
Answers to frequently asked questions (FAQs) can be viewed in the Online Help
section of the Crestron website. To post a question or view questions you have
submitted to Crestron’s True Blue Support, log in at http://support.crestron.com.
First-time users will need to establish a user account.
Earliest Version Software Requirements for the PC
NOTE: Crestron recommends that you use the latest software to take advantage of
the most recently released features. The latest software is available from the Crestron
website.
Crestron has developed an assortment of Windows-based software tools to develop
a Cresnet system. For the minimum recommended software versions, visit the
version tracker page of the Crestron website (www.crestron.com/versiontracker
).
Configuration Manager
Programming with Crestron SystemBuilder
Crestron SystemBuilder is the easiest method of programming but does not offer as
much flexibility as SIMPL Windows. For additional details, download
SystemBuilder from the Crestron website and examine the extensive help file.
Programming with SIMPL Windows
NOTE: While SIMPL Windows can be used to program the QM-MDM3X1, it is
recommended to use SystemBuilder for configuring a QuickMedia system.
SIMPL Windows is Crestron’s premier software for programming Crestron control
systems. It is organized into two separate but equally important “Managers”.
Configuration Manager is the view where programmers “build” a Crestron control
system by selecting hardware from the Device Library.
• To incorporate the QM-MDM3X1 into the system, drag the QM-MDM3X1
from the Cresnet Control Modules | QM Series folder of the Device Library
and drop it in the System Views.
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Crestron QM-MDM3X1 3 x 1 QuickMedia™ Mini-Switcher
Locating the QM-MDM3X1 in the Device Library
• The system tree of the control system displays the device in the appropriate
slot with a default Net ID as shown in the following illustration.
C2Net Device, Slot 9
• Additional QM-MDM3X1 devices are assigned different Net ID numbers as
they are added.
• If necessary, double click a device to open the “Device Settings” window
and change the Net ID, as shown in the following figure.
“QM-MDM3X1 Device Settings” Window
Operations & Installation Guide – DOC. 6608A 3 x 1 QuickMedia™ Mini-Switcher: QM-MDM3X1 • 15
3 x 1 QuickMedia™ Mini-Switcher Crestron QM-MDM3X1
• The ID code specified in the SIMPL Windows program must match the Net
ID of each unit. Refer to “Identity Code” on page 9.
Program Manager
Program Manager is the view where programmers “program” a Crestron control
system by assigning signals to symbols.
The symbol can be viewed by double clicking on the icon or dragging it into Detail
View. Each signal in the symbol is described in the SIMPL Windows help file (F1).
Example Program
An example program for the QM-MDM3X1 is available from the Crestron website
(www.crestron.com/exampleprograms).
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Crestron QM-MDM3X1 3 x 1 QuickMedia™ Mini-Switcher
Uploading and Upgrading
Crestron recommends using the latest programming software and that each device
contains the latest firmware to take advantage of the most recently released features.
However, before attempting to upload or upgrade it is necessary to establish
communication. Once communication has been established, files (for example,
programs or firmware) can be transferred to the control system (and/or device).
Finally, program checks can be performed (such as changing the device ID or
creating an IP table) to ensure proper functioning.
Establishing Communication
Use Crestron Toolbox for communicating with the QM-MDM3X1; refer to the
Crestron Toolbox help file for details. There is a single method of communication:
indirect communication.
Indirect Communication
PC RUNNING
CRESTRON TOOLBOX
SERIAL,
ETHERNET
OR USB
CONTROL SYSTEM QM-MDM3X1
CRESNET
• QM-MDM3X1 connects to control system via Cresnet.
• Establish communication between the PC and the control system as
described in the latest version of the 2-Series Control Systems Reference
Guide (Doc. 6256).
• Use the Address Book in Crestron Toolbox to create an entry for the
QM-MDM3X1 using the expected communication protocol (Indirect).
Select the Cresnet ID of the QM-MDM3X1 and the address book entry of
the control system that is connected to the QM-MDM3X1.
• Display the QM-MDM3X1’s “System Info” window (click the
icon);
communications are confirmed when the device information is displayed.
Programs and Firmware
Program or firmware files may be distributed from programmers to installers or from
Crestron to dealers. Firmware upgrades are available from the Crestron website as
new features are developed after product releases. One has the option to upload
programs via the programming software or to upload and upgrade via the Crestron
Toolbox. For details on uploading and upgrading, refer to the SIMPL Windows help
file or the Crestron Toolbox help file.
SIMPL Windows
If a SIMPL Windows program is provided, it can be uploaded to the control system
using SIMPL Windows or Crestron Toolbox.
Firmware
Check the Crestron website to find the latest firmware. (New users may be required
to register to obtain access to certain areas of the site, including the FTP site.)
Upgrade QM-MDM3X1 firmware via Crestron Toolbox.
• Establish communication with the QM-MDM3X1 and display the “System
Info” window.
• Select Functions | Firmware… to upgrade the QM-MDM3X1 firmware.
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Program Checks
Using Crestron Toolbox, display the network device tree (Tools | Network Device
Tree) to show all network devices connected to the control system. Right-click on
the QM-MDM3X1 to display actions that can be performed on the QM-MDM3X1.
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Problem Solving
Troubleshooting
The following table provides corrective action for possible trouble situations. If
further assistance is required, please contact a Crestron customer service
representative.
QM-MDM3X1 Troubleshooting
TROUBLE POSSIBLE CAUSE(S) CORRECTIVE ACTION
Use the Right Wire
Device does not
function.
PWR LED does
not illuminate.
NET LED does
not illuminate
Loss of
functionality due
to electrostatic
discharge.
Device is not
communicating with the
network.
Device is not receiving
power from a Crestron
power source.
Device is not receiving
sufficient power.
Device is not receiving
power.
Improper Net ID used.
Improper grounding.
Use Crestron Toolbox to poll
the network. Verify network
connection to the device.
Use the provided Crestron
power source. Verify
connections.
Use the Crestron Power
Calculator to help calculate
how much power is needed
for the system.
Verify power connection from
either Cresnet or dedicated
power supply.
Verify that device ID matches
Net ID in the program.
Check that all ground
connections have been made
properly.
Check Network Wiring
In order to ensure optimum performance over the full range of your installation
topology, Crestron Certified Wire and only Crestron Certified Wire may be used.
Failure to do so may incur additional charges if support is required to identify
performance deficiencies because of using improper wire.
Calculate Power
CAUTION: Use only Crestron power supplies for Crestron equipment. Failure to
do so could cause equipment damage or void the Crestron warranty.
CAUTION: Provide sufficient power to the system. Insufficient power can lead to
unpredictable results or damage to the equipment. Please use the Crestron Power
Calculator to help calculate how much power is needed for the system
(www.crestron.com/calculators
).
When calculating the length of wire for a particular Cresnet run, the wire gauge and
the Cresnet power usage of each network unit to be connected must be taken into
consideration. Use Crestron Certified Wire only. If Cresnet units are to be daisychained on the run, the Cresnet power usage of each network unit to be daisychained must be added together to determine the Cresnet power usage of the entire
chain. If the unit is home-run from a Crestron system power supply network port, the
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Cresnet power usage of that unit is the Cresnet power usage of the entire run. The
wire gauge and the Cresnet power usage of the run should be used in the following
equation to calculate the cable length value on the equation’s left side.
Cable Length Equation
Strip and Tin Wire
Add Hubs
L = Length of run (or chain) in feet
R = 6 Ohms (Crestron Certified Wire: 18 AWG (0.75 MM ))
or 1.6 Ohms (Cresnet HP: 12 AWG (4 MM ))
P = Cresnet power usage of entire run (or chain)
2
2
L <
40,000
Where:
R x P
Make sure the cable length value is less than the value calculated on the right side of
the equation. For example, a Cresnet run using 18 AWG Crestron Certified Wire and
drawing 20 watts should not have a length of run more than 333 feet. If Cresnet HP
is used for the same run, its length could extend to 1250 feet.
NOTE: All Crestron certified Cresnet wiring must consist of two twisted pairs. One
twisted pair is the +24V conductor and the GND conductor and the other twisted
pair is the Y conductor and the Z conductor.
When daisy-chaining Cresnet units, strip the ends of the wires carefully to avoid
nicking the conductors. Twist together the ends of the wires that share a pin on the
network connector and tin the twisted connection. Apply solder only to the ends of
the twisted wires. Avoid tinning too far up the wires or the end becomes brittle.
Insert the tinned connection into the Cresnet connector and tighten the retaining
screw. Repeat the procedure for the other three conductors.
For larger networks (i.e., greater than 28 network devices), it may become necessary
to add a Cresnet Hub/Repeater (CNXHUB) to maintain signal quality throughout the
network. Also, for networks with lengthy cable runs it may be necessary to add a
Hub/Repeater after only 20 devices.
Reference Documents
The latest version of all documents mentioned within the guide can be obtained from
the Crestron website (www.crestron.com/manuals
). This link will provide a list of
product manuals arranged in alphabetical order by model number.
List of Related Reference Documents
DOCUMENT TITLE
2-Series Control Systems Reference Guide
MediaManager Applications Guide
Further Inquiries
If you cannot locate specific information or have questions after reviewing this
guide, please take advantage of Crestron's award winning customer service team by
calling the Crestron corporate headquarters at 1-888-CRESTRON [1-888-273-7876].
For assistance in your local time zone, refer to the Crestron website
(www.crestron.com/offices
You can also log onto the online help section of the Crestron website
(www.crestron.com/onlinehelp
users will need to establish a user account to fully benefit from all available features.
) for a listing of Crestron worldwide offices.
) to ask questions about Crestron products. First-time
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Future Updates
As Crestron improves functions, adds new features and extends the capabilities of
the QM-MDM3X1, additional information may be made available as manual
updates. These updates are solely electronic and serve as intermediary supplements
prior to the release of a complete technical documentation revision.
Check the Crestron website periodically for manual update availability and its
relevance. Updates are identified as an “Addendum” in the Download column.
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Return and Warranty Policies
Merchandise Returns / Repair Service
1. No merchandise may be returned for credit, exchange or service without prior authorization
from CRESTRON. To obtain warranty service for CRESTRON products, contact an
authorized CRESTRON dealer. Only authorized CRESTRON dealers may contact the factory
and request an RMA (Return Merchandise Authorization) number. Enclose a note specifying
the nature of the problem, name and phone number of contact person, RMA number and
return address.
2. Products may be returned for credit, exchange or service with a CRESTRON Return
Merchandise Authorization (RMA) number. Authorized returns must be shipped freight
prepaid to CRESTRON, 6 Volvo Drive, Rockleigh, N.J. or its authorized subsidiaries, with
RMA number clearly marked on the outside of all cartons. Shipments arriving freight collect
or without an RMA number shall be subject to refusal. CRESTRON reserves the right in its
sole and absolute discretion to charge a 15% restocking fee plus shipping costs on any
products returned with an RMA.
3. Return freight charges following repair of items under warranty shall be paid by CRESTRON,
shipping by standard ground carrier. In the event repairs are found to be non-warranty, return
freight costs shall be paid by the purchaser.
CRESTRON Limited Warranty
CRESTRON ELECTRONICS, Inc. warrants its products to be free from manufacturing defects in materials
and workmanship under normal use for a period of three (3) years from the date of purchase from
CRESTRON, with the following exceptions: disk drives and any other moving or rotating mechanical
parts, pan/tilt heads and power supplies are covered for a period of one (1) year; touchscreen display and
overlay components are covered for 90 days; batteries and incandescent lamps are not covered.
This warranty extends to products purchased directly from CRESTRON or an authorized CRESTRON
dealer. Purchasers should inquire of the dealer regarding the nature and extent of the dealer's warranty, if
any.
CRESTRON shall not be liable to honor the terms of this warranty if the product has been used in any
application other than that for which it was intended or if it has been subjected to misuse, accidental
damage, modification or improper installation procedures. Furthermore, this warranty does not cover any
product that has had the serial number altered, defaced or removed.
This warranty shall be the sole and exclusive remedy to the original purchaser. In no event shall
CRESTRON be liable for incidental or consequential damages of any kind (property or economic damages
inclusive) arising from the sale or use of this equipment. CRESTRON is not liable for any claim made by a
third party or made by the purchaser for a third party.
CRESTRON shall, at its option, repair or replace any product found defective, without charge for parts or
labor. Repaired or replaced equipment and parts supplied under this warranty shall be covered only by the
unexpired portion of the warranty.
Except as expressly set forth in this warranty, CRESTRON makes no other warranties, expressed or
implied, nor authorizes any other party to offer any warranty, including any implied warranties of
merchantability or fitness for a particular purpose. Any implied warranties that may be imposed by law are
limited to the terms of this limited warranty. This warranty statement supersedes all previous warranties.
Trademark Information
All brand names, product names and trademarks are the sole property of their respective owners. Windows is a registered trademark
of Microsoft Corporation. Windows95/98/Me/XP/Vista and WindowsNT/2000 are trademarks of Microsoft Corporation.
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Crestron Electronics, Inc. Operations & Installation Guide – DOC. 6608A
15 Volvo Drive Rockleigh, NJ 07647 (2018858)
Tel: 888.CRESTRON 12.07
Fax: 201.767.7576 Specifications subject to
www.crestron.com change without notice.
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