Black Box ACX1MT Series User manual

Increase the distance between a source (computer,
CPU) and its console (keyboard, mouse, and other
peripheral devices).
Models available for CATx or fiber.
DKM KVM Extender TX/RX Interface Modules
ACX1MT Series ACXMODH2*
ACX1MR Series ACXMODH4*
ACXMODH6*
ACXMODH21*
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
www.blackbox.com • [e-mail]
Customer
Support
Information

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Trademarks Used in this Manual/DIsclaimer
We‘re here to help! If you have any questions about your application
or our products, contact Black Box Tech Support at 724-746-5500
or go to blackbox.com and click on “Talk to Black Box.”
You’ll be live with one of our technical experts in less than 60 seconds.
Trademarks Used in this Manual
Black Box and the Double Diamond logo are registered trademarks of BB Technologies, Inc.
Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.
Disclaimer
Black Box Network Services shall not be liable for damages of any kind, including, but not limited to, punitive, consequential or
cost of cover damages, resulting from any errors in the product information or specifications set forth in this document and Black
Box Network Services may revise this document at any time without notice.

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FCC/CE/WEEE Information
Federal Communications Commission and Industry Canada Radio Frequency Interference
Statements
This equipment generates, uses, and can radiate radio-frequency energy, and if not installed and used properly, that is, in strict
accordance with the manufacturer’s instructions, may cause interference to radio communication. It has been tested and found to
comply with the limits for a Class A computing device in accordance with the specifications in Subpart B of Part 15 of FCC rules,
which are designed to provide reasonable protection against such interference when the equipment is operated in a commercial
environment. Operation of this equipment in a residential area is likely to cause interference, in which case the user at his own
expense will be required to take whatever measures may be necessary to correct the interference.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to
operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio
Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques
de la classe A prescrites dans le Règlement sur le brouillage radioélectrique publié par Industrie Canada.
CE Declaration of Conformity
Disclaimer:
Black Box Network Services shall not be liable for damages of any kind, including, but not limited to, punitive, consequential or cost of cover damages, resulting
from any errors in the product information or specifications set forth in this document and Black Box Network Services may revise this document at any time
without notice.

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NOM Statement
Instrucciones de Seguridad
(Normas Oficiales Mexicanas Electrical Safety Statement)
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca de la tina de baño, lavabo, sótano mojado o cerca
de una alberca, etc.
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de operación.
Todo otro servicio deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no interfiera su uso. La colocación del aparato eléctrico
sobre una cama, sofá, alfombra o superficie similar puede bloquea la ventilación, no se debe colocar en libreros o gabinetes
que impidan el flujo de aire por los orificios de ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de calor, estufas u otros
aparatos (incluyendo amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como
se indique en el aparato.
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados
sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.

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Table of Contents
Table of Contents
1. Specifications ....................................................................................................................................................................9
1.1 Interfaces ....................................................................................................................................................................9
1.1.1 DVI-D Single Link ........................................................................................................................................9
1.1.2 DVI-D Dual Link...........................................................................................................................................9
1.1.3 DVI-I Single Link ..........................................................................................................................................9
1.1.4 HDMI Single-Link ........................................................................................................................................9
1.1.5 DisplayPort ..................................................................................................................................................9
1.1.6 USB-HID ......................................................................................................................................................9
1.1.7 PS/2........................................................................................................................................................... 10
1.1.8 USB 2.0 (transparent) ................................................................................................................................ 10
1.1.9 RJ-45 (Interconnect).................................................................................................................................. 10
1.1.10 Fiber SFP Type LC (Interconnect) ............................................................................................................... 10
1.1.11 Serial Interface........................................................................................................................................... 10
1.1.12 Serial Interface RS-422 .............................................................................................................................. 11
1.1.13 Analog Audio Interface ............................................................................................................................. 12
1.1.14 Digital Audio Interface .............................................................................................................................. 12
1.2 Interconnect Cable.................................................................................................................................................... 13
1.2.1 CATx.......................................................................................................................................................... 13
1.2.2 Fiber .......................................................................................................................................................... 14
1.3 Supported Peripherals ............................................................................................................................................... 15
1.3.1 USB-HID Devices ....................................................................................................................................... 15
1.3.2 USB 2.0 Devicese....................................................................................................................................... 15
1.4 Connector Pinouts .................................................................................................................................................... 15
1.5 Power Supply, Environmental Conditions, Dimensions, and Shipping Weight...........................................................23
2. Overview ..................................................................................................................................................................24
2.1 Application................................................................................................................................................................ 24
2.2 System Overview.......................................................................................................................................................24
2.3 Part Numbers ............................................................................................................................................................25
2.3.1 Chassis ......................................................................................................................................................25
2.3.2 KVM Extender Modules............................................................................................................................ 26
2.3.3 Upgrade Modules .....................................................................................................................................29
2.3.4 Chassis for Free Configuration...................................................................................................................30
2.4 Accessories Upgrade Kits ..........................................................................................................................................31
2.5 Accessories................................................................................................................................................................ 31
2.6 Device Views.............................................................................................................................................................32
2.6.1 Compatible Chassis ...................................................................................................................................32
2.6.2 ACX1MT-DHID-C/ACX1MR-DHID-C ......................................................................................................... 41
2.6.3 ACX1MT-VDHID-C /ACX1MR-VDHID-C.................................................................................................... 41
2.6.4 ACX1MT-DHID-SM/ACX1MR-DHID-SM ....................................................................................................42
2.6.5 ACX1MT-DHS-SM/ACX1MR-DHS-SM .......................................................................................................42
2.6.6 ACX1MT-VDHID-SM/ACX1MR-VDHID-SM................................................................................................43
2.6.7 ACX1MT-DHID-2C/ACX1MR-DHID-2C......................................................................................................43
2.6.8 ACX1MT-VDHID-2S/ACX1MR-VDHID-2S ..................................................................................................44
2.6.9 ACX1MT-DHID-2S/ACX1MR-DHID-2S.......................................................................................................44
2.6.10 ACX1MT-VDHID-2S/ACX1MR-VDHID-2S ..................................................................................................45
2.6.11 ACX1MT-DVHID-C/ACX1MR-DVHID-C ....................................................................................................45
2.6.12 ACX1MT-DVHID-SM/ACX1MR-DVHID-SM ...............................................................................................46

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Table of Contents
2.6.13 ACX2MT-DLH-C/ACX2MR-DLH-C............................................................................................................46
2.6.14 ACX2MT-DHH-C/ACX2MR-DHH-C.......................................................................................................... 47
2.6.15 ACX2MT-DLH-SM/ACX2MR-DLH-SM.......................................................................................................47
2.6.16 ACX2MT-DHH-SM/ACX2MR-DHH-SM ....................................................................................................48
2.6.17 ACX2MT-DHHS-SM/ACX2MR-DHHS-SM .................................................................................................48
2.6.18 ACX2MT-DLHS-SM/ACX2MR-DLHS-SM...................................................................................................48
2.6.19 ACX2MT-DLH-2C/ACX2MR-DLH-2C ........................................................................................................49
2.6.20 ACX2MT-DHH-2C/ACX2MR-DHH-2C ......................................................................................................49
2.6.21 ACX2MT-DLH-SM/ACX2MR-DLH-SM.......................................................................................................50
2.6.22 ACX1MT-HDMI-C/ACX1MR-HDMI-C .......................................................................................................50
2.6.23 ACX1MT-HDMI/ACX1MR-HDMI ............................................................................................................... 51
2.6.24 ACX1MT-HDM2-C .................................................................................................................................... 51
2.6.25 ACX1MT-HDM2-2C/ACX1MR-HDM2-2C .................................................................................................. 52
2.6.26 ACXMT-HDMI-SM/ACX1MR-HDMI-SM....................................................................................................52
2.6.27 ACX1MT-HDMI-2C/ACX1MR-HDMI-2C....................................................................................................53
2.6.28 ACX1MT-HDM2-SM/ACX1MR-HDM2-SM ................................................................................................53
2.6.29 ACX1MT-HDM2-2S/ACX1MR-HDM2-2S ...................................................................................................54
2.6.30 ACX1MR-HDSW-C....................................................................................................................................54
2.6.31 ACX1MR-HDSW-2C ..................................................................................................................................55
2.6.32 ACX1MR-HDSW-SM .................................................................................................................................55
2.6.33 ACX1MR-HDSW-2S...................................................................................................................................56
2.6.34 ACX1MT-HDO-C/ACX1MR-HDO-C ..........................................................................................................56
2.6.35 ACX1MT-HDO-SM/ACX1MR-HDO-SM .....................................................................................................57
2.6.36 ACX1MT-DPH-C/ACX1MR-DPH-C ............................................................................................................57
2.6.37 ACX1MT-DPH-SM/ACX1MR-DPH-SM .......................................................................................................58
2.6.38 ACX1MT-DPHS-SM/ACX1MR-DPHS-SM ...................................................................................................58
2.6.39 ACX1MT-DPH-2C/ACX1MR-DPH-2C......................................................................................................... 59
2.6.40 ACX1MT-DPH-2S/ACX1MR-DPH-2S..........................................................................................................59
3.6.41 ACX1MT-DPHS-2S/ACX1MR-DPHS-2S ......................................................................................................60
2.6.42 ACX1MT- HID /ACX1MR- HID ......................................................................................................................60
2.6.43 ACX1MT-EU/ACX1MR-EU .........................................................................................................................60
2.6.44 ACX1MT-AR/ACX1MR-AR ........................................................................................................................ 61
2.6.45 ACX1MT-ARP/ACX1MR-ARP..................................................................................................................... 61
2.6.46 ACX1MT-DA/ACX1MR-DA........................................................................................................................62
2.6.47 ACX1MT-ARH/ACX1MR-ARH ...................................................................................................................62
2.6.48 ACX1MT-DAH/ACX1MR-DAH...................................................................................................................63
2.6.49 ACX1MT-ARE/ACX1MR-ARE.....................................................................................................................63
2.6.50 ACX1MT-DAE/ACX1MR-DAE ....................................................................................................................64
2.6.51 ACX1MT-DAX/ACX1MR-DAX...................................................................................................................64
2.6.52 ACX1MT-ARD/ACX1MR-ARD ...................................................................................................................65
2.6.53 ACX1MT-U2-C/ACX1MR-U2-C .................................................................................................................65
2.6.54 ACX1MT-U2-SM/ACX1MR-U2-SM ............................................................................................................66
2.7 Status LEDs................................................................................................................................................................66
2.7.1 KVM Extender Module Status...................................................................................................................66
2.7.2 KVM Extender Module VGA/DVI-I Status .................................................................................................67
2.7.3 Upgrade Module Digital Audio Status.......................................................................................................68
2.7.4 Upgrade Module USB-HID Status..............................................................................................................69
2.7.5 Upgrade Module USB 2.0 Embedded Status.............................................................................................70
2.7.6 Upgrade Module USB 2.0 Status............................................................................................................... 71

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Table of Contents
3. Installation ..................................................................................................................................................................72
3.1 What's Included ........................................................................................................................................................72
3.2 System Setup ............................................................................................................................................................ 74
3.2.1 KVM Extender Setup................................................................................................................................. 74
3.2.2 Upgrade Modules Setup ........................................................................................................................... 74
3.3 Example Applications ................................................................................................................................................76
4. Configuration ..................................................................................................................................................................78
4.1 Transmission Parameters ...........................................................................................................................................78
4.2 DDC Settings.............................................................................................................................................................78
4.3 Command Mode.......................................................................................................................................................78
4.4 USB-HID Ghosting.....................................................................................................................................................79
4.5 Configuration File......................................................................................................................................................80
4.5.1 CPU Units Parameters ...............................................................................................................................80
4.5.2 CON Units Parameters............................................................................................................................... 81
4.5.3 CPU and CON Units Parameters................................................................................................................82
5. Operation ..................................................................................................................................................................83
5.1 DDC Information Download .....................................................................................................................................83
5.2 Redundant CPU Units Shared Operation...................................................................................................................83
6. Troubleshooting ..................................................................................................................................................................85
6.1 General Failures.........................................................................................................................................................85
6.2 Blank Screen..............................................................................................................................................................85
6.3 USB-HID ..................................................................................................................................................................86
6.4 Serial Connection ......................................................................................................................................................86
6.5 Analog Audio............................................................................................................................................................87
6.6 Digital Audio .............................................................................................................................................................87
6.7 USB-HID Upgrade Module ........................................................................................................................................88
6.8 USB 2.0 Embedded ...................................................................................................................................................88
6.9 USB 2.0 Upgrade Module .........................................................................................................................................89
7. Technical Support Information.............................................................................................................................................90
7.1 Contacting Technical Support ...................................................................................................................................90
7.2 Shipping and Packaging............................................................................................................................................90
8. Glossary ..................................................................................................................................................................91

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Safety Instructions
Safety Instructions
To ensure reliable and safe long-term operation of your KVM Extender please note the following guidelines:
Installation
• Only use in dry, indoor environments.
• The KVM Extender and the power supply units can get warm. Do not install components in an enclosed space without any
airflow.
• Do not place the power supply directly on top of the device.
• Do not obscure ventilation holes.
• Only use power supplies originally supplied with the product or manufacturer-approved replacements. Do not use a power
supply if it appears to be defective or has a damaged chassis.
• Connect all power supplies to grounded outlets. In each case, ensure that the ground connection is maintained from the outlet
socket through to the power supply's AC power input.
• Do not connect the link interface to any other equipment, particularly network or telecommunications equipment.
• Take any required ESD precautions.
NOTE: To disconnect the device completely from the electric circuit, all power cables have to be removed.
Repair
• Do not attempt to open or repair a power supply unit.
• Do not attempt to open or repair the KVM Extender. There are no user serviceable parts inside.
• Please contact Black Box Technical Support at 724-746-5500 or [e-mail] if there is a fault.

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Chapter 1: Specifications
1. Specifications
1.1 Interfaces
1.1.1 DVI-D Single Link
The video interface supports the DVI-D protocol. All signals that comply with the DVI-D Single-Link specification can be
transmitted. This includes, for example, monitor resolutions such as 1920 x 1200 @ 60 Hz, Full HD (1080p), or 2K HD (up to 2048
x 1152). Data rate is limited to 165 Megapixels per second.
1.1.2 DVI-D Dual Link
The video interface supports the DVI-D protocol. All signals that comply to DVI-D Dual Link norm can be transmitted. This includes
monitor resolutions up tp 2560x2048@60Hz. Data rate is limited to 330 MPixel/s.
1.1.3 DVI-I Single Link
The video interface supports the DVI-I protocol. All analog (VGA) or digital (DVI) signals that comply with the DVI-I Single-Link
specification can be transmitted. This includes monitor resolutions for VGA up to 1920 x 1200 @ 60 Hz, and monitor resolutions
for DVI-I up to Full HD (1080p) or for DVI-D 2K HD (up to 2048 x 1152). Data rate is limited to 165 Megapixels per second.
NOTE: Transmission of interlaced video signals, such as 1920 x 1080i, cannot be guaranteed.
1.1.4 HDMI Single Link
Video
The audio/ video interface can transmit monitor resolutions such as 1920 x1200 @60 Hz, Full HD (1080p) or 2K HD (up to 2048 x
1152). Data rate is limited to 165 MPixel/s and 8 bit.
Audio
The audio format PCM can be transmitted through the interface.
• Standards: Stereo Linear Pulse Code Modulation (LPCM)
• Bit Depth: 16 bit
• Sample Rate: Up to 96 kHz
Further audio formats will be supported in the future through a firmware update.
3D
The interface is compatible to 3D, so the 3D formats Side-by-Side and Top-and-Bottom can be transmitted.
NOTE: HDCP coded content is currently not supported.
1.1.5 DisplayPort
Video
The video interface supports the DisplayPort 1.2 standard. All signals that comply with this standard can be transmitted. This
includes monitor resolutions up to 2560 x 2048@ 60 Hz or 3840 x 2160 @30 Hz. Data rate is limited to 330 MPixel/s.
Audio
Various audio formats can be transmitted through the interface.
• Standards: Stereo Linear Pulse Code Modulation (LPCM), DTS, DTS-HD (5.1), Dolby Digital, Dolby Digital Plus (5.1)
• Bit Depth: 16 to 24 bit
• Sample-Rate: 32 to 192 kHz
1.1.6 USB-HID
Our devices with an USB-HID interface support a maximum of two devices compliant with the USB-HID protocol. Each USB-HID
port provides a maximum current of 100 mA.

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Chapter 1: Specifications
Keyboard
Compatible with most USB keyboards. Certain keyboards with additional functions may require custom firmware to operate.
Keyboards with an integral USB hub (such as Mac®keyboards) can also be supported using non-USB HID cards.
Mouse
Compatible with most 2-button, 3-button, and scroll mice.
Other USB-HID devices
The proprietary USB emulation also supports certain other USB-HID devices, such as specific touchscreens, graphics tablets,
bar-code scanners or special keyboards. Support cannot be guaranteed, however, for every USB-HID device.
NOTE: Only two USB-HID devices are supported concurrently, such as keyboard and mouse or keyboard and touchscreen. A hub
is allowed, but it does not increase the number of HID devices allowed.
To support other USB ”non-HID” devices, such as scanners, Web cams, or memory devices, choose our devices with transparent
USB support.
1.1.7 PS/2
Our devices with PS/2 interface support the use of a PS/2 keyboard and mouse.
Keyboard
Compatible with most PS/2 keyboards, even with various special keyboards. Certain keyboards with additional functions can be
run with special firmware.
Mouse
Compatible with most 2-button, 3-button and scroll mice.
1.1.8 USB 2.0 (transparent)
DKM Modular Extender models with transparent USB 2.0 support allow the connection of all types of USB 2.0 devices (without
restriction). USB 2.0 data transfer is supported, depending on the upgrade module, with high-speed USB (max. 480 Mbps) or full-
speed USB (max. 36 Mbps).
Each USB 2.0 port provides a maximum current of 500 mA (high power). When using a USB high speed interface with 4 USB
ports, respectively 2 connectors provides a maximum of 500 mA (high power) and 2 connectors a maximum of 100 mA.
1.1.9 RJ-45 (Interconnect)
For CATx communications, the extender requires a 1000BASE-T connection.
Connector wiring must comply with EIA/TIA-568-B (1000BASE-T), with RJ-45 connectors at both ends. All four cable wire pairs
are used.
1.1.10 Fiber SFP Type LC (Interconnect)
The communication of fiber devices is performed via Gigabit SFPs that have to be connected to suitable fibers fitted with type LC
connectors.
NOTE: The correct function of the device can only be guaranteed with SFPs provided by Black Box.
CAUTION: SFP modules can be damaged by electrostatic discharge (ESD).
When handling, take care not to damage devices.
1.1.11 Serial Interface
The serial interface option supports a full-duplex transmission with a real hardware handshake up to a baud rate of 19,200.
The CON module is cabled as DTE (Data Terminal Equipment, such as CPU output) and can be connected directly to DCE (Data
Communication Equipment) devices.
• A touchscreen can be connected directly to the CON module.

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Chapter 1: Specifications
• To connect to a serial printer (or any other DTE instead of DCE device), you need a null-modem cable (cross-over cable)
between the CON module and the device.
Operation of several devices:
The serial interface transmits six signals (three for each direction). Normally, four of the six signals are handshake signals (in
addition to RxD and TxD). The following configurations, however, are possible using special adapter splitting cables:
• Three single 2-wire transmissions.
• Two transmissions with a handshake signal.
• A serial mouse and a single 2-wire transmission.
In this case, choose X-ON/X-OFF software handshake for traffic control at the printer and PC.
• Connection Format: DTE (Data Terminal Equipment)
• Speed: Up to 19,200 Baud
• Data Format: Format independent
• Data Transmission:
- RxD (Receive Data)
- TxD (Transmit Data)
• Traffic Control: The following signals are transmitted (hardware handshake):
- RTS (Request To Send)
- CTS (Clear To Send)
- DTR (Data Terminal Ready)
- DSR (Data Set Ready)
1.1.12 Serial Interface RS-422
KVM Extenders with a serial interface RS-422 (DB9) support a differential full-duplex transmission up to a Baud rate of 115,200
Baud.
The CPU unit is designed as controlling device and can, for example, be connected directly to video or media servers.
The CON unit is designed as a controlled device and so can be connected directly to remote controllers.
Table 1-1. Serial interface specifications.
Specification Description
Connection Format DTE (Data Terminal Equipment)
Speed Up to 115,200 baud
Data Format Format independent
Data Transmission
• RxD (Receive Data)
• TxD (Transmit Data)
Traffic Control
The following signals are transmitted (hardware handshake):
• RTS (Request to Send)
• CTS (Clear to Send)
• DTR (Data Terminal Ready)
• DSR (Data Set Ready)

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Chapter 1: Specifications
1.1.13 Analog Audio Interface
The Analog Audio option supports a bidirectional stereo audio transmission, in nearly CD quality.
The audio interface is a “line level” interface and it is designed to transmit the signals of a sound card (or another “line level”
device) as well as to allow the connection of active speakers to the CON module.
Stereo audio can be transmitted bidirectionally at the same time.
Connection of a microphone:
Connect the microphone to the “audio” input of the CON module. There are two ways to establish this connection:
• The output of the CPU module is connected with the microphone input of the sound card (red). Adjust the sound card to
provide an additional amplification (20 dB).
• The output of the CPU module is connected to the audio input of the sound card (blue). Choose this connection if the
microphone has its own pre-amplifier.
NOTE: The CON module can do the pre-amplification of the microphone as well. Open the CON module, locate the “MIC” jumper
on the audio board and close the pins.
Table 1-2. Analog audio specifications.
Specification Description
Transmission Format Digitized virtually CD-quality audio (16-bit, 38.4 kHz)
Signal Level Line-level (5-volt peak-peak maximum)
Input Impedance 47 kOhm
Connections CPU Unit (2) 3.5-mm stereo audio plug (audio in and audio out)
Connections CON Unit (2) 3.5-mm stereo audio plug (audio in and audio out)
1.1.14 Digital Audio Interface
The digital audio option supports the unidirectional transmission of digital audio data.
Up to three sources can be connected to the CPU module. The active source is transmitted. If several sources are active, the XLR
signal takes priority, otherwise the first active signal.
Up to three sinks can be connected to the CON module. The signal is available at all outputs concurrently.
DKM Modular Extender with digital audio option includes a built-in sample rate converter that provides predefined sample
frequencies at the CON module’s output.
The user can set the following parameters directly via a configuration file:
• Activate or deactivate sample rate converter
• Set sample frequency of the sample rate converter. The following sample frequencies are available:
– 32.0 kHz
– 44.1 kHz
– 48.0 kHz
– 96.0 kHz
• To deactivate the sample rate converter, write SRC_NONE in the Config.txt file of the CPU unit.

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Chapter 1: Specifications
Table 1-3. Digital audio interface specifications.
Specification Description
Compatibility AES/EBU, S/PDIF, EIAJCP1201, IEC 60958
Standards Dolby digital, DTS, PCM
CPU Unit (Inputs)
• Mini XLR (AES/EBU; symmetrical lockable)
• Coaxial (S/PDIF; RCA, Cinch)
• Optical (S/PDIF, TOSLINK®)
CON Unit (Outputs)
• Mini XLR (AES/EBU; symmetrical, lockable)
• Coaxial (S/PDIF, RCA, Cinch
• Optical (S/PDIF, TOSLINK)
1.2 Interconnect Cable
1.2.1 CATx
NOTE: A point-to-point connection is required. Operation with several patch fields is possible. Routing over an active network
component, such as an Ethernet hub, router, or switch, is not allowed.
• Avoid routing CATx cables along power cables.
• If the site has 3-phase AC power, make sure that the CPU module and CON module are on the same phase.
CAUTION: To maintain regulatory EMC compliance, you must use correctly installed shielded CATx cable throughout the
interconnection link. Also, all CATx cables need to have ferrites on both cable ends close to the device.
Type of Interconnect Cable
The DKM Modular Extender requires interconnect cabling specified for Gigabit Ethernet (1000BASE-T). The use of solid-core (24
AWG), shielded, CAT5e (or better) is recommended.
Table 1-4. CATx interconnect cable specifications.
Parameter Description
CATx solid-core cable 24 AWG
S/UTP (CAT5e) cable according to EIA/TIA-568-B. Four pairs of
24 AWG wires. Connection according to EIA/TIA-568-B
(1000BASE-T).
CATx patch cable 26/8 AWG
S/UTP (CAT5e) cable according to EIA/TIA-568-B. Four pairs of
26/8 AWG wires. Connection according to EIA/TIA-568-B
(1000BASE-T).
NOTE: You can use flexible cables (patch cables) type 26/8 AWG; however, but you’ll only get half the maximum possible
extension distance (Table 1-5).

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Maximum Acceptable Cable Length
Table 1-5. Maximum acceptable CATx cable length.
Cable Type Maximum Length
Solid-conductor 24 AWG CATx cable 400 feet (140 m)
Stranded-conductor 26/28 or 27/28 AWG or CATx cable 200 feet (70 m)
1.2.2 Fiber
NOTE: A point-to-point connection is necessary. Operation with multiple patch panels is allowed. Routing over active network
components, such as Ethernet hubs, switches, or routers, is not allowed.
Type of Interconnect Cable
(Cable notations according to VDE)
Table 1-6. Fiber cable specifications.
Cable Type Description
Single-mode fiber 9 µm
• Duplex.
• Indoor patch cable (EFN092)
Multimode fiber 50 µm
• Duplex.
• Indoor patch cable (EFN6020)
Multimode fiber 62.5 µm
• Duplex.
• Indoor patch cable (EFN116-LCLC)
Table 1-7. Maximum acceptable fiber cable length specifications.
Cable Type Description
Single-mode fiber 9 µm 32,800 feet (10,000 m)
Single-mode 9µm XV 5,000 m (16,400 ft)
Multimode fiber 50 µm (OM3) 3280 feet (1000 m)
Multimode fiber 50 µm 1300 feet (400 m)
Multimode fiber 62.5 µm 650 feet (200 m)
NOTE: If you use single-mode SFPs with multimode fibers, you can normally double the maximum acceptable cable length.
Connector type
The Modular Extenders have fiber LC connectors.

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Chapter 1: Specifications
1.3 Supported Peripherals
1.3.1 USB-HID Devices
The DKM Modular Extender will support most USB-HID devices, including the vast majority of keyboards and mice currently on
the market. Many other kinds of HID devices such as bar-code scanners and touchscreens may also be compatible.
It is not possible to guarantee support for all available USB-HID devices. In certain cases, you may need custom firmware.
USB-HID (and other) devices that are not supported as standard will normally operate with our devices featuring transparent USB
support.
NOTE: Concurrent operation of more than two USB-HID devices is not possible even if you use a USB hub.
1.3.2 USB 2.0 Devices
DKM Modular Extender models featuring a transparent USB 2.0 connection use Extreme USB Technology. This technology
supports all types of USB 2.0 devices; however, we cannot guarantee compatibility with every device on the market. Please
contact Black Box Technical Support at 724-746-5500 or [e-mail] if any issues are found.
1.4 Connector Pinouts
Connector DVI Single-Link
Figure 1-1. DVI-D single-link connector.
Table 1-8. DVI-D single-link connector pinout.
Pin Signal Pin Signal Pin Signal
1TMDS data 2- 9TMDS data 1- 17 TMDS data 0-
2TMDS data 2+ 10 TMDS data 1+ 18 TMDS data 0+
3TMDS data 2 GND 11 TMDS data 1 GND 19 TMDS data 0 GND
4Not connected 12 Not connected 20 Not connected
5Not connected 13 Not connected 21 Not connected
6DDC input (SCL) 14 +5 VDC high impedance 22 TMDS clock GND
7DDC output (SDA) 15 GND 23 TMDS clock +
8Internal use 16 Hot-plug recogniition 24 TMDS clock -
C1 Internal use — — C3 Internal use
C2 Not connected C5 GND C4 Internal use

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Chapter 1: Specifications
Connector DVI Dual-Link
Figure 1-2. DVI-D dual link connector.
Table 1-9. DVI-D dual-link connector pinout.
Pin Signal Pin Signal Pin Signal
1GND 21 RX5_U 41 GND
2Not connected 22 GND 42 GND
3Not connected 23 Not connected 43 GND
4GND 24 Not GND 44 BRXC_N
55V DVI 25 RX2_P 45 BRXC_P
6DDC SCL 26 RX2_N 46 GND
7DDC SDA 27 RX1_P 47 Not connected
8GND 28 RX1_N 48 Not connected
9BDDC SDA 29 RX0_P 49 GND
10 BDDC SCL 30 RX0_N 50 Not connected
11 B5V DVI 31 RXC_P 51 Not connected
12 GND 32 RXC_N 52 GND
13 Not connected 33 GND 53 Not connected
14 Not connected 34 GND 54 GND
15 GND 35 GND 55 Not connected
16 RX3_P 36 HPD 56 Not connected
17 RX3_N 37 Not connected 57 GND
18 RX4_P 38 Not connected 58 Not connected
19 RX4_N 39 Not connected 59 Not connected
20 RX5_P 40 BHPDT 60 GND

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Chapter 1: Specifications
Connector DVI-I Single-Link
Figure 1-3. DVI-I connector.
Table 1-10. DVI-I single-link connector pinout.
Pin Signal Pin Signal Pin Signal
1TMDS data 2- 9TMDS data 1- 17 TMDS data 0-
2TMDS data 2+ 10 TMDS data 1+ 18 TMDS data 0+
3TMDS data 2 GND 11 TMDS data 1 GND 19 TMDS data 0 GND
4Not connected 12 Not connected 20 Not connected
5Not connected 13 Not connected 21 Not connected
6DDC input (SCL) 14 +5 VDC high impedance 22 TMDS clock GND
7DDC output (SDA) 15 GND 23 TMDS clock +
8V-sync 16 Hot-plug recogniition 24 TMDS clock -
C1 Red signal — — C3 Blue signal
C2 Green signal C5 GND C4 H-sync
Connector HDMI Single-Link
Figure 1-4. HDMI single-link connector.
Table 1-11. HDMI single-link connector pinout.
Pin Signal Pin Signal Pin Signal
1T.M.D.S data 2 + 8T.M.D.S data 0 GND 15 DDC Input (SCL)
2T.M.D.S data 2 GND 9T.M.D.S data 0 - 16 DDC Output (SDA)
3T.M.D.S data 2 - 10 T.M.D.S clock + 17 DDC/CEC/HEC GND
4T.M.D.S data 1 + 11 T.M.D.S clock GND 18 +5VDC high impedance
5T.M.D.S data 1 GND 12 T.M.D.S clock - 19 Hot Plug recognition
6DDC Input (SCL) 13 CEC — —
7T.M.D.S data 1 - 14 HEC data - — —

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Chapter 1: Specifications
DisplayPort connector
Figure 1-5. HDMI single-link connector.
Table 1-12. HDMI single-link connector pinout.
Pin Signal Pin Signal Pin Signal
1
ML-LANE3(N)
8
GND
15
AUX CH(P)
2
GND
9
ML-LANE1(P)
16
GND
3
ML-LANE3(P)
10
ML-LANE0(N)
17
AUX CH(N)
4
ML-LANE2(N)
11
GND
18
Hot Plug Detect
5
GND
12
ML-LANE0(P)
19
Power Out Return
6
ML-LANE2(P)
13
Config1/GND
20 Power Out (not connected)
7
ML-LANE1(N)
14
Config2/GND
— —
Connector USB Type B
Figure 1-6. USB Type B connector.
Table 1-13. USB Type B connector pinout.
Pin Signal Color
1VCC (+5 VDC) Red
2Data - White
3Data + Green
4GND Black

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Chapter 1: Specifications
Connector USB Type A
Figure 1-7. USB Type A connector.
Table 1-14. USB Type A connector pinout.
Pin Signal Color
1VCC (+5 VDC) Red
2Data - White
3Data + Green
4GND Black
Connector Mini USB Type B
Figure 1-8. Mini USB Type B connector.
Table 1-15. Mini USB Type B connector pinout.
Pin Signal Color
1VCC (+5 VDC) Red
2Data - White
3Data + Green
4Not connected —
5GND Black
Connector PS/2
Figure 1-9. PS/2 connector.
Table 1-16. PS/2 connector pinout.
Pin Signal
1Data
2GND
3VCC (+ 5VDC)
4CLK
5Not connected
6Not connected

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Chapter 1: Specifications
RJ-45 connector
Figure 1-10. RJ-45 connector.
Table 1-17. RJ-45 connector pinout.
Pin Signal Pin Signal
1D1+ 5D3-
2D1- - 6D2-
3D2+ 7D4+
4D3+ 8D4-
Fiber SFP Type LC
Figure 1-11. SFP Type LC connector.
Table 1-18. SFP Type LC connector pinout.
Pin Signal
1Data OUT
2Data IN
Power Supply
Figure 1-12. Power supply label..
Table 1-19. Power supply connector pinout.
Pin Signal
Inside VCC (+5 VDC)
Outside GND