Specifications

Crestron DM-MD8X8/16X16/32X32 DigitalMedia Switchers

Operations Guide – DOC. 6755D DigitalMedia Switchers: DM-MD8X8/16X16/32X32

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24 A B G Port Wiring

PIN SIGNAL DESC. WIRE COLOR

24 +24V DC Power Red

A DM-Net+ DMNet Orange

B DM-Net- DMNet Grey

G GND DC Ground Black

NOTE: Do not untwist the two wires in a single pair for more than 1/3-1/2”

(8-12 mm) when making a connection. The twists are critical to canceling out

interference between the wires.

The maximum transmission distances between repeaters are determined by the video

resolution sent over the wires. The total distance that video can be sent using

repeaters is shown in the following table for DigitalMedia cable. While up to three

repeaters may be used to extend the transmission distance, the aggregate length of a

cable run must not exceed 450 feet (137.1 meters) when using DigitalMedia cable.

The following table shows the maximum cable lengths allowed between repeaters

when using DigitalMedia cable.

Maximum Resolution and Cable Length

Cable Type: DM-CBL DigitalMedia Cable

Resolution:

Maximum length

without, between,

before or after

repeaters

Maximum total

length using up

to 2 repeaters

720p, 1080i, 1080p24 200 ft (60 m)

450 ft (137 m)

1024x768 @ 75 Hz 200 ft (60 m) 450 ft (137 m)

1080p60 150 ft (45 m) 450 ft (137 m)

1280x1024 @ 75 Hz 150 ft (45 m) 450 ft (137 m)

1920x1200 @ 60 Hz 150 ft (45 m) 450 ft (137 m)

1600x1200 @ 60 Hz 125 ft (38 m) 375 ft (114 m)

1080p60 Deep Color 100 ft (30 m) 300 ft (91 m)

NOTE: 1080p60 is the most common resolution used in residential installations.

NOTE: Deep color is part of the HDMI specification. It allows devices to transmit

video using 36 bits per pixel instead of 24 bits per pixel. The color depth allows for

4096 shades each of red, green, and blue (instead of 256). Due to bandwidth

requirements and limited support, deep color is not often used.

Up to two repeaters can be used to extend the transmission distance between the DM

switcher and the Room Controller. The following diagram illustrates the maximum

hop length between switcher/room controller and repeaters and maximum aggregate

cable length.