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quickstart guide 

DM-TX-401-S/DM-TX-401-S2

www.crestron.com

888.273.7876

201.767.3400

Specifications subject to 

change without notice.

DM-TX-401-S/DM-TX-401-S2

QUICKSTART DOC. 7258B (2031811)    11.12

DigitalMedia 8G™ Fiber Transmitter 401

Mounting the DM-TX-401-S/

DM-TX-401-S2

● 

DISPLAY PORT:

  Using a DisplayPort cable 

(not included), connect the 

DISPLAY PORT

 

to a DisplayPort audio/video source.

● 

DM OUT MMF/SC Port:

  (DM-TX-401-S 

only) Using CRESFIBER8G, CRESFIBER, 

  CRESFIBER-SINGLE-SC, or generic OM3 

fiber optic cable (not included), connect the 

DM OUT MMF/SC

 port to the DM 8G

®

 fiber 

input of a DM

®

 switcher, receiver/room 

controller, or other DM device.

● 

DM OUT SMF/LC Port:

  (DM-TX-401-S2 

only) Using CRESFIBER8G-SM or generic 

G.652.D (or better) single-mode fiber optic 

cable (not included), connect the 

DM OUT 

SMF/LC

 port to the DM 8G SMF input of a 

DM switcher, receiver/room controller, or 

other DM device. For DM 8G SMF wiring, 

the maximum transmission distance is 7.5 

miles (12 km).

● 

LAN Port: 

 Using an Ethernet cable (not 

included), connect the 10BASE-T/

  100BASE-TX 

LAN

 port to a local network 

device.

● 

Ground: 

 Connect the chassis ground lug to 

earth ground (building steel).

● 

24 VDC Power:

  Connect the 

24 VDC

 

power jack to the external power pack 

included with the transmitter.

1

For details, refer to the latest version of the 

DM-TX-401-S/S2

 

Operations and Installation Guide, Doc. 7257. 

NOTE:

  For DigitalMedia 8G™ fiber 

wiring, CRESFIBER8G is 

recommended. Using CRESFIBER8G, 

the maximum transmission distance is 

1000 feet (~300 meters). Using 

CRESFIBER/CRESFIBER-SINGLE-SC 

or generic OM3 fiber optic cable, the 

maximum transmission distance is 500 

feet (~150 meters).

Connections in a Sample DM-TX-401-S Application

Mount the transmitter in the desired location 

(for example, in a stationary rack or podium, 

on a shelf, or in a movable lectern or AV cart). 

If rack mounting is desired, use the ST-RMK 

Rack Mount Kit (sold separately). For rack 

mounting instructions, refer to the latest 

version of the Rack Mount Kit: ST-RMK 

Installation Guide (Doc. 5664), which is 

available from the Crestron

®

 Web site 

(www.crestron.com/manuals).

2

Connect the transmitter as required for the 

application. Rear panel connections consist of 

the following:
● 

AUDIO IN TRS Port:

  Using an unbalanced 

3.5 mm TRS mini phone jack cable (not 

included), connect the 

AUDIO IN

 TRS port 

to an unbalanced audio source.

● 

Dual AUDIO IN RCA Ports:

  Using a 

dual-channel RCA stereo audio cable (not 

included), connect the 

AUDIO IN L

 and 

R

 

ports to an unbalanced audio source.

● 

COM Port: 

 Using a data communications 

cable (not included), connect the 5-pin 

COM

 terminal block to the device to be 

controlled using RS-232 communication.

● 

IR Port:

  Using the Crestron IRP2 emitter 

(not included), connect the 2-pin 

IR

 terminal 

block to the IR input port of the device to be 

controlled.

● 

VID Port:

  Using an RCA video cable (not 

included), connect the 

VID

 port to a 

composite video source.

● 

PC Port:

  Using a VGA cable (not 

included), connect the 

PC

 port to an RGB, 

component, S-video, or composite video 

source.

● 

HDMI Port:

  Using an HDMI

®

 cable (not 

included), connect the 

HDMI

 port to an 

HDMI audio/video source.

NOTE:

  Apply power after all 

connections have been made.

1

Connecting the DM-TX-401-S/

DM-TX-401-S2

In addition, the front panel provides a 

USB HID

 

port. Using a USB cable (not included), connect 

the 

USB HID

 port to a keyboard/mouse.

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