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Rack Mounting:

In addition to mounting with the supplied L-Brackets, multiple KD-S2x1X/KD-S4x1X may be mounted in 
KD-SMS16 using the side mounting screws.  KD-SMS16 is a mounting shelf for Key Digital units with side 
mounting screw spacing of 2.912”, 2.582”, or 2.252”

Do NOT exceed 12 units  as doing so will result in unit damage by overheating.

Front & Rear Panel Connections, Buttons, and LEDs

REAR PANEL

HDMI Inputs

 

The 2/4 HDMI inputs are located on the left side of the back panel. 

 

Blue LED illuminates solid to indicate an active HDMI signal is incoming. 

HDMI Output

 

1 HDMI located on the center to right side of the back panel. 

 

Blue LED illuminates solid when Hot Plug Detection (HPD) is received from the connected display/
output device 

Quick Setup Guide

CONNECT: 

Test for proper operation of the unit and cables in your system before permanently securing the 
unit for final installation.  Ensure that you leave enough ventilation space to provide sufficient 
airflow and cooling.

1. 

Begin with the KD-S2x1X/KD-S4x1X unit and all input/output devices turned off with power and 
CAT cables removed

2. 

Connect your HDMI sources to the input ports of KD-S2x1X/KD-S4x1X unit

3. 

Connect your HDMI display to the output port of KD-S2x1X/KD-S4x1X unit

4. 

BEFORE

 connecting power supply to power outlet, screw-in the power supply  

to the KD-S2x1X/KD-S4x1X unit

5. 

Connect the analog and/or digital audio amplifiers/receivers via the analog 3.5mm and optical outputs

6. 

After all connections are made, plug-in power supply to power outlet

7. 

Power on input and output devices

CONFIGURE:  

 

The default EDID handshake is 4Kx2K@60, 18G, HDR, 2ch audio.  Use the EDID rotary 
dial to choose the desired handshake that will be provided to the connected sources.  

CONTROL: 

 

Switch KD-S2x1X/KD-S4x1X via front panel button or IR remote. 

Application Example

Cable / Satellite

Sound Bar

Blu Ray

HDMI

HDMI

HDMI

HDMI

KD-S4x1X

Optical Audio

HDMI

Apple TV

HDMI Laptop

Note: 18Gbps signal extension requires all 18Gbps supported HDMI cables.

KD-S2x1_4x1X Manual.indd   2-3

3/20/19   11:00 AM

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