KD-S2x1X-2 - Router Key Digital - Free user manual and instructions

Brand	Key Digital
Model	KD-S2x1X-2
Product Type	Video Router / Switcher
Number of Inputs	2
Number of Outputs	1
Supported Resolution	Up to 4K@60Hz (4:4:4)
Video Bandwidth	18 Gbps
HDMI Standard	HDMI 2.0
HDCP Support	HDCP 2.2
Audio Support	Multi-channel digital audio (PCM, Dolby TrueHD, DTS-HD)
Power Supply	5V DC, 1A (external adapter)
Power Consumption	<2W
Dimensions (W x D x H)	3.9 x 2.4 x 0.8 inches (100 x 60 x 20 mm)
Weight	0.2 kg (0.44 lbs)
Control Method	Manual button, IR remote (optional)
Construction	Metal enclosure
Operating Temperature	32°F to 104°F (0°C to 40°C)
Warranty	3 years limited
Cleaning Instructions	Wipe with dry cloth; do not use liquids
Safety Compliance	CE, FCC, RoHS

Frequently Asked Questions - KD-S2x1X-2 Key Digital

How do I connect the KD-S2x1X-2?

Connect your HDMI sources to the two inputs, and connect the output to your display. Power on the device using the included 5V adapter.

Does it support 4K resolution?

Yes, the KD-S2x1X-2 supports resolutions up to 4K@60Hz with 4:4:4 chroma subsampling.

How do I switch between inputs?

Press the button on the front panel to toggle between input 1 and input 2. Alternatively, you can use an optional IR remote.

What power supply is required?

The device requires a 5V DC, 1A power adapter. An adapter is included in the package.

Why is there no signal on my display?

Check that all HDMI cables are securely connected. Ensure the source device is powered on. Try switching to another input. Also verify that your display supports HDCP 2.2 if using protected content.

Is HDCP 2.2 supported?

Yes, the KD-S2x1X-2 supports HDCP 2.2 for compatibility with 4K streaming devices and Blu-ray players.

Can I use this switcher for audio-only applications?

Yes, the switcher passes multi-channel digital audio, including PCM, Dolby TrueHD, and DTS-HD Master Audio.

What cables are included?

The package includes the switcher unit, a 5V power adapter, and a user manual. HDMI cables are not included.

How should I clean the device?

Disconnect power first. Use a dry, soft cloth to wipe the surface. Do not use any liquids or cleaning agents.

What is the warranty period?

Key Digital provides a 3-year limited warranty against defects in materials and workmanship.

USER MANUAL KD-S2x1X-2 Key Digital

Operating Instructions

Key digital Input Select Device/ RS-232 Output Active 1 2 OP SN Forced HPD ECD KD-S2x1X-2 HDMI Inputs 1 Model: KD-82x14-2 2 HDMI Output L/R Optical Audio Outputs Power 5V 2A

Key digital® Input Select Output Active 1 2 3 4 BT ON Forced HPD BDD KD-S4x1X-2 Model KD-S4x1X-2 HOME Inputs HOME Outputs L/R Optical Power — Audio Outputs — 5V 25.1A

Key digital®

Engineered for Your Success™

Table of Contents

Introduction 1

Quick Setup Guide 2

Application Example 2

Front & Rear Panel Connections, Buttons, and LEDs 3

IR Remote Control....8

RS-232 Commands & Protocol 9

Specifications 11

Important Product Warnings & Safety Instructions: 12

Contacting Key Digital ^® 13

Warranty Information.... 13

Visit product pages for most recent version of the manual, quick setup guide, firmware, control drivers and all additional downloads.

KD-S2x1X-2 KD-S4x1X-2

Always follow the instructions provided in this Operating Manual.

Note: Please visit www.keydigital.com for the latest product documentation and software downloads. Product features and specifications are subject to change without notice.

© 2022 Key Digital, Inc. All rights reserved.

Introduction

Key Digital® KD-S2x1X-2/KD-S4x1X-2 are 4K/18G HDMI switchers engineered to offer the best in quality, performance, and reliability, while providing a cost-effective HDMI switching solution. Designed for professional audio video installations in presentation, theater, and gaming spaces, KD-S2x1X-2/KDS4x1X-2 enables multiple video sources to connect to a single video display while L/R analog and Optical audio de-embed ports may be used to feed audio of the selected source into amplifiers, DSPs, or sound bars. Enable auto-switching to automatically select newly connected/powered sources or sequentially advance from the currently selected source when it is disconnected/powered off. KD-S2x1X-2/KD-S4x1X-2 HDMI switchers support all SD, HD, VESA and Ultra HD/4K video standards with HDR header information included in a variety of 4K EDID handshakes. The switchers feature push button and optical IR switching, status-monitoring LEDs, and support of HDR10, HDCP 2.2 and 4K.

Key Features

HDMI Switching: 2/4 HDMI sources to 1 HDMI output/display
Ultra HD/4K Support: 4096x2160 or 3840x2160 24/25/30/60hz at 4:4:4 (signals up to 18Gbps)
HDCP Licensing: Fully licensed and compatible with HDCP 2.2
HDR10 (High Dynamic Range): More life-like images through a greater range of luminance levels
Resolution Support: Supports all SD, HD, and VESA (VGA, SVGA, XGA, WXGA, SXGA, UXGA) up to 4096x2160p.
Deep Color Support: Up to UHD/4K 30Hz 4:4:4/12 bits or 60Hz 4:4:4/8 bit
Audio De-embedding: Audio of the selected HDMI input is output at the digital Optical and analog 3.5mm stereo connectors
Auto-Switching: Automatic selection of newly detected source and switching from newly disconnected source via hot plug detection voltage when enabled
Full Buffer SystemManages TMDS re-clocking / signal re-generation, HDCP authentication to source & display, and EDID Control handshake
EDID Management: Internal library with 15 internal EDID handshakes including 4K with HDR in addition to native EDID data copied from the output/display

Lossless Compressed Digital Audio: Dolby® TrueHD, Dolby® Digital Plus, DTS-HD Master Audio™, and Dolby® Atmos

CEC Pass-thru: From connected display to selected HDMI source

Control: Front panel button, optical IR, RS-232 via Micro USB Port and included adapter cable

Control System Support: Compass Control® Pro ready. Fully controllable by all IR, and RS-232 supported control systems via open API.

Included Accessories

Power Supply: SK01T-0500100Z 5V/1A DC power jack, screw-in type
IR Remote Control: KD-RMSWPROK
Mounting Brackets: 2 L-shaped
Control Cable: 6ft RS-232 3.5mm TRS to Micro USB, KD-S2X1XUSB2RS

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-2/KD-S4x1X-2 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-2/KD-S4x1X-2 unit
3. Connect your HDMI display to the output port of KD-S2x1X-2/KD-S4x1X-2 unit
4. BEFORE connecting power supply to power outlet, screw-in the power supply to the KD-S2x1X-2/KD-S4x1X-2 unit
5. Connect the analog and/or digital audio amplifiers/receivers via the analog 3.5mm and optical outputs
6. If connecting from control system or BrightSign player, connect supplied USB Micro to RS-232 adapter.
7. After all connections are made, plug-in power supply to power outlet
8. 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.

If Auto Switching is desired, enable via the IR remote or RS-232 command.

CONTROL:

Switch KD-S2x1X/KD-S4x1X via front panel button, IR remote or via RS-232.

Application Example

graph TD
    A["ACM+ TV"] --> B["HDMI"]
    C["Bus Ray"] --> D["HDMI"]
    E["Cable / Satellite"] --> F["HDMI"]
    G["HDMI Laptop"] --> H["HDMI"]
    B --> I["KD-S4x1X-2"]
    D --> I
    F --> I
    H --> I
    I --> J["4K"]
    K["Sound Bar"] --> J
    note["Note: 18Gbps signal extension requires all 18Gbps supported HDMI cables."]

Rack Mounting:

In addition to mounting with the supplied L-Brackets, multiple KD-S2x1X-2/KD-S4x1X-2 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"

Front and side views of a server rack unit (no visible text or labels)

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 HDMI Outlet Audio Outputs Mega HD GATE 2

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 Inputs 1 2 3 4 HDMI Output Model 40-Select Control LIF Audio Outputs Control

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

HDMI Input/Output Port Specifications

Supports up to UHD/4K @ 50/60 fps [4:4:4], 18Gbps signals
See Supported standard 4K Video Formats table
Supports HDR10
Compliant with HDCP 2.2 and previous
Supports lossless compressed audio formats including DolbyTrueHD, Dolby® Digital Plus, Dolby Atmos®, and DTS-HD Master Audio™
CEC pass-through to selected HDMI source
For Display Port sources/monitors, use active converters

Supported standard 4K Video Formats:

Resolution Bandwidth
1 4K@24/25/30 [4:4:4] 8bit < 10.2Gbps
2 4K@24/25/30 [4:2:2] 8/10/12bit < 10.2Gbps
3 4K@50/60 [4:2:0] 8bit < 10.2Gbps
4 4K@24/25/30 [4:4:4] 10/12bit < 18Gbps
5 4K@50/60 [4:2:2] 8/10/12bit < 18Gbps
6 4K@50/60 [4:2:0] 10/12bit < 18Gbps
7 4K@50/60 [4:4:4] 8bit < 18Gbps

I/O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

Analog L/R Audio Output

3.5mm stereo jack with de-embedded audio from the selected HDMI source
Automatically mutes if audio formatting is not PCM 2ch

1 2 3 4 HDMI Inputs HDMI OUTPUT LTR Open Active Output S/O Media

Optical Audio Output

Optical audio output with de-embedded audio from the selected HDMI source
SPDIF IEC 60958 format
Supports multi-channel Dolbyand DTS™ surround formats up to 5.1
Automatically mutes if audio formatting is not PCM, DoFbyor DTS"

Audio Ports Specifications

Each audio output drives audio signals up to 2VRMS with a sampling rate of 192KHz

There are no volume or tone control features

There are no DSP features

Audio Input Signal Format	Audio L/R Output	Digital Audio Output (Optical)
2ch PCM Pass-Through Pass-Though
Multi-Channel PCM	Front L/R Pass-Through	MUTE
Dolby DTS	MUTE	Pass-Though
HD Audio	MUTE	MUTE

FRONT PANEL

Key digital Input Select ISO 1.0 C:\Program Files\1.0\2.0\3.0\4 Control H/O ISO KD-S4x1X-2

Input Select button

• Used to choose which connected source is output to the connected display/device
  Selecting a source with the Input Select button or IR remote will disable Auto Sensing Mode
  To factory reset the unit, press and hold for approx. 10 seconds until the front LEDs blink twice

Key digital® Input Select Output Mode Forward HPD EDO KD-S4x1X-2

Output Active LED

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

Key digital Input Select Output Active 1 2 3 4 Forward/HPD EDD KO-S4x1X-2

Micro USB port

- Used for configuration and control from PC via KDMS™ Pro, KDMS, or third-party control terminal - Used for firmware updates (consult with Key Digital tech support before updating firmware)

»Supports USB driver for Windows 10, 7, XP, Mac, Linux

» Will register as "Prolific USB-to-Serial Comm Port in Device Manager
*Can be used as RS-232 control port. Baud rate is 57,600.
*Use included 3.5mm TRS to Micro USB cable:

< 3.5mm Stereo Plug > GND TxD RxD 1.83M (6FT) Micro USB-B Plug > 1 2 - TxD 3 - RxD 5 (6ND) Brightsign Player - XT1144

Key digital Input Select Current Active 1 2 3 4 Forward FDS KD-S4x1X-2

Forced HPD Troubleshooting Tool

» When ON, Hot Plug Detection voltage is fixed on to the connected display

*Standard HPD behavior when set to OFF position

Key digital Input Select ISO 34x1X-2

IR Sensor

»Used to collect line-of-sight IR from remote control
*Receives signals from a 90° angle at up to 30ft away.
» Mount an IR emitter from Compass Control Pro or to control by another professional control system

Key digital Input Select Output Active 1 2 3 4 Control HFD KD-S4x1X-2

EDID Handshaking Rotary

- EDID authentication is provided from the unit to the connected inputs/sources.

The EDID file (AKA "handshake") is selected using the EDID rotary on the unit and provides a list of compatible video and audio formats as well as digital data, informing the source device what it should output.
Most sources will comply with a new EDID file without a power-cycle, but devices do behave differently

•Adjustments may speed up sync time during source selection.

Position EDID Handshake Description EDID Rotary

0	Copy EDID from HDMI Output	Note: Default position is "A"
1	1320x1080p, 2CH AUDIO
2	1320x 1080p, DOLBY/DTS 5.1
3	1320x 1080p, HD AUDIO
4	1320x 1200p, 2CH AUDIO
5	1920x 1200p, DOLBY/DTS 5.1
6	1320x 1200p, HD AUDIO
7	4Kx2K@60, 10.2G, HDR, 2CH AUDIO
8	4Kx2K@60, 10.2G, HDR, DOLBY/DTS 5.1
9	4Kx2K@60, 10.2G, HDR, HD AUDIO
A	4Kx2K@60, 18G, HDR, 2CH AUDIO
B	4Kx2K@60, 18G, HDR, DOLBY/DIS 5.1
C	4Kx2K@60, 18G, HDR, HD AUDIO	IMPORTANT: Please apply light pressure to the EDID rotary when making your selection.
D	1280x720p@60 DWI
E	1920x1080p@60 DWI
F	1920x1080l, 2CH AUDIO

Note: Default position is "A"
IMPORTANT: Please apply light pressure to the EDID rotary when making your selection.

IR Remote Control

Model: KDRMSWPROK (uses CR2025 battery). Please note that some remote buttons may have no functionality.

Discreet Power On and Off Auto Switching Toggle Device Select (used for addressing mode) Power New digital Input 1 2 3 4 Auto Device Select 1 2 3 5 6 7 8 9 0 Discreet Input Select Incremental Input Select R1, R2, R3 (Reserved)

Auto Switching Mode

When enabled, a newly detected active source is automatically selected.
If current source is disconnected or becomes inactive, switch sequentially advances to an active input/source.
Manual source selection via push-button, IR, or RS-232 is still possible when enabled.
Auto Switching mode is only disabled via IR or RS-232. It is not disabled via manual source switching/selection.

RS-232 Commands & Protocol

KD-S2x1X-2 / KD-S4x1X-2 allow control over serial interface for bi-directional communication.

Use the included 3.5mm TRS to Micro USB cable to control from your control system or BrightSign player.

Connection Protocol:

Baud Rate = 57,600 bits per second
Data Bits = 8, Stop Bits = 1

Parity = Non, Flow Control = None
Carriage Return: Required at end of string

Notes:

Commands are not case-sensitive

Spaces are shown for clarity; commands should NOT have any spaces

After a new command is received, a prompt should be sent back

KD-S2x1X-2 Help Command (H). Returns entire API in readable format:

KB-S2x1X-2> H

--	Key Digital Systems HELD
--	KD-52x1X-2	F/W version : 1.01
--		--
--	F : Help	--
--	STA : Show Global System Status	--
--		--
--	Video Output Setup Commands: yy = [01-02,U,D]	--
--	SPC S2 yy : Set Output to Video Input yy	--
--	SPC1 ST yy : Set Output to Video Input yy	--
--		--
--	System Control Setup Commands:	--
--	SPC A3 x : Set Auto Sensing Mode x = [0=OFF,:=OX] --
--	SPC FB F/D : Enable/Disable Front Input Select Button	--

KD-S2x1X-2 Status Command (STA). Returns unit status and settings in readable format:

KD-S2×1X-2>STA

Key Digital Systems STATUS
KD-82x1X-2	P/W Version : 1.01
-- Front Input Select Button : Enabled	--
-- Auto Sensing Kode : OFF	--
-- Video Input 01 : EDID = DEFAULT A, LINK = ON	--
-- Video Input 02 : EDID = DEFAULT A, LINK = OFF	--
-- Video Output : Input - 01, LINK - ON , RPD - OFF	--

KD-S4x1X-2 Help Command (H). Returns entire API in readable format:
KD-S4x1X-2> 1 -- Key Digital Systems HELP -- F/W Version : 1.01 -- -- -- -- E : Help -- STA : Show Global System Status -- -- -- -- -- Video Output Setup Commands: yy - [01-04, U, D] -- SPO SI yy : Set Output to Video Input yy -- SPOC1 SI yy : Set Output to Video Input yy -- -- -- -- -- System Control Setup Commands: -- SPC A5 x : Set Auto Sensing Mode x - [C-OFF, I-ON] -- -- SPC P3 2/D : Enable/Disable Front Input Select Button --

KD-S4x1X-2 Status Command (STA). Returns unit status and settings in readable format:
KD-54x1X-2> STA -- Key Digital Systems STATUS -- -- KD-54x1X-2 F/W Version : 1.01 -- -- Front Input Select Button : Enabled -- -- Auto Sensing Mode : OFF -- -- -- Video Input 01 : EDID = DEFAULT A, LINK = ON -- -- Video Input 02 : EDID = DEFAULT A, LINK = OFF -- -- Video Input 03 : EDID = DEFAULT A, LINK = ON -- -- Video Input 04 : EDID = DEFAULT A, LINK = OFF -- -- -- Video Output : Input = 31, LINK = ON , EPD = OFF -- --

Specifications

Technical:

Input (Each): HDMI Connector, Type A, 19 Pin Female
Output: HDMI Connector, Type A, 19 Pin Female
Bandwidth: TMDS bandwidth 18 Gbps
DDC Signal (Data): Input DDC Signal - 5 Volts p-p (TTL)

HDMI Video/Audio Signal: Input Video Signal - 1.2 Volts p-p

Power Supply: SK01T-0500100Z 5V/1A DC power jack, screw-in type

General:

Regulation: CE, RoHS, WEEE
Enclosure: Black Metal
Product: »KD-S2x1X-2 - 5.8 x 3.5 x 0.8" (147 x 90 x 20mm), 0.8 lb »KD-S4x1X-2 - 7.7 x 3.5 x 0.8" (197 x 90 x 20mm), 0.9 lb
Packaging: »KD-S2x1X-2 - 8.3 x 5.6 x 3.1" (210 x 144 x 80mm), 1.2 lb »KD-S4x1X-2 - 9.4 x 5.6 x 3.1" (240 x 144 x 80mm), 1.3 lb

1218

▲ Important Product Warnings:

1. Connect all cables before providing power to the unit.

2. Test for proper operation before securing unit behind walls or in hard to access spaces.

3. If installing the unit into wall or mounting bracket into sheet-rock, provide proper screw support with bolts or sheet-rock anchors.

Safety Instructions:

Please be sure to follow these instructions for safe operation of your unit.

1. Read and follow all instructions.

2. Heed all warnings.

3. Do not use this device near water.

4. Clean only with dry cloth.

5. Install in accordance with the manufacturer's instructions.

6. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

7. Only use attachments/accessories specified by the manufacturer.

8. Refer all servicing to qualified service personnel. Servicing is required when the device has been damaged in any way including:

»Damage to the power supply or power plug

»Exposure to rain or moisture

Power Supply Use:

You MUST use the Power Supply PROVIDED with your unit or you VOID the Key Digital® Warranty and risk damage to your unit and associated equipment.

Contacting Key Digital®

Technical Support

For technical questions about using Key Digital ^® products, please contact us at:

Phone: [phone]
E-mail: [e-mail]

Repairs and Warranty Service

Should your product require warranty service or repair, please obtain a

Key Digital® Return Material Authorization (RMA) number by contacting us at:

Phone: [phone]
E-mail: [e-mail]

Warranty Information

All Key Digital® products are built to high manufacturing standards and should provide years of trouble-free operation. They are backed by a Key Digital Limited 3 Year Product Warranty Policy. http://www.keydigital.com/warranty.htm

Black-and-white portrait of a man with glasses and mustache, looking upward (no text or symbols visible)

Key Digital ^® , led by digital video pioneer Mike Tsinberg, develops and manufactures high quality, cutting-edge technology solutions for virtually all applications where high-end video and control are important. Key Digital ^® is at the forefront of the video industry for Home Theater Retailers, Custom Installers, System Integrators, Broadcasters, Manufacturers, and Consumers.