Key Digital KD-PS42 User manual

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4K/18G Presentation Switcher with 4 Inputs (HDBaseT, 3x
HDMI), HDBaseT and HDMI Mirrored Outputs, Audio De-
Embed, CEC Display Control, Auto Switching. Includes Rx.
KD-App and KDPlug & Present™ Ready.

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Table of Contents
About KD-PS42 3
Quick Setup Guide 5
Connect 5
Configure 6
Control 10
Application Examples 12
Mounting Options 14
Connections, Buttons, and LEDs 15
System Integration with KD-CamUSB, KD-Amp220, KD-App 23
TCP/IP and RS-232 Commands 25
Specifications 30
Warranty Information 30
Product Warnings & Safety Instructions 31
Default IP Address: 192.168.1.239
Operation Manual
Please visit www.keydigital.com for the latest product documentation,
firmware, control drivers and software downloads. Product features and
specifications are subject to change without notice
Always follow the instructions provided in this Operating Manual.

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About KD-PS42
Key Digital® KD-PS42 is a 4K/18G KD-App Ready Presentation Switcher kit with CEC Manager™, auto
switching, and audio de-embedding creating a user-friendly, simplified presentation system. KD-PS42 features
three HDMI and one HDBaseT input which integrates natively with Key Digital wall plate HDBaseT transmitters.
Mirrored HDMI and HDBaseT outputs enable audience + presenter views and the HDBaseT output marries in
with the included KD-X40MRx for integrating monitors or projectors up to 40m / 131ft away when the selected
source is outputting 4K/UHD (up to 70m / 230ft at 1080p).
Designed for professional audio video installations in conference rooms, board rooms, classrooms, lecture
halls, auditoriums, and more, KD-PS42 enables multiple video sources to be displayed on up to two connected
displays while analog (balanced/unbalanced) and digital (PCM) audio de-embed ports feed audio of the
selected source into an amplifier, DSP, or sound bar. Integrating KD-PS42 with KD-AMP220 and KD-CAMUSB
will enable an app-ready all-in-one solution for control of video switching, sound and speech enforcement, and
PTZ camera control. Key Digital CEC Manager™ enables basic controls of the connected displays for a
simplistic all-in-one integration system. KD-PS42 presentation switcher supports all SD, HD, VESA and Ultra
HD/4K video standards with HDR header information included in a variety of 4K EDID handshakes. In addition
to IR, RS-232, and TCP/IP control, KD-PS42 can also be controlled via trigger voltage and features status
monitoring LEDs.
Key Features
•Presentation Switcher Kit: Presentation Switcher Kit: Includes KD-PS42 and KD-X40MRx. Add KD-
X2x1WDTx or KD-X2x1WVTx wall plate HDBaseT transmitter for plug-in on walls, floor and table boxes
•Presentation Switching: 3 HDMI, 1 HDBaseT source selection by push button, IP, RS-232, IR, auto
switching, or trigger control.
•Ultra HD/4K: Supports up to 4096x2160 or 3840x2160 24/25/30/60hz at 4:4:4 (signals up to 18Gbps
bandwidth)
•Auto-Sensing: Automatic selection of newly detected source and switching from newly disconnected
source when enabled
•CEC Manager™: Power, volume, and muting controls of the connected CEC supporting
display/projector without any additional control wiring. Selection of desired CEC command recipient.
•KD-App Ready: Network scan & detect populates pre-built GUI including connected display/projector
controls via CEC Manager™
•Ease of Integration: Complete configuration using Key Digital Management Software™ Pro
•Audio De-embedding: Audio of the selected source is de-embedded at the unit’s analog L/R
balanced/unbalanced and PCM digital audio connectors.

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•KD-AMP220 Control Mode: Command forward to KD-Amp220 for an all-in-one user-friendly control UI
of video switching, audio and speech enforcement
•PTZ USB Camera Integration: Add KD-CAMUSB for full PTZ control via KD-App. Use with KD-XUSB2
extender for USB signal extension over CAT5e/6.
•HDCP Licensing: Fully licensed and compatible with HDCP 2.2
•HDR10+ and Dolby Vision: More life-like images through a greater range of luminance levels
•Power Over HDBaseT: Rx unit (included) and wall plate Tx unit (sold separately) powered by KD-PS42
•Installation: Half-rack width with rack and under-table mounting ears included
•Signal Extension: For resolution and cable quality
o4K/UHD (18G): Up to 40m / 131ft
o1080p: Up to 70m / 230ft
•Deep Color Support: Up to UHD/4K 30Hz 4:4:4/12 bits or 60Hz 4:2:2/12 bit
•Full Buffer System™: Manages TMDS re-clocking / signal re-generation, HDCP authentication to
source & display, EDID Control handshake, and Hot Plug Detection Voltage
•EDID Management: Internal library with 15 internal EDID handshakes including 4K with HDR in addition
to native EDID data copied from the Rx display/device
•RS-232: Bi-Directional control to/from Tx and Rx/Presentation Switch unit
•Unit Control Mode: Provides TCP/IP and RS-232 control and status of/from Tx unit
•EDID Management: Internal library with 15 internal EDID handshakes including 4K with HDR in addition
to native EDID data copied from the output/display 1
•Digital Audio Format Support: DTS-HD Master Audio™, DTS:X®, Dolby® TrueHD, Dolby Atmos®
•Control System Support: Key Digital® App ready. Compass Control® Pro ready. Fully controllable by
all IR, RS-232, and TCP/IP supported control systems via open API.
Accessories
•Qty 1: Power supply (48V/1.66A, 80W)
•Qty 1: Remote control and battery set
(model KD-RMPS)
•Qty 2: Mounting bracket (L-Bracket)
•Qty 4: L-Bracket mounting screw
•Qty 1: Half-rack ear mount
•Qty 1: Short rack ear
•Qty 4: Rack Ear Screw
•Qty 1: RX Extender (model KD-X40MRx)
•Qty 2: Mounting bracket for KD-X40MRx (L-
Bracket)
•Qty 4: L-Bracket mounting screw for KD-
X40MRx
•Qty 1: 6-pin blue color terminal block plug
•Qty 1: 6-pin green color terminal block plug
•Qty 3: 2-pin green color terminal block plug
•Qty 1: 6ft Micro USB to USB A data cable
(USB 2.0)
•Qty 1: IR Emitter (3.5mm mono)
•Qty 1: IR Sensor (3.5mm stereo)

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Quick Setup Guide
Begin with the KD-PS42 unit, KD-X40MRx, Key Digital wall-plate transmitter (sold separately), all
input/output devices, and audio system powered off.
Connect
1. Connect HDMI sources to the input ports of KD-PS42 unit
2. (Optional) Connect HDMI and Display Port / VGA sources to wall-plate transmitter (sold separately)
3. Connect HDMI displays / projectors to KD-PS42’s HDMI output and the HDMI output port of the
KD-X40MRx unit
4. Connect CAT wire from KD-PS42’s HDBaseT outputs to KD-X40MRx HDBaseT input and (optional)
from KD-PS42’s HDBaseT input to wall-plate transmitter (sold separately)
5. Connect analog or digital audio to audio system
6. (Optional) Connect RS-232 wiring for Integrated System. If utilizing KD-AMP220 or KD-CAMUSB
integration control mode, connect RS-232 wiring from KD-UFS42 Unit Control TxD and Ground pins into
KD-AMP220 and KD-CAMUSB RxD and Ground. Using a stripped mono or stereo audio cable is
recommended, but other cables will work as well. See below diagram
7. Connect Control System. For KD-App control and/or IP control from a control system or PC, connect
TCP/IP port to network. For unit control, connect control system and/or PC to TCP/IP, RS-232, or place
IR emitter over IR sensor.
8. Connected monitors are controlled by CEC Manager™ on the HDMI connection.
a. Alternately, connect IR/RS-232 wiring from control system into pass-thru ports of KD-PS42 and
IR/RS-232 ports of the KD-X40MRx
9. Connect power. Screw-in power supply to the KD-PS42 unit, and then connect power to outlets.
10. Power on HDMI sources and displays

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Integrated Systems Wiring: KD-PS42 with KD-Amp220 and KD-CamUSB
Configure
Configure KD-PS42 with Key Digital Management Software Pro (KDMS Pro). Download HERE
1. Connect to KD-PS42 from your PC using the USB micro port on the face of the unit
2. Open the KDMS Pro software and perform a USB scan (fig. 1a). Choose “NO” and Start Scan when the
USB Device Scan prompt appears (fig. 1b
3. Choose the detected device from the Devices window (fig. 2a)
4. Set the desired Device Name in the KD-PS42 Information window (fig. 2b)
5. In the Network Settings section of the Properties window, enter the desired IP settings (fig. 2c)
a. IP Address (default is 192.168.1.239)
b. Subnet Mask (default is 255.255.255.0)
c. Gateway (default is 192.168.1.1)
d. Port (default is 23)
e. Note: If using KD-
App, please do
not change the
port number.
6. Save (fig. 2d)

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7. Set the EDID handshaking to position “A” for 4K video with 2ch audio. Choose setting “4” for 1080p
video with 2ch audio.
8. Refer to the Connections, Buttons, and LEDs section for more information on the remaining control
rotaries, slide switches, etc. Full access to all settings/commands is achieved via terminal session using
Tera Term or PuTTy software.

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Additional configuration steps for control by KD-App and KDMS Pro
9. Set the desired Input/Output names by entering the Input/Output Settings section of the properties
window, and selecting the Change Input/Output Name button (fig. 3a), selecting the desired input/output
and entering the name (fig. 3b)
10. If utilizing KD-CamUSB integration control mode, choose the quantity of cameras needed to control (fig
4a). Press Apply (fig 4b)
a. Note: Controlling more than two cameras will require the use of active third-party RS-232 signal
distribution. Maximum of seven cameras is supported.

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11. If utilizing KD-AMP220 integration control mode, choose the KD-AMP220 Control selection box (fig. 5a)
in the Audio/Video properties section. To control the mix level of KD-AMP220’s microphone input,
choose the selection box for Microphone Control (fig. 5b).
12. Your unit is now ready to control from the KDMS™ Control Panel, KD-App, or by professional control
system.

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Control
Option 1: Control via Remote Control
1. Output 1 display/projector control via CEC
2. Output 2 display/projector control via CEC
3. Input selection of KD-PS42 connected
sources
4. KD-CamUSB (sold separately) IR control
Option 2: Control via KD-App, KDMS Pro™
KD-PS42 is controllable by Key Digital’s user-friendly iOS App (downloadable in
the App Store) or Key Digital® Management Software™ (downloadable here).
1. Connect and Configure your KD-PS42 as described in this Connect &
Configure sections
2. Download and open KD-App and/or KDMS™
3. Ensure the iOS device and/or PC computer are on the same network with
KD-PS42
4. Perform a network scan in the KD-App/KDMS™
5. Select and control the selected KD-PS42

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Option 3: Control via professional control system
KD-PS42 allows control over serial interface for bi-directional communication.
•For RS-232 control use pins 4, 5, and
6 of the Unit Control port
•For TCP/IP control the default static IP
address is 192.168.1.239, with port 23
•For the past 10 years, most Key Digital matrix switches have supported a standard audio + video
switching command. KD-PS42 is also controllable by this command, so if you have previously integrated
Key Digital matrixes by third-party control systems you may have success using the same
driver/module.
a. Switching Video + Audio together (two commands supported)
i. SPO01SIyy yy = input number (01-05)
ii. SPOSIyy yy = input number (01-05)
b. Display CEC On / Off
i. SPOxxTVy xx = output number (01-02), y = ON or OFF
•See the TCP/IP and RS-232 Commands section for full command set.
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

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Application Examples
Complete Key Digital Presentation Solution
CEC Controlled Presentation Space

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Simple Conference Room / Hybrid Classroom
Lecture Hall with Wired and Wireless Presentation

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Mounting Options
KD-PS42 includes hardware for multiple mounting options.
•For mounting in a standard-width rack, use the included half-rack blank and short rack ear
•For mounting under table or on wall, use the included L brackets
•For mounting two units side by side in a standard-width rack, use KD-BKTHF (sold separately)

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Connections, Buttons, and LEDs
Inputs and EDID Handshaking Rotary
HDBaseT Port (Input 1):Using a CAT5e/6 cable, connect from a compatible KD Transmitter
• KD-X2x1WDTx –Wall plate transmitter with HDMI and Display Port inputs. Designed for installation in a US
dual-gang wall plate on wall, in a table or floor pocket.
• KD-X2x1WVTx –Wall plate transmitter with HDMI and VGA + L/R inputs. Designed for installation in a US
dual-gang wall plate on wall, in a table or floor pocket.
• 4K/UHD (18G): Up to 40m / 131 ft
• 1080p: Up to 70m / 230 ft
• Provides power over HDBaseT to connected transmitter
• Link light to the left of the port illuminates solid from healthy HDBaseT connectivity with Tx unit and
active incoming video signal.
• Does not support Dolby® Vision
HDMI (Input 2, 3 and 4): Using an HDMI cable, connect your HDMI sources.
•Supports up to UHD/4K @ 50/60 fps [4:4:4], 18Gbps
•Supports HDR10 and Dolby Vision
oDolby Vision only available through HDMI inputs & outputs, not HDBaseT.
•Compliant with HDCP 2.2 and previous
•Supports lossless compressed audio formats including Dolby® TrueHD, Dolby® Digital Plus, Dolby
Atmos®, and DTS-HD Master Audio™
•Does not support CEC pass through from connected Rx unit / presentation switch
•Link light to the left of each port illuminates when there is an active HDMI signal passing through.

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Supported standard 4K video formats:
EDID Handshaking Rotary
•EDID authentication is provided from the
unit to the connected inputs/sources.
•Inputs/sources connected to a KD
Transmitter receive their EDID
handshake from the KD Transmitter
•The EDID file (AKA “handshake” is
selected using the EDID rotary and
provides a list of compatible video and
audio formats as well as digital data,
informing the source device what it
should outputs.
•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

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Outputs
The HDMI and HDBaseT outputs are mirrored. The selected source is viewed on both outputs simultaneously.
HDMI (Output 1): Using an HDMI cable, connect your display or system. For DVI-D/DVI-I sources use an
appropriate adapter. For Display Port, use active adapters.
•Supports up to UHD/4K @ 50/60 fps [4:4:4], 18Gbps
•Supports HDR10
•Compliant with HDCP 2.2 and previous
•Supports lossless compressed audio formats including Dolby® TrueHD, Dolby® Digital Plus, Dolby
Atmos®, and DTS-HD Master Audio™
•Supports CEC Manager™ control of connected supporting display. Does not support CEC pass through.
•Link light to the left of port illuminates when there is HPD from the connected display.
HDBaseT (Output 2): Connect a CAT5e/6 cable to the Rx unit at the HDBaseT Input port.
•4K/UHD (18G): Up to 40m / 131 ft
•1080p: Up to 70m / 230 ft
•Use with included KD-X40MRx.
•Compatible with third party HDBaseT Rx, including projectors, but cannot be guaranteed.
•Provides power over HDBaseT to connected transmitter
•Link light to the left of the port illuminates solid from healthy HDBaseT connectivity with Rx unit.
•Does not support Dolby® Vision
Audio Outputs

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•Analog and digital de-embedded audio from the selected source
•There are no volume or tone control features
•There are no pre-amp features
Analog L/R Balance/Unbalanced
•6-pin terminal block
•Drives audio signals up to 2 VRMS with a sampling rate of 192HHz
•Automatically mutes if audio formatting is not PCM 2ch
•Pin assignment:
oLeft + is Pin 1; Left - is Pin 3; Left Ground is Pin 2
oRight + is Pin 4; Right - is Pin 6; Right Ground is Pin 5
PCM Digital
•RCA coaxial
•SPDIF IEC 60958 format
•Compatible with sampling rates up to 192KHz
•Supports multi-channel Dolby® surround formats up to 5.1 and DTV™ 6.1
•Automatically mutes if audio formatting is not PCM, Dolby®, or DTS™
Service USB Port
•Micro USB port
•Used for configuration and control from PC via KDMS Pro 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
unless adjusted otherwise

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Front Panel Buttons
Input Source (Blue)
•Used for selecting the desired source to be routed to both outputs.
•When an input source selection occurs, a Power On CEC command is sent to the display(s) enabled on
the Display Control button section
CEC Manager™ Display Control (Red)
•Choose the display that you desire CEC control commands be sent to
CEC Manager™ Commands (Green & Blue)
•Sends CEC commands via HDMI to the display(s) specified by the Display Control buttons.
•Ensure that CEC is enabled on your displays/projectors. Depending on the manufacturer, HDMI-CEC
may be given a different name. View THIS ARTICLE for a list of CEC names and how to enable CEC on
popular displays.
•With KD-Amp220 mode enabled, Mute, Vol +, and Vol -, buttons send RS-232 commands to the KD-
Amp220 instead of CEC commands to the displays(s)
•When Vol + or Vol –button is held, the command is sent every 0.5 second
•Pressing the A/V Mute button sends a black screen to the output. It is not a CEC command.
Note: Press and hold HDMI 1 + A/V Mute buttons simultaneously for 10 seconds to apply a factory default
reset. Release the buttons when all front LEDs turn off and the unit will re-boot.

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Unit Control Ports
Unit Control Phoenix Connector
•6-pin terminal block for Trigger In, IR and RS-232
•TCP/IP and RS-232 commands may be found in the TCP/IP & RS-232 Commands section
•Pinout:
oPin 1 = Trigger In
oPin 2 = IR In
oPin 3 = IR/Trigger Ground
oPin 4 = RS-232 Tx Data
oPin 5 = RS-232 Ground
oPin 6 = RS-232 Tx Data
TCP/IP Control Port
•Default static IP address is 192.168.1.239, port 23
•Connect an ether cable from the KD-PS42 to a network router or connect a straight through cable
directly from a PC
•Unit configuration, control, and firmware updates are achieved with Key Digital Management software
downloaded at www.keydigital.com
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