Kramer SWT3-41-H User manual

P/N: 2900-301680 Rev 1 www.kramerav.com
USER MANUAL
MODELS:
SWT3-41-H 4x1 4K Auto Switcher
SWT3-21-H 2x1 4K Auto Switcher

Kramer Electronics Ltd.
SWT3 21 H, SWT3-41-H –Contents
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Contents
Introduction 1
Getting Started 1
Overview 2
Typical Applications 3
Defining SWT3-41-H and SWT3-21-H 4
SWT3 21 H, SWT3-41-H / Front Panel 4
SWT3 21 H, SWT3-41-H Rear Panel 5
Mounting SWT3-41-H/SWT3-21-H 6
Connecting SWT3-21-H 7
Connecting Output to a Balanced/Unbalanced Stereo Audio Acceptor 8
Connecting to SWT3-41-H via RS-232 8
Operating and Controlling SWT3-41-H 9
Principles of Operation 9
Using Front and Rear Panel Buttons 11
Operating via Ethernet 11
Using Embedded Web Pages 15
Operation 17
Settings 19
Setting Device Properties 22
Setting Control Gateway Properties 28
Diagnostics 39
Administration 40
Viewing the About Page 44
Technical Specifications 45
Default Communication Parameters 46
Default EDID 46
Protocol 3000 49
Understanding Protocol 3000 49
Protocol 3000 Commands 50
Result and Error Codes 65

Kramer Electronics Ltd.
Introduction
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Introduction
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been providing a world
of unique, creative, and affordable solutions to the vast range of problems that confront the
video, audio, presentation, and broadcasting professional on a daily basis. In recent years, we
have redesigned and upgraded most of our line, making the best even better!
This user manual describes SWT3-41-H and SWT3-21-H. These devices are identical except
for the number of their inputs. Note that whenever SWT3-41-H is used in the user manual, it
also refers to SWT3-21-H, unless specified otherwise. (A device is named specifically only
when a device-specific feature is described).
Getting Started
We recommend that you:
•Unpack the equipment carefully and save the original box and packaging materials for possible
future shipment.
•Review the contents of this user manual.
Go to www.kramerav.com/downloads/ SWT3-41-H or
www.kramerav.com/downloads/SWT3-21-H to check for up-to-date user manuals,
application programs, and to check if firmware upgrades are available (where appropriate).
Achieving Best Performance
•Use only good quality connection cables (we recommend Kramer high-performance,
high-resolution cables) to avoid interference, deterioration in signal quality due to poor
matching, and elevated noise levels (often associated with low quality cables).
•Do not secure the cables in tight bundles or roll the slack into tight coils.
•Avoid interference from neighboring electrical appliances that may adversely influence signal
quality.
•Position your Kramer SWT3-41-H away from moisture, excessive sunlight and dust.
Safety Instructions
Caution:
•This equipment is to be used only inside a building. It may only be connected to other
equipment that is installed inside a building.
•For products with relay terminals and GPI\O ports, please refer to the permitted rating
for an external connection, located next to the terminal or in the User Manual.
•There are no operator serviceable parts inside the unit.

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Introduction
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Warning:
•Use only the power cord that is supplied with the unit.
•To ensure continuous risk protection, replace fuses only according to the rating
specified on the product label which is located on the bottom of the unit.
Recycling Kramer Products
The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC aims to reduce
the amount of WEEE sent for disposal to landfill or incineration by requiring it to be collected
and recycled. To comply with the WEEE Directive, Kramer Electronics has made
arrangements with the European Advanced Recycling Network (EARN) and will cover any
costs of treatment, recycling and recovery of waste Kramer Electronics branded equipment on
arrival at the EARN facility. For details of Kramer’s recycling arrangements in your particular
country go to our recycling pages at www.kramerav.com/il/quality/environment.
Overview
SWT3-41-H and SWT3-21-H are intelligent (4x1 and 2x1, respectively) automatic switchers
for 4K60 4:4:4 HDMI video signals with plug and play user experience such as priority or
last−connected auto-switching based on active video signal detection, and easy remote IP-
driven management and control.
SWT3-41-H and SWT3-21-H provide exceptional quality, advanced and user-friendly
operation, and flexible control.
Exceptional Quality
•Auto Switcher Ease of Use —Automatically plays the switched source signal on the connected
display according to user–configured preferences, such as priority or last–connected input.
When the user manually switches, by pressing a button, the auto switching is overridden.
•HDMI Signal Switching —HDCP 2.2 compliant, supporting deep color, x.v.Color™, CEC, lip
sync, HDMI uncompressed audio channels, Dolby TrueHD, DTS–HD, 2K, 4K, and 3D as
specified in HDMI 2.0.
•I–EDIDPro™Kramer Intelligent EDID Processing™—Intelligent EDID handling, processing,
locking and pass–through algorithm ensures plug & play operation for HDMI source and
display systems.
•Multi–channel Audio Switching —Up to 32 channels of digital stereo uncompressed signals for
supporting studio–grade surround sound.
•Audio De-embedding –The digital audio signal passing-through to the HDMI output, is de-
embedded, converted to an analog signal and sent to the stereo balanced analog audio output.
This enables playing the audio on a locally connected professional audio system (such as
DSP) and speakers, in parallel to playing it on the speakers connected to the AV acceptor
device (such as TVs with speakers).
Advanced and User-friendly Operation
•Simple and Flexible Control - Remote IP−controller connection, browser operation webpage,
local panel buttons, and remotely connected contact−closure buttons triggering configurable

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Introduction
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operation functions, for easy and fully flexible user ports selection, signals routing, and
switcher control.
•Display On/Off Operation —Meeting presentation is simplified by manually or automatically
turning ON/OFF a CEC–enabled or serially-controlled display when the presentation source is
plugged in / unplugged with user–defined shut–down delay.
•Comprehensive Unit Control and Configuration Options –Local control via volume and mute
panel buttons, and volume and mute contact closure switches. Distance control via user-
friendly embedded web pages via the Ethernet, Protocol 3000 API commands via RS-232
serial communication transmitted by a PC, touch screen system or other serial controller.
Flexible Connectivity
•Built-in Intelligent Control Gateway - Remote IP−driven intelligent control of connected HDMI
and sensor devices via RS−232 or I/O. Eliminating the need for an external control gateway,
this feature reduces installation complexity and costs, to enable easy integration with control
systems, such as Kramer Control.
•Secured Operation –Standard IT-grade 802.1x authentication for secured IT LAN connectivity
operation.
•Easy Installation –PoE powering via LAN port connection, and compact DemiTOOLS® fan-
less enclosure for user-reachable table mounting, or side-by-side mounting of 2 units in a 1U
rack space with the recommended rack adapter.
Typical Applications
SWT3-41-H & SWT3-21-H is ideal for the following typical applications:
•Intelligent, high-quality auto switcher for any corporate or educational AV meeting solution.
•Controllable and manageable switching building-block for tailor-made meeting and training
solutions.

Kramer Electronics Ltd.
Defining SWT3-41-H and SWT3-21-H
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Defining SWT3-41-H and
SWT3-21-H
This section defines SWT3-41-H and SWT3-21-H front and rear panels.
SWT3 21 H, SWT3-41-H / Front Panel
Figure 1: SWT3-41-H Auto Switcher Front Panel
Figure 2: SWT3-21-H 4x1 4K Auto Switcher Front Panel
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Feature
Function
IN Buttons
Press to select an HDMI input (LED button lights orange). (2 for
SWT3-41-H, 4 for SWT3-21-H).
DISPLAY ON Button
Press to turn display On (LED button lights orange) or Off.
VOL Push
Buttons
-
Press to decrease audio output volume.
+
Press to increase audio output volume.
MUTE
Push Button
Press to MUTE and press again to UNMUTE
LED
Lights red when audio output is muted.
NET LED
LED Status
Indicates
Dark
No IP address acquired.
Lights green
A valid IP address has been
acquired.
Flashes green for 60s
A means to identify the device in a
system, using command #IDV.
Flashes red/green
IP fallback address has been
acquired.
STATUS LED
LED Status
Indicates
Dark
Power is off
lights white
PSU-powered on (only).
Note: This is applicable when
power supply is PoE mode.
Lights green
Power is on and an active source
and acceptor are connected.
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2
3
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5
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Defining SWT3-41-H and SWT3-21-H
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Lights blue
Power is on and an active source
is connected.
SWT3 21 H, SWT3-41-H Rear Panel
Figure 3: SWT3-41-H Auto Switcher Rear Panel
Figure 4:SWT3-21-H 4x1 4K Auto Switcher Rear Panel
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Feature
Function
HDMI IN Connectors
Connect to an HDMI source (2 for SWT3-41-H, 4 for SWT3-21-H).
HDMI OUT Connector
Connect to an HDMI acceptor.
AUDIO OUT 5-pin Terminal
Block Connector
Connect to a balanced stereo audio acceptor.
Terminal block Connector
(S1-S6)
Connect to:
•Input-triggering devices (for example, remote buttons or sensors),
OR
•Output-triggered devices (for example, remote alarm LED
indication).
These GPIO ports may be configured as a digital input, digital output, or analog
input ports.
ETHERNET RJ-45
Connector
Connect to LAN to accept power, control and manage the device.
RESET Recessed Button
For restoring factory default settings, press the RESET button and
connect power to device (keep pressing longer than 6sec after power
connection)
5V DC Power Connector
Connect to the power supply and to the mains electricity.
RS-232 3-pin Terminal
Block Connector
Connect to an RS-232 controller.
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12
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Mounting SWT3-41-H/SWT3-21-H
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Mounting SWT3-41-H/SWT3-21-H
This section provides instructions for mounting SWT3 21 H, SWT3-41-H. Before installing,
verify that the environment is within the recommended range:
•Operation temperature –0to 40C (32 to 104F).
•Storage temperature –-40to +70C (-40 to +158F).
•Humidity –10% to 90%, RHL non-condensing.
Caution:
•Mount SWT3-41-H before connecting any cables or power.
Warning:
•Ensure that the environment (e.g., maximum ambient temperature & air flow) is
compatible for the device.
•Avoid uneven mechanical loading.
•Appropriate consideration of equipment nameplate ratings should be used for avoiding
overloading of the circuits.
•Reliable earthing of rack-mounted equipment should be maintained.
•Maximum mounting height for the device is 2 meters.
Mount SWT3-41-H in a rack:
•Use the recommended rack adapter
(see www.kramerav.com/product/ SWT3-41-H / www.kramerav.com/product/SWT3-21-H).
Mount SWT3-41-H on a surface using one of the following
methods:
•Attach the rubber feet and place the unit on a flat surface.
•Fasten a bracket (included) on each side of the unit and attach it to a flat
surface. For more information go to www.kramerav.com/downloads/
SWT3-41-H / www.kramerav.com/downloads/SWT3-21-H.

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Connecting SWT3-21-H
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Connecting SWT3-21-H
Since the main difference between SWT3-41-H and SWT3-21-H are the number of inputs,
from this section on, any description of SWT3-41-H applies also to SWT3-41-HSWT3-21-H,
unless stated otherwise.
Always switch off the power to each device before connecting it to your SWT3-41-H. After
connecting your SWT3-41-H, connect its power and then switch on the power to each device.
Figure 5: Connecting to the SWT3-41-H Rear Panel
To connect SWT3-41-H as illustrated in the example in Figure 5:
1. Connect an HDMI source to the HDMI IN connectors for example, Connect:
▪A laptop to HDMI IN 1.
▪A desktop PC to HDMI IN 2.
▪Document Camera to HDMI IN 3.
▪A Set top box to HDMI IN 4.
2. Connect HDMI OUT to an HDMI acceptor (for example, a display).
3. Connect AUDIO OUT to a balanced stereo audio acceptor (for example,
Kramer Tavor 5-O active speakers).
4. Connect remote contact-closure buttons to I/O terminal block connectors , and
configure buttons function, for example to select an input (see Configuring I/O (GPIO)
Ports on page 32).
5. To serially control the display, connect the RS-232 port to the display.
▪Send serial commands from LAN-connected Kramer controller (for example SL-
240C) to the display via control gateway.
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8
9
10
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Connecting SWT3-21-H
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Connecting Output to a Balanced/Unbalanced Stereo
Audio Acceptor
The following are the pinouts for connecting the output to a balanced or unbalanced stereo
audio acceptor:
Figure 6: Connecting to a Balanced Stereo Audio
Acceptor
Figure 7: Connecting to an Unbalanced Stereo Audio
Acceptor
Connecting to SWT3-41-H via RS-232
You can connect to SWT3-41-H via an RS-232 connection using, for example, a PC.
SWT3-41-H features an RS-232 3-pin terminal block connector allowing the RS-232 to
control SWT3-41-H.
Connect the RS-232 terminal block on the rear panel of SWT3-41-H to a PC/controller, as
follows:
From the RS-232 9-pin D-sub serial port, connect:
•Pin 2 to the TX pin on the SWT3-21-H RS-232 terminal block.
•Pin 3 to the RX pin on the SWT3-21-H RS-232 terminal block.
•Pin 5 to the G pin on the SWT3-21-H RS-232 terminal block.
RS-232 Device SWT3-41-H
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Operating and Controlling SWT3-41-H
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Operating and Controlling
SWT3-41-H
Principles of Operation
This section covers the following topics:
Flexible SWT3-41-H Auto Switching Policy on page 9.
Routing IP-Driven Control Signals via Built-in Control Gateway on page 10.
Flexible SWT3-41-H Auto Switching Policy
Set the switching policy to:
•Manual –Select an input manually and switching occurs whether a live signal is present
on the input or not.
•Auto –Auto Switching selection is performed in either Last Connected or Priority policy.
In Last Connected policy, if the signal on the current input is lost, SWT3-41-H automatically
selects the last connected input. The auto-switching delay depends on the configurable
signal-lost timeout.
In Priority policy, when the input sync signal is lost for any reason, the input with a live signal
and next in priority is selected automatically. The auto-switching delay depends on the
configurable signal-lost timeout. Inputs priority is configurable; the default setting is HDMI 1
HDMI 2 HDMI 3 HDMI 4.
In both Last Connected and Priority modes, manually selecting an input (using the front
panel, remote or web UI input select button) overrides automatic selection.

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Operating and Controlling SWT3-41-H
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Routing IP-Driven Control Signals via Built-in Control Gateway
Remote IP connected clients can send from the LAN, via the SWT3-41-H built-in control
gateway, CEC, RS-232 and I/O commands, and receive responses and notifications, to
control devices connected to SWT3-41-H HDMI-OUT, RS-232 and I/O control ports. The
built-in control gateway sends the control commands (converted from the client received IP
messages) to the connected controlled devices, and distributes the responses received from
the connected controlled devices to all connected clients.
Figure 8 shows the SWT3-41-H built-in control gateway connection. The Kramer Control
controller is connected to the switcher via LAN, sends IP commands to the switcher control
gateway over the LAN connection, to send control messages to, and receive control
responses from:
•The display connected to the HDMI output (CEC) and the RS-232 port.
•The Occupancy Detector & Select In Button connected to the switcher via the I/O ports.
Figure 8: Controlling remotely via Control Gateway
Built-in control gateway activation, activation of the associated control ports and their
attributes (such as the CEC logical address of the control gateway), as well as manual
commands testing operation, is done via SWT3-41-H control gateway webpages (see Setting
Control Gateway Properties on page 28).

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Operating and Controlling SWT3-41-H
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Using Front and Rear Panel Buttons
SWT3-41-H front and rear panel buttons enable the following actions:
•Selecting an INPUT.
•VOL buttons to increase or decrease the buttons.
•MUTE to mute/unmute the audio output.
•Turning the display on or off via the DISPLAY ON or sending on or off commands that
are configured via the UI (see Controlling the Display on page 31).
•Resetting device to its factory settings (for additional instructions on resetting and
resetting device (see Resetting and Restarting Device on page 24).
Operating via Ethernet
You can connect to SWT3-41-H via Ethernet using either of the following methods:
•Directly to the PC using a crossover cable (see Connecting Ethernet Port Directly to a
PC on page 11).
•Via a network switch or router, using a straight-through cable (see Connecting Ethernet
Port via a Network Switch on page 13) .
If you want to connect via a router and your IT system is based on IPv6, speak to your IT
department for specific installation instructions.
Connecting Ethernet Port Directly to a PC
You can connect the Ethernet port of SWT3-41-H directly to the Ethernet port on your PC
using a crossover cable with RJ-45 connectors.
This type of connection is recommended for identifying SWT3-41-H
with the factory configured default IP address.
After connecting SWT3-41-H to the Ethernet port, configure your PC as follows:
1. Click Start > Control Panel > Network and Sharing Center.
2. Click Change Adapter Settings.

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Operating and Controlling SWT3-41-H
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3. Highlight the network adapter you want to use to connect to the device and click Change
settings of this connection.
The Local Area Connection Properties window for the selected network adapter appears
as shown in (Figure 9).
Figure 9: Local Area Connection Properties Window
4. Highlight either Internet Protocol Version 6 (TCP/IPv6) or Internet Protocol Version 4
(TCP/IPv4) depending on the requirements of your IT system.
5. Click Properties.
The Internet Protocol Properties window relevant to your IT system appears as shown in
Error! Reference source not found. or Error! Reference source not found..
Figure 10: Internet Protocol Version 4 Properties Window

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Operating and Controlling SWT3-41-H
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Figure 11: Internet Protocol Version 6 Properties Window
6. Select Use the following IP Address for static IP addressing and fill in the details as
shown in Error! Reference source not found..
For TCP/IPv4 you can use any IP address in the range 192.168.1.1 to 192.168.1.255
(excluding default 192.168.1.39 fallback address) that is provided by your IT department.
Figure 12: Internet Protocol Properties Window
7. Click OK.
8. Click Close.
Connecting Ethernet Port via a Network Switch
You can connect the Ethernet port of SWT3-41-H to the Ethernet port on a network switch or
router using a straight-through cable with RJ-45 connectors.
Configuring Ethernet Port
You can set the Ethernet parameters via the embedded Web pages.

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Operating and Controlling SWT3-41-H
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Discovering and acquiring IP address
SWT3-41-H includes IP address auto-acquiring policy via LAN-connected DHCP server by
default. When no DHCP server is detected, a fallback static IP address of 192.168.1.39, and
255.255.255.0 subnet mask (class C), is assigned until an IP address is acquired via the
DHCP server.
For more information, refer to Product Page Technical Note in
www.kramerav.com/product/SWT3-41-H.

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Using Embedded Web Pages
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Using Embedded Web Pages
SWT3-41-H enables you to configure settings via Ethernet using built-in, user-friendly web
pages. The Web pages are accessed using a Web browser and an Ethernet connection.
You can also configure SWT3-41-H via Protocol 3000 commands (see Protocol 3000
Commands on page 50).
Before attempting to connect:
•Perform the procedure in (see Operating via Ethernet on page 11).
•Ensure that your browser is supported.
The following operating systems and Web browsers are supported:
Operating Systems
Browser
Windows 7
Chrome
Windows 10
Edge
Chrome
Mac
Safari
iOS
Safari
Android
N/A
If a web page does not update correctly, clear your Web browser’s cache.
Check that Security/firewalls are not blocking HTTP traffic between the device and the user
PC.
To access the web pages:
1. Enter the IP address of the device in the address bar of your internet browser (default =
192.168.1.39).
If security is enabled, the Login window appears.
Figure 13: Embedded Web Pages Login Window

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Using Embedded Web Pages
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2. Enter the Username (default = Admin) and Password (default = Admin) and click
Sign in. The default web page appears.
Figure 14: AV Settings Page

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Using Embedded Web Pages
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3. Click the arrow at the top of the navigation list to view the menu items in detail.
Figure 15: Navigation pane in Detail
4. Click the Navigation Pane on the left side of the screen to access the relevant web page.
SWT3-41-H web pages enable performing the following actions:
•Operation on page 17.
•Settings on page 19.
•Setting Device Properties on page 22.
•Setting Control Gateway Properties on page 28.
•Diagnostics on page 39.
•Administration on page 40.
•Viewing the About Page on page 44.
Operation
Routing AV Signals
This section details the following actions:
•Routing an Input to an Output on page 17.
•Setting Analog Audio Output Level on page 18.
Routing an Input to an Output
Route any of the 4 inputs to the output.

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Using Embedded Web Pages
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To route the inputs to the output:
1. Go to the Routing Settings page.
Figure 16: Routing Page
2. Perform the following functions:
▪Click an Input/Output cross-point.
A green light on a button indicates a connected source/acceptor.
To select the button, make sure to click the text within the square.
▪Click to stop/play the video.
An input is routed to the output.
Setting Analog Audio Output Level
To set the audio output level:
1. Go to the Routing Settings page.
2. Under Analog Outputs click .