Extron electronics UCS 303 User manual

User Guide
UCS 303
Three Input, One Output Collaboration Switcher
68‑3538‑01 Rev. A
12 23
DVI/HDMI/USB Switchers

Safety Instructions
Safety Instructions • English
WARNING: This symbol, , when used on the product, is intended to
alert the user of the presence of uninsulated dangerous voltage within
the product’s enclosure that may present a risk of electric shock.
ATTENTION: This symbol, , when used on the product, is intended
to alert the user of important operating and maintenance (servicing)
instructions in the literature provided with the equipment.
For information on safety guidelines, regulatory compliances, EMI/EMF
compatibility, accessibility, and related topics, see the Extron Safety and
Regulatory Compliance Guide, part number 68‑290‑01, on the Extron website,
www.extron.com.
www.extron.com
I
www.extron.com


Copyright
© 2023 Extron. All rights reserved. www.extron.com
Trademarks
All trademarks mentioned in this guide are the properties of their respective owners.
The following registered trademarks (®), registered service marks (SM), and trademarks (TM) are the property of RGBSystems, Inc. or Extron (see the
current list of trademarks on the Terms of Use page at www.extron.com):
Registered Trademarks (®)
Extron, Cable Cubby, ControlScript, CrossPoint, DTP, eBUS, EDID Manager, EDID Minder, eLink, Flat Field, FlexOS, Glitch Free, GlobalConfigurator,
GlobalScripter, GlobalViewer, Hideaway, HyperLane, IPIntercom, IPLink, KeyMinder, LinkLicense, LockIt, MediaLink, MediaPort, NAV,
NetPA, PlenumVault, PoleVault, PowerCage, PURE3, Quantum, ShareLink, Show Me, SoundField, SpeedMount, SpeedSwitch, StudioStation,
SystemINTEGRATOR, TeamWork, TouchLink, V‑Lock, VN‑Matrix, VoiceLift, WallVault, WindoWall, XPA, XTP, XTPSystems, and ZipClip
Registered Service Mark(SM) : S3 Service Support Solutions
Trademarks (™)
AAP, AFL (Accu‑RATEFrameLock), ADSP(Advanced Digital Sync Processing), AVEdge, CableCover, CDRS(ClassD Ripple Suppression),
CodecConnect, DDSP(Digital Display Sync Processing), DMI (DynamicMotionInterpolation), DriverConfigurator, DSPConfigurator, DSVP(Digital
Sync Validation Processing), EQIP, Everlast, FastBite, Flex55, FOX, FOXBOX, IP Intercom HelpDesk, MAAP, MicroDigital, Opti‑Torque,
PendantConnect, ProDSP, QS‑FPC(QuickSwitch Front Panel Controller), RoomAgent, Scope‑Trigger, SIS, SimpleInstructionSet, Skew‑Free,
SpeedNav, Triple‑Action Switching, True4K, True8K, Vector™ 4K, WebShare, XTRA, and ZipCaddy

FCC Class A Notice
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part15 of the FCC rules. The ClassA limits provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is
likely to cause interference. This interference must be corrected at the expense of the user.
NOTES:
• This unit was tested with shielded I/O cables on the peripheral devices. Shielded
cables must be used to ensure compliance with FCC emissions limits.
• For more information on safety guidelines, regulatory compliances, EMI/EMF
compatibility, accessibility, and related topics see the Extron Safety and
Regulatory Compliance Guide on the Extron website.
VCCI-A Notice
この装置は、クラスＡ情報技術装置です。 この装置を家庭環境で使用すると、電波妨害を引き
起こすことがあります。 その場合には使用者が適切な対策を講ずるよう要求されることがあります。
ＶＣＣI－Ａ
Battery Notice
This product contains a battery. Do not open the unit to replace the battery. If the
battery needs replacing, return the entire unit to Extron (for the correct address, see the
Extron Warranty section on the last page of this guide).
CAUTION: Risk of explosion. Do not replace the battery with an incorrect type. Dispose
of used batteries according to the instructions.
ATTENTION : Risque d’explosion. Ne pas remplacer la pile par le mauvais type de
pile. Débarrassez-vous des piles usagées selon le mode d’emploi.

Conventions Used in this Guide
Notifications
The following notifications are used in this guide:
CAUTION: Risk of minor personal injury.
ATTENTION : Risque de blessuremineure.
ATTENTION:
• Risk of property damage.
• Risque de dommages matériels.
NOTE: A note draws attention to important information.
Software Commands
Commands are written in the fonts shown here:
^AR Merge Scene,,0p1 scene 1,1 ^B 51 ^W^C.0
[01] R 0004 00300 00400 00800 00600 [02] 35 [17] [03]
EX! *X1&*X2)*X2#*X2! CE}
NOTE: For commands and examples of computer or device responses used in this
guide, the character “0” is used for the number zero and “O” is the capital letter
“o.”
Computer responses and directory paths that do not have variables are written in the font
shown here:
Reply from 208.132.180.48: bytes=32 times=2ms TTL=32
C:\Program Files\Extron
Variables are written in slanted form as shown here:
ping xxx.xxx.xxx.xxx —t
SOH R Data STX Command ETB ETX
Selectable items, such as menu names, menu options, buttons, tabs, and field names are
written in the font shown here:
From the File menu, select New.
Click the OK button.
Specifications Availability
Product specifications are available on the Extron website, www.extron.com.
Extron Glossary of Terms
A glossary of terms is available at http://www.extron.com/technology/glossary.aspx.

viUCS 303 • Contents
Contents
Introduction ................................................ 1
About this Guide.................................................. 1
About the UCS 303 Switcher............................... 1
Features .............................................................. 2
USB System Architecture .................................... 3
Application Diagrams........................................... 5
Installation.................................................. 7
Installation Overview ............................................ 7
Rear Panel Connections ...................................... 8
Wiring the CONTACT/TALLY Connectors........... 10
Connecting Using an SM Cable..................... 12
LockIt HDMI Cable Lacing Bracket Installation... 13
Wiring the LAN Port........................................... 14
Connecting Multiple UCS 303 Switchers in a
System............................................................. 15
Operation.................................................. 16
Front Panel Features.......................................... 16
Powering on the Switcher.................................. 18
Selecting an Input.............................................. 18
Auto-switching .................................................. 18
Auto-switch Modes ....................................... 19
Auto-switch Type .......................................... 19
Resetting........................................................... 19
Front Panel Lock Mode (Executive Mode).......... 20
EDID Minder...................................................... 20
HDCP................................................................ 21
Inputs ............................................................ 21
Output........................................................... 21
HDCP Authorized Setting .............................. 21
HDCP Encryption .......................................... 22
HDCP Notification.......................................... 22
Color Bit Depth.................................................. 22
USB-C Input...................................................... 22
DisplayPort Alt Mode .................................... 22
USB-C Power Delivery................................... 23
SIS Communication and Control ................ 26
Using Simple Instruction Set (SIS) Commands... 26
Host-to-switcher Communications ................ 26
Switcher-initiated Messages .......................... 26
Error Responses............................................ 27
Enabling and Disabling Telnet ............................ 27
Using the Command and Response Table......... 27
Unsolicited Responses .................................. 28
Symbol Definitions ......................................... 28
Command and Response Table for SIS
Commands ...................................................... 29
Symbol Definitions for CEC Communications
Commands ...................................................... 39
Command and Response Table for CEC
Communications SIS Commands..................... 40
Product Configuration Software................. 42
Downloading PCS from the Website.................. 42
Starting PCS ..................................................... 44
Connecting Using the TCP/IP Panel............... 46
Updating Firmware ............................................ 47
Firmware Loader ............................................... 47
Downloading Firmware Loader ...................... 47
Updating Firmware Using Firmware Loader ... 50
Internal Web Page..................................... 53
Accessing the Web Page................................... 53
Web Page Components .................................... 54
Details Panel ................................................ 54
Status Panel ................................................. 55
Date and Time Panel ..................................... 55
Network Panel............................................... 58
Passwords Panel........................................... 59
Firmware Panel.............................................. 60

viiUCS 303 • Contents
Mounting .................................................. 63
Tabletop Use ................................................. 63
Rack Mounting .............................................. 63
Extron Warranty ........................................ 65

UCS 303 • Introduction 1
Introduction
This section gives an overview of the Extron UCS 303 Collaboration switchers. Topics
include:
• About this Guide
• About the UCS 303 Switcher
• Features
• USB System Architecture
• Application Diagrams
About this Guide
This guide describes the UCS 303 Collaboration switcher and provides instructions for an
experienced installer to set up and operate it.
ATTENTION:
• Installation and service must be performed by authorized personnel only.
• L’installation et l’entretien doivent être effectués uniquement par un électricien
qualifié.
In this guide, the terms “UCS,” “UCS 303,” and “switcher” are used interchangeably to refer
to the UCS 303.
About the UCS 303 Switcher
The Unified Communication System (UCS) 303 is a three input, one output multi-format
video and USB collaboration switcher with built-in display control that supports HDMI 2.0b,
DisplayPort 1.2, USB 3.2 (SuperSpeed 10 Gbps) and HDCP 2.3 specifications. It integrates
AV, USB switching and display control in environments such as conference rooms, huddle
rooms, and classrooms.
The switcher features one HDMI input, one DisplayPort input, one USB-C input, and one
HDMI output with CEC. It also has three USB switched Host inputs and a built-in USB hub
to switch and share USB peripherals such as USB web cams, touch displays, and USB
microphones. Audio can be extracted from any video input.
Resolutions up to 4K @ 60 Hz are supported, along with EDID Minder, HDCP 2.3, and
configuration via Product Configuration Software (PCS). All models extend signals up to
330 feet (100 meters). The UCS 303 is housed in a 1U high, half rack width, 8.5 inches
deep enclosure.

UCS 303 • Introduction 2
Features
• Integrates DisplayPort, HDMI, and audio sources into collaboration systems —
The UCS 303 provides centralized switching for a wide range of AV sources.
• Switches HDMI video and embedded multi‑channel digital audio.
• HDMI, DisplayPort, and USB inputs — Provides one female DisplayPort, one female
HDMI type A, one USB-C, and two USB 3.2 B host input connectors.
• HDMI output — Features one female HDMI type A output.
• Supports resolutions up to 4K @ 60 Hz with 4:4:4 chroma sampling.
• Auto‑switching between inputs — Auto-switching allows for intuitive operation in
collaboration spaces. Multiple switching priority modes are available, including last-
connected input and user-selectable priority.
• HDCP 2.3 compliant — Ensures display of content-protected 4K video media and
maintains interoperability with earlier versions of HDCP.
• Supports DisplayPort Single Stream Transport (SST) data rates up to 21.6 Gbps
• Supported HDMI 2.0b specification features include data rates up to 18 Gbps,
HDR, Deep Color, and HD lossless audio formats
• Stereo audio embedding — Digital audio signals can be embedded onto the HDMI
output.
• Stereo audio de‑embedding — Embedded HDMI two-channel PCM audio can be
extracted to the digital output, or multi-channel bitstream formats can be passed to the
output.
• Ethernet monitoring and control — Enables control and proactive monitoring over a
network.
• Support for High Dynamic Range (HDR) video — Enables greater contrast range
and wider color gamut by providing the necessary video bandwidth, color depth, and
metadata interchange capability for HDR video.
• CEC insertion — A control processor can insert CEC commands via SIS to control
devices connected at the HDMI output.
• User‑selectable HDCP authorization — Allows individual inputs to appear HDCP
compliant or non-HDCP compliant to the connected source, which is beneficial if the
source automatically encrypts all content when connected to an HDCP-compliant
device. Protected material is not passed in non-HDCP mode.
• EDID Minder — EDID Minder automatically manages EDID communication between
connected devices, ensuring that the source powers up properly and reliably outputs
content for display.
• HDCP authentication and signal presence confirmation — Provides real-time
verification of HDCP status for each digital video input and output. This allows for
simple, quick, and easy signal and HDCP verification through USB or Ethernet,
providing valuable feedback to a system operator or helpdesk support staff.
• HDCP Visual Confirmation notifies when encrypted content is sent to a
non‑compliant display — A full-screen green signal is sent when HDCP-encrypted
content is transmitted to a non-HDCP compliant display, providing immediate visual
confirmation that protected content cannot be viewed on the display.
• HDMI to DVI Interface Format Correction — Automatically enables or disables
embedded audio and InfoFrames, and sets the correct color space for proper
connection to HDMI and DVI displays.

UCS 303 • Introduction 3
• Automatic color bit depth management — Automatically adjusts color bit depth
based on the display EDID, preventing color compatibility conflicts between source and
display.
• Supports multiple embedded audio formats — The UCS 303 is compatible with
a broad range of multi-channel audio signals, providing reliable operation with HDMI
sources.
• Power Save Mode — Can be placed in a low power standby state to conserve energy
when not in use.
• Front panel security lockout — This feature locks out all front panel functions; all
functions however, are available through Ethernet or USB control.
• Built‑in web pages — Enable the use of a standard browser for device monitoring and
troubleshooting over an intuitive Web interface.
• RS‑232 display control port — Enables the use of serial commands to control an
attached display.
• Front panel USB‑C configuration port — Enables easy system configuration without
having to access the rear panel.
• Front panel LED indicators for signal presence, HDCP status, and power —
Provides visual indication of system status for real-time feedback and monitoring of key
performance parameters.
• Easy setup and commissioning with the Extron PCS program — Conveniently
configure multiple products using a single software application.
• Rack‑mountable metal enclosure — The UCS 303 features a 1U, half rack wide
metal enclosure with integrated rack mounts.
• Includes LockIt HDMI cable lacing brackets to secure HDMI connectors in
place
• Internal Extron Everlast power supply — Provides worldwide power compatibility,
with high-demonstrated reliability and low power consumption for reduced operating
cost. The Everlast Power Supply is covered by a 7-year parts and labor warranty.
USB System Architecture
A USB system architecture refers to the physical bus topology of USB devices connected
to a host device. USB devices include USB hubs, USB peripheral devices, or compound
devices (devices with a combination of USB hubs and USB peripheral devices built into it).
The system is organized in a tiered star topology to prevent multiple or circular attachments
to the bus (see figure1 on the next page) Each tier represents a degree of separation from
the host device. Per USB specifications, there are seven supported tiers, starting with the
host device (or root hub) occupying the first tier.
NOTE: Do not connect more than five daisy-chained hubs to the root hub. The
architecture does not support peripheral devices connected to USB hubs occupying
the seventh tier.

UCS 303 • Introduction 4
Tier 1
Tier 2
Tier 3
Tier 4
Tier 5
Tier 6
Tier 7
PC
Compound Device
Camera
Speaker
Hub
Root Hub
Built-in Hub
Monitor
Monitor
Monitor
Monitor
Keyboard Mouse = USB hub
= USB peripheral device
Figure 1. Tiered Star Topology Example for a Computer with Four Monitors
NOTE: Some computers include multiple hubs already connected to each other,
occupying multiple tiers in the topology. For example, many computers with USB
ports on the front and rear panels or computers with a built-in USB hub and a
compound USB peripheral device (such as a touch display) occupy two tiers. For
information about USB hubs used in Extron products, see the USB Hub Usage Chart
at www.extron.com.
To review the USB system architecture, count all the cascading hubs (including USB hubs
enclosed in computers and compound devices) between the host device and the last USB
peripheral device.
NOTE: If the host device runs Windows®or macOS™ operating systems, use the
following programs to view the hierarchical relationships between USB devices:
• Windows: Device Manager
• macOS: System Profiler or System Information
1

UCS 303 • Introduction 5
Application Diagrams
UCS 303
1
HDMIHDMI/CEC
3
60W
USB-C
OUTPUT
RS-232
Tx Rx G
LAN
100-240V
~
1.2A MAX
50-60Hz
INPUTS
2
DP
DEVICES
CONTACT/TALLY
DISPLAY
34
USB 2.0SS 10G
51 2
CT CT CT CT CT+V G
HOST HOST
12 345
USBCHARGER
USB Camera
with Mic
PC
HDMI
Ethernet
USBDP
HDMI
USBUSB
USB-C
(Data/Power/Video)
(Data/Power/Video)
RS-232
Extron
Cable Cubby 100
Cable Access
Enclosure
Extron
UCS 303
Collaboration
Switcher
Displa
y
USB-C
Laptop
La
ptop
USB
HDMI
Figure 2. Sample Application for UCS 303
POWER
12V
1A MAX
G
Tx Rx RTSCTS
COM 1
G
Tx Rx
COM 2
VCG
VOL RELAYS
1 2C
1 234 G
DIGITAL I/O
PWROUT =6W
eBUS
+V +S -S G
LAN
IPCP PRO 250 xi
IR/S
GS
UCS 303
1
HDMIHDMI/CEC
3
60W
USB-C
OUTPUT
RS-232
Tx Rx G
LAN
100-240V
~
1.2A MAX
50-60Hz
INPUTS
2
DP
DEVICES
CONTACT/TALLY
DISPLAY
3 4
USB 2.0SS 10G
51 2
CT CT CT CT CT+V G
HOST HOST
12 345
F
2
.
8
A
S
P
H
1
2
0
F
O
V
USBCHARGER
Reset
USB-C
USB-C
La
ptop
La
ptop
Ethernet
USB
USB
Extron
UCS 303
Collaboration
Switcher
Collaboration Bar
Collaboration
Control Panel
HDMI
Ethernet
Ethernet
Extron
IPCP Pro 250 xi
IPCP Pro xi Control Processor
Display
HDMI
USBUSB
(Data/Power/Video)
(Data/Power/Video)
USB
HDMI
HDMI
Extron
Cable Cubby 100
Cable Access
Enclosure
Collaboration PC
Figure 3. Sample Application for UCS 303 — Teams Room with Collaboration PC
and Control Panel
2
3

UCS 303 • Introduction 6
C AT
POWER
2.0A MAX
12V
INPUTS
DMP EXP
AT
ACP
REMOTE
USB AUD
I/O
OUTS
1
+V +S -S G
IN GOIN GO IN GOIN GOIN GOIN GO
212 34 56 34 56 12 34
1 (PRI) PoE+2 (SEC)
RS-232
Tx Rx GLAN
R
UCS 303
1
HDMI HDMI/CEC
3
OUTPUT
RS-232
Tx Rx G
LAN
100-240V
~
1.2A MAX
50-60Hz
INPUTS
2
60W
USB-CDP
DEVICES
CONTACT/TALLY
DISPLAY
3 4
USB 2.0SS 10G
51 2
CT CT CT CT CT+V G
HOST HOST
12 345
POWER
1.3A MAX
12V
MPA601-70V
R
L
(SUMMED)
VCG
TIMER OFFG
STANDBY
10V50mA
L
(SUMMONED)
R
R
INPUTS
70V OUTPUT
REMOTE
CLASS 2 WIRING
USB-C
PTZ
Camera
PC
Extron
PROGRAMMIC
VOLUME
MUTE
SOURCE
3
SOURCE
1
SOURCE
2
PCSHARELINKON/OFF
PRESS PRESS
USBCHARGER
125VAC. 50-60 Hz 12A MAX
PRESS
USB-C
La
ptop
La
ptop
POWERSTANDBY
Ethernet
ACP
USB
USB
Ethernet
Extron
UCS 303
Collaboration
Switcher
Display
HDMI
HDMI
USB
AudioAudio Audio
USBDP
(Data/Power/Video)
Extron
Cable Cubby 500 CCB
Cable Access
Enclosure
Extron
DMP 64 Plus C AT
Digital Matrix Processor
Extron
MPA 601 70V
Amplier
Extron
FF 220T
Flat Field Speaker
Extron
ACP 100
Audio Control
Panel
(Data/Power/Video)
USB
HDMI
Ceiling Mic
Figure 4. Sample Application for UCS 303 with Audio Amplifier and Processor
4

UCS 303 • Installation 77
Installation
This section describes the installation and setup of the UCS 303 switcher. Topics include:
• Installation Overview
• Rear Panel Connections
• Wiring the CONTACT/TALLY Connectors
• LockIt HDMI Cable Lacing Bracket Installation
• Wiring the LAN Port
• Connecting Multiple UCS 303 Switchers in a System
Installation Overview
CAUTION: Remove power from the system before wiring.
ATTENTION : Coupez l’alimentation avant de faire l’installation électrique.
ATTENTION:
• Use electrostatic discharge precautions (be electrically grounded) when making
connections. Electrostatic discharge (ESD) can damage equipment, although
you may not feel, see, or hear it.
• Prenez des précautions contre les décharges électrostatiques (soyez
électriquement relié à la terre) lorsque vous effectuez des connexions. Les
décharges électrostatiques (ESD) peuvent endommager l’équipement, même si
vous ne pouvez pas le sentir, le voir ou l’entendre.
To install and set up a UCS 303 switcher:
1. Turn off all equipment and disconnect the unit from the power source.
2. Mount the switcher (optional) on a rack shelf or furniture (see Mounting starting on
page63).
3. Connect video sources and supporting host devices:
• Input 1 — Connect an HDMI source and a supporting host device such as a PC or
a Next Unit of Computing (NUC) to the HDMI and associated host input connector
(see figure5, Kand Bon the next page).
• Input 2 — Connect a DisplayPort source and a supporting host device such as a
PC or an NUC to the DisplayPort input and associated host connectors (Jand
B).
NOTE: LockIt cable lacing brackets are provided to secure the HDMI cables to the
ports to reduce stress on the HDMI connectors and prevent signal loss due to
loose cable connections (see LockIt HDMI Cable Lacing Bracket Installation
on page13).
4. Connect a USB‑C source to the rear panel USB-C connector (I).
5. Connect a video output — Connect an HDMI display to the HDMI output (C) to
display the transmitted digital image.

UCS 303 • Installation 8
6. Connect peripheral devices — Connect one or more peripheral USB devices (for
example, keyboards or mice) to the USB 3.2 and 2.0 output device ports (see figure5,
Dand E) as desired.
7. (Optional) For RS-232 control of a display, connect the RS-232 port of the display to the
Display port (F).
8. Connect a computer to one of the following UCS ports to configure and control the
switcher via SIS commands or PCS:
• USB‑C CONFIG port — Front panel USB-C connector (see figure12, D on
page17).
• LAN port — Connect an Ethernet cable between the computer and the LAN port
to control and configure the UCS 303 via Ethernet (see figure5, G).
9. Enable auto‑input switching. Use SIS commands to configure auto-input switching
(see the Auto‑switch mode commands on page29) (optional).
10. Power on the connected devices.
11. Connect power (A) to the switcher.
ATTENTION:
• Do not connect power to the UCS 303 until you have read the ATTENTION
notices on page11.
• Ne branchez pas l’alimentation au UCS 303 avant d’avoir lu les mises en
garde « ATTENTION » aux page14.
12. Power on the source devices.
Rear Panel Connections
Figure 5 shows the rear panel of the UCS 303.
UCS 303
1
HDMI HDMI/CEC
3
60W
USB-C
OUTPUT
RS-232
Tx Rx G
LAN
100-240V
~
1.2A MAX
50-60Hz
INPUTS
2
DP
DEVICES
CONTACT/TALLY
DISPLAY
34
USB 2.0SS 10G
51 2
CT CT CT CT CT+V G
HOST HOST
12 345
C
C
C
A
A
A
K
K
K
B
B
BD
D
DE
E
EF
F
F
J
J
JI
I
IG
G
G
H
H
H
A IEC power connector
B USB host ports
C HDMI/CEC output
D USB SS 10G device ports
E USB 2.0 device ports
F RS‑232 display control port
G LAN port
H Contact/Tally ports
I USB‑C input
J DisplayPort input
K HDMI input
Figure 5. UCS 303 Rear Panel
AIEC power connector — Connect a 100-240 VAC IEC power cable to this connector
to provide AC power to the switcher.
5

UCS 303 • Installation 9
BUSB host ports — Connect PCs or other USB host devices to one or both of
these female USB type B connectors for USB 3.2 input to support HDMI (input 1) or
DisplayPort (input 2).
CHDMI/CEC output — Connect an HDMI (or DVI with an appropriate adapter) output
device to this connector for HDMI video with CEC and embedded audio. The output
supports resolutions up to 4096 x 2160 @ 60 Hz, 8-bit, with 4:4:4 chroma sampling.
NOTE: See the LockIt HDMI Cable Lacing Bracket Installation on page13
to secure the HDMI connector.
DUSB SS 10G device ports — Connect USB 3.2, 2.0, or 1.xdevices and HIDs
(peripherals such as keyboards, mice, or storage drives) to these blue USB ports.
USB 3.2 signals from the inputs are routed to these ports. Each port provides up to 5 V,
900 mA of power to the connected devices.
NOTE: These ports do not provide power if the connected device is receiving
power from a separate power supply.
EUSB 2.0 device ports — Connect USB 2.0 or 1.xdevices to these black USB Type
A ports. USB 2.0 and 1.xsignals from the inputs are routed to these ports. Each port
provides up to 5 V, 500 mA of power.
NOTE: These ports do not provide power to the connected device if it is receiving
power from a separate power supply.
F RS‑232 display control port —
Connect this port to the RS-232 connector of a display to control the display. The port
can be configured using PCS (see the UCS 303 Help File) to control the display in the
following modes:
Mode Function
0 Disabled
1 Built-in internal control of RS-232 capable endpoints such as displays
without the need of an external control processor.
Custom RS-232 commands can be sent via PCS out of this port based
on events or triggers (such as contact closure or HDMI video input signal
presence).
2 External control of RS-232 capable endpoints such as a display using
Ethernet to RS-232 insertion.
This mode enables serial commands to be passed from the Ethernet port to
this RS-232 port. It enables control of endpoints such as the display without
needing to run additional cabling from the control processor to the endpoint.
Display
Ground (G)
Receive (Rx)
Transmit (Tx)
Ground (G)
Receive (Rx)
Transmit (Tx)
Bidirectional
Do not tin the wires!
Tx Rx G
RS‑232
UCS 303
RS-232 Port
Figure 6. Wiring for RS‑232 Display Control
6

UCS 303 • Installation 10
GLAN port — Connect the switcher to an active network using an Ethernet cable,
terminated with an RJ-45 connector. To wire this port, see Wiring the LAN Port on
page14).
NOTES:
• If the UCS is set as a DHCP client and cannot locate a DHCP server, the port is
set to a local address link.
• All Ethernet interfaces on the UCS 303 support up to 10/100/1000 Mbps
(Gigabit Ethernet).
HContact/Tally ports — (Optional) Wire a push-button switch or other contact closure
device to pin C(contact) and to the shared pin G(ground) of any of these 2-pole
connectors (see Wiring the CONTACT/TALLY Connectors on page10 for more
information). These ports are configured via PCS or SIS commands.
12345
CT CT CT CT CT +V G
CONTACT/TALLY
Figure 7. CONTACT/TALLY Ports
Alternatively, wire a Show Me (SM) cable to the Cand Tpins (see Connecting Using
an SM Cable on page11 for connection instructions).
IUSB‑C input — Connect a USB-C source device, such as a laptop or PC, to this
USB-C connector.
This port can be configured in DP Alt Mode via SIS commands to convert USB-C
signals from the connected PC to DisplayPort. Once USB-C has been converted to DP,
four DisplayPort lanes are available. The DisplayPort signal is then converted to TMDS,
to be output on the HDMI output port.
This port provides up to 60 watts of power to the connected source. If the source
requires more than 60 watts, this port keeps the device functioning but does not charge
it. If the source is connected to an external power supply, the UCS 303 does not send
power to it.
JDisplayPort input — Connect a DisplayPort source device to this DP connector. This
port supports up to 4k @ 60 Hz, 8-bit color with 4:4:4 chroma sampling.
KHDMI input — Connect an HDMI (or DVI with appropriate adapters) video input source
to this female HDMI port for HDMI video with embedded audio.
NOTE: LockIt cable lacing brackets are provided to secure the HDMI cables to
the ports to reduce stress on the HDMI connectors and prevent signal loss
due to loose cable connections (see LockIt HDMI Cable Lacing Bracket
Installation on page13).
Wiring the CONTACT/TALLY Connectors
To make input selections via contact closure, short the Cpin of each port momentarily to the
ground pin G. Input switching occurs immediately on contact, and not on the release.
To enable input switching via contact closure, connect a push-button contact closure device
to a CONTACT/TALLY connector (see figure5, H, on page 9).
To identify the currently selected input when the front panel buttons are not visible, connect
a device such as an LED to the CONTACT/TALLY connector and to the +V connector (see
figure8, 3on the next page). When the input being used is selected, the corresponding
Tally Out pin shorts to ground, activating the connected indicator.
7

UCS 303 • Installation 11
ATTENTION:
• The length of the exposed wires in the stripping process is critical. The ideal
length is 3/16 inch (5 mm). If the exposed portion is longer, the wires may touch,
causing a short circuit between them. If the exposed wires are shorter, they can
be easily pulled out, even if tightly fastened by the captive screws.
• La longueur des câbles exposés est primordiale lorsque l’on entreprend de les
dénuder. La longueur idéale est de 5mm (3/16inches). S’ils sont un peu plus
longs, les câbles exposés pourraient se toucher et provoquer un court circuit.
S’ils sont un peu plus courts, ils pourraient sortir, même s’ils sont attachés par
les vis captives.
• Do not tin the wires. Tinned wires are not as secure in the captive screw
terminals <connector> and could pull out.
• Ne pas étamer les câbles. Les câbles étamés ne sont pas aussi bien fixés dans
les terminaisons des <connecteurs> à vis captives et pourraient sortir.
• The installation must always be in accordance with the applicable provisions of
National Electrical Code ANSI/NFPA 70, article 725 and the Canadian Electrical
Code part 1, section 16.
• Cette installation doit toujours être conforme aux dispositions applicables du
Code américain de l’électricité (National Electrical Code) ANSI/NFPA 70, article
725, et du Code canadien de l’électricité, partie 1, section 16.
4
4
4
12345
CT CT CT CT CT +V G
CONTACT/TALLY
1
1
13
3
3
2
2
2
Figure 8. CONTACT/TALLY Ports
The contact closure ports have the following functions:
Contact Closure
Pin Number
Function
1Input 1
2Input 2
3Input 3
4AUX
5AUX
GGround
• Ports 1-3 (see figure8, 1) — These can be configured as a mutually exclusive input
group to allow for input switching via Show Me (SM) cables. The selected input tally
illuminates steadily when displayed, or blinks when muted.
Optionally, successive contact closures of the current input can be configured to toggle
A/V mute or output sync mute.
If None is selected, contact events broadcast unsolicited SIS responses for action via
external control system. Tally ports are configured via an external control system.
8

UCS 303 • Installation 12
• Ports 4 and 5 (see figure8, 2on the previous page) — These contact ports can be
configured as follows via PCS:
• None — contact events broadcast unsolicited SIS responses for action via an
external control system. Tally ports are configured via external control system.
• Single switch — Individual contact input triggers user-defined events (such as
Volume Up), along with an optional repeat rate for press and hold actions (such as
ramping volume up several steps). The Tally illuminates when the contact port is
closed.
• Toggle switch — Individual contact input toggles between two sets of
user-defined events (such as mute and unmute). The Tally illuminates when the
contact port is closed.
• Group switch — pairs two contact inputs to act as a mutually exclusive pair, which
trigger events such as system on vs. system off. Tally on the last activated contact
remains illuminated.
• +V connector — The +V pin constantly outputs +5 VDC power with 200 mA total
(shared between pins). Use this pin when power is needed for external Tally LEDs, such
as those on the Extron CCB 30 contact closure remote.
1. Wire and connect provided 2-pole plugs to the CONTACT/TALLY connectors 1 through
5 as desired (see figure8, 1and 2).
2. Connect contact input and tally output devices to the pin pair for each input:
• To enable input switching via contact closure, connect a push-button contact
closure input device to pin Cof the desired contact port, and to the G(ground) pin
(4).
• To identify the currently selected input when the front panel buttons are not visible,
connect an indicator device, such as an LED, to tally output pin Tof the same pair
of pins.
When the input being used is selected, the corresponding Tally pin shorts to
ground, which activates the connected indicator.
3. Insert the power wires for the contact indicator devices into the +V connector (3).
4. Press the button on the contact closure device to switch the connected input to the
output.
Connecting Using an SM Cable
The CONTACT/TALLY connectors can also be used with Extron SM cables. Figure 9 shows
how to wire an SM cable to a contact/tally input.
Black
Red
SM
Cable
CT
1
Figure 9. SM Cable Connecting Contact and Tally Ports
9

UCS 303 • Installation 13
For each SM cable:
• Connect the red (contact) pigtail to the Cpin corresponding to the input being used.
• Connect the black (tally out) pigtail to the Tpin.
NOTE: In an SM cable, the ground source needed to trigger the contact and the
voltage to drive the tally indicator are supplied by HDMI source device. Therefore, it is
not necessary to connect the cable to a G (ground) pin.
LockIt HDMI Cable Lacing Bracket Installation
The Extron LockIt lacing bracket secures a standard HDMI cable to most HDMI devices.
Follow these instructions to secure the HDMI connectors to the switcher with the provided LockIt
HDMI lacing bracket.
NOTE: The Extron HDMI device must have an
HDMI connection mounting screw for this
bracket to be used.
To securely fasten an HDMI cable to a device:
1. Plug the HDMI cable into the panel connection (see
1in the image at right).
2. Loosen the HDMI connection mounting screw from
the panel enough to allow the LockIt bracket to be
placed over it (2). The screw does not have to be
removed.
3. Place the LockIt lacing bracket on the screw and
against the HDMI connector (3), then tighten the
screw to secure the bracket.
4. Loosely place the included tie wrap around the
HDMI connector and the LockIt lacing bracket as
shown at right (4).
While holding the connector securely against the lacing bracket, tighten the tie wrap, then
remove any excess length.
ATTENTION:
• Do not overtighten the HDMI connection mounting screw. The shield to which it
is fastened is very thin and can easily be stripped.
• Ne serrez pas trop la vis de montage du connecteur HDMI. Le blindage auquel
elle est attachée est très fin et peut facilement être dénudé.
3
3
4
1
2