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Kramer EXT3-21-XR-TR HDBaseT 4K60 4:4:4 HDMI / USB / Ethernet / RS232 / IR Extender 100m 2-way PoE

SKU: EXT3-21-XR-TR
Brand: Kramer
$956.00
Brand Kramer
SKU EXT3-21-XR-TR
Weight 3.00 lbs
Warranty 3 Years
Condition New
Status Available
Expert

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Description

The EXT3-21-XR-TR is an HDBaseT 3.0 extender that converts and transmits HDMI, USB, Ethernet, RS-232 and IR signals over twisted-pair copper cabling. It operates as either a transmitter-side converter or a receiver-side auto-switcher to suit flexible deployment. The unit supports uncompressed 4K@60Hz 4:4:4 video and extends signals up to 100m over CAT cables.

Key capabilities include HDMI mirroring to a loop output, auto input switching based on user preferences, and switchable USB 3.2 host selection to connect room cameras and peripherals. The extender passes HDCP 2.3, EDID and CEC and supports HDR10, deep color and multi-channel uncompressed audio. Bidirectional PoE powering over the HDBaseT line and LAN PoE support simplify power and cabling in the field.

Performance specifications deliver up to 18 Gbps total bandwidth (6 Gbps per graphic channel) and 4K@60Hz 4:4:4 24bpp resolution compliance with HDMI 2.0b signaling. The USB subsystem supports USB 3.2 Gen 2 at up to 10 Gbps and extends USB 2.0 traffic up to 480 Mbps with a transmitted data bandwidth allowance of up to 300 Mbps. Ethernet is extended at 1 Gbps and serial RS-232 is supported at baud rates from 300 to 115200.

Connectivity is comprehensive with HDBT RJ-45, HDMI IN/OUT, HDMI loop, USB-B host, three USB-A device ports, balanced stereo analog audio on a 5-pin terminal block, LAN 1000BaseT RJ-45, RS-232 terminal block, 3.5 mm IR, GPIO and relay terminals. The built-in intelligent control gateway supports IP-driven control, CEC, RS-232, IR, I/O and relay control methods. I-EDIDPro EDID management and remote firmware upgrade ensure compatibility and ongoing maintenance.

This extender is suited to conference rooms, lecture halls and shared spaces that require integrated AV and USB device sharing between local and remote participants. It enables hybrid meeting workflows by switching AV and USB hosts to route content to both in-room displays and online participants. The device also supports digital signage and AV distribution scenarios that require long-reach HDMI and control extension.

Installation and maintenance are simplified by PoE powering options, a fanless MegaTOOLS aluminum enclosure, and rack/ceiling/table mounting options. Status LEDs for HDMI, Loop, HDBT and USB host facilitate local troubleshooting while embedded web pages and API control support remote management. Overall construction and control features make the unit practical to deploy and maintain in professional AV environments.

Product Diagrams

View Diagrams

Specifications

Inputs
Receiver Side
1 HDBTRJ-45 connector
1 HDMIHDMI connector
Outputs
Transmitter Side
1 HDBTRJ-45 connector
Transmitter Side
1 HDMI LoopHDMI connector
Receiver Side
1 HDMIHDMI connector
Transmitter or Receiver Side
1 Balanced Stereo Audio Line5-pin terminal block connector
Ports
1 USB 3.2 (Host)USB-B female connector
3 USB 3.2 (Device)USB-A female connectors
1 LAN PoE 1000BaseT EthernetRJ-45 female connector
1 RS-2323-pin terminal block connector
1 IR3.5mm mini jack
2 GPIO2-pin terminal block connector
2 Relay4-pin terminal block connector
Extension Line
ReachUp to 100m (330ft) using Kramer HDBaseT cables
ReachUp to 100m (330ft) for 1080p@60hz using Kramer HDBaseT cables
Standards ComplianceHDBaseT 3.0
Video
Max Data Rate18Gbps bandwidth (6Gbps per graphic channel)
Max Resolution4K@60Hz (4:4:4) 24bpp
Content ProtectionHDCP 2.3
HDMI SupportHDMI 2.0b 4K HDR10 deep color 3D
Receiver-side Max Inputs Switching TimeHDMI to HDBT 5sec, HDBT to HDMI 8sec
USB Features
USB 3.2 Data RateUp to 10Gbps
Integrated USB Hubs1
Standards ComplianceUSB 3.2 GEN 2, 2.0, 1.1
Extended USB
USB 2.0 Data RateUp to 480Mbps
Transmitted Data BandwidthUp to 300Mbps
Standards ComplianceUSB 2.0, 1.1
Extended Ethernet
Max Data Rate1 Gbps
Extended RS-232
Baud Rate300 to 115200
Analog Audio
Max Level15dBu
Impedance500 Ohm
Bandwidth20Hz - 20kHz
THD + N0.002% @1kHz
S/N Ratio-93dB 20Hz - 20kHz
CouplingDC
Power
Power Adapter
Source48V 1.36A
Consumption48V 0.73A
Max. Power35W
PoE
Consumption200mA
Max. Power9.6W
USB Device Charging
Max. Total Current2A
Enclosure
SizeMega Tools
MaterialAluminum
CoolingConvection ventilation
Environmental Conditions
Operating Temperature0° to +40°C (32° to 104°F)
Storage Temperature-40° to +70°C (-40° to 158°F)
Humidity10% to 90% RHL non-condensing
General
Net Dimensions (W, D, H)19 cm x 11.6 cm x 2.7 cm (7.48" x 4.56" x 1.06")
Shipping Dimensions (W, D, H)34.5 cm x 16.5 cm x 5.2 cm (13.58" x 6.5" x 0.41")
Net Weight0.60 kg (1.32 lbs)
Shipping Weight1.11 kg (2.44 lbs)
Accessories
IncludedPower Adapter, cord, Bracket set, QS
Product Dimensions19.00cm x 11.60cm x 2.70cm (7.48" x 4.57" x 1.06")
Product Weight0.6kg (1.3lbs) approx.
Shipping Dimensions34.50cm x 16.50cm x 5.20cm (13.58" x 6.50" x 2.05")
Shipping Weight1.1kg (2.4lbs) approx.
Spec sheet

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