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Crestron DM-EXT-1021-1G 4K 2x1 Auto-Switcher and Wall Plate Extender

Crestron part number DM-EXT-1021-1G-B KIT

The Crestron DM-EXT-1021-1G KIT pairs a 1-gang wall plate HDMI transmitter with a surface-mountable receiver that switches, scales and extends video over a single CATx cable. It is designed for classrooms and meeting spaces, and the wall plate comes in black or white.

Price on request

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Installation and programming

Need it installed? Our Crestron certified engineers install, set up and programme everything we supply. A 4 hour visit is €440 and a full day €880, plus VAT.

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Crestron DM-EXT-1021-1G 4K 2x1 DM Essentials Scaling Auto-Switcher and Wall Plate Extender over CATx Cable

About the Crestron DM-EXT-1021-1G

The kit contains the HD-TXC-4KZ-101-1G wall plate transmitter and the HD-RX-4K-210-C-E receiver. One HDMI source connects at the wall plate and a second at the receiver, which switches between them automatically or manually, with audio following video. The receiver's 4K scaler feeds the display through its HDMI output, and video, audio and power all run over one CAT5e or higher cable.

Cable runs can reach 70 m (230 ft) for resolutions up to 2K, or 40 m (130 ft) for higher resolutions up to 4K. The system supports 4K60 with 4:2:0 colour sampling and 1080p60 at 4:4:4, manages EDID and HDCP 2.2, and supports CEC. Stereo audio can be de-embedded to an analogue output, and there are IR, RS-232, relay and I/O ports plus 100/1000 Ethernet with web browser setup.

The PW-2412WU power pack comes with the receiver and powers both units, so no separate power pack is supplied for the wall plate. Typical consumption is 14.8 W. The transmitter has a metal housing and bracket with a black or white polycarbonate front overlay, and fits a 1-gang or larger electrical box or plaster ring 57 mm (2.25 in) deep, which is not included. The receiver is surface or rack rail mounted.

Key features

  • 1-gang wall plate transmitter in black or white
  • 2x1 switching: one HDMI input at the wall plate, one at the receiver
  • Automatic or manual input switching, audio follows video
  • 4K scaling HDMI output
  • Video, audio and power over one CATx cable
  • Up to 70 m at up to 2K, or 40 m at up to 4K
  • EDID and HDCP 2.2 management, plus CEC
  • IR, RS-232, relay and I/O control ports

DM-EXT-1021-1G specifications

Kit contentsHD-TXC-4KZ-101-1G wall plate transmitter, HD-RX-4K-210-C-E receiver, PW-2412WU power pack
Switching2x1 (1 input at transmitter, 1 at receiver, 1 output at receiver); auto or manual; audio follows video
VideoHDMI with Deep Color and 4K; up to 4096x2160 or 3840x2160 at 60 Hz 4:2:0, or 1920x1080 at 60 Hz 4:4:4
Extension distanceCAT5e or higher: up to 70 m (230 ft) up to 2K; up to 40 m (130 ft) up to 4K
Copy protectionHDCP 2.2; EDID management; CEC
AudioHDMI and analogue stereo line-level output; 2-channel LPCM; 24-bit, 48 kHz DAC
ControlRS-232 2-way up to 115.2k baud; IR 1-way up to 60 kHz; relay and I/O ports; 100/1000 Ethernet
PowerPW-2412WU power pack with the receiver (100-240 VAC in, 24 VDC out) powers both units; 14.8 W typical
Transmitter mounting1-gang (or larger) electrical box or plaster ring 57 mm (2.25 in) deep, not included; metal housing with black or white polycarbonate overlay
Receiver mountingSurface or rack rail mount; metal chassis, black finish, 2 mounting flanges

Part numbers on this page

Part numberVersionPriceAdd
DM-EXT-1021-1G-B KIT Black On request
DM-EXT-1021-1G-W KIT White On request

Where the DM-EXT-1021-1G is used

  • Classrooms and meeting spaces with a wall plate HDMI input
  • Rooms needing two HDMI sources on one display
  • Replacing a black or white wall plate transmitter
  • Displays controlled over RS-232 or IR

Works with the DM-EXT-1021-1G

Crestron installed by 1Install

We supply, install and programme Crestron in homes and businesses across Ireland. These photos are from our own installations. See more in our projects, or budget a whole system with our Quote Builders for homes and meeting rooms.

Large format display in an open plan office in Dublin
Large format display in an open plan office in Dublin
Neatly dressed structured cabling for a Cork office
Neatly dressed structured cabling for a Cork office
Meeting room with dual displays and a Teams Rooms camera in Dublin
Meeting room with dual displays and a Teams Rooms camera in Dublin

Questions about the Crestron DM-EXT-1021-1G

What is in the DM-EXT-1021-1G KIT?

The kit contains an HD-TXC-4KZ-101-1G 1-gang wall plate transmitter, an HD-RX-4K-210-C-E surface-mountable receiver and a PW-2412WU power pack. Together they switch between two HDMI sources, scale the picture with a 4K scaler and extend video, audio and power over one CATx cable.

What is the difference between the DM-EXT-1021-1G-B KIT and DM-EXT-1021-1G-W KIT?

The difference is the colour of the wall plate transmitter's front overlay: the -B kit is black and the -W kit is white. Both kits have the same 2x1 switching, 4K scaling receiver, power pack and extension distances, so choose the colour that suits the room.

How is the wall plate transmitter powered?

The PW-2412WU power pack is included with the receiver and powers both units, because power is extended over the CATx cable along with video and audio. No separate power pack is included for the wall plate transmitter. Typical power consumption is 14.8 W.

What does the wall plate transmitter mount in?

The HD-TXC-4KZ-101-1G mounts in a 1-gang or larger electrical box, or a plaster ring, 57 mm (2.25 in) deep. The box or ring is not included. It has a metal housing and bracket with a black or white polycarbonate front overlay. When replacing a wall plate, check the existing box against this requirement.

How far can the DM-EXT-1021-1G extend HDMI?

Over CAT5e or higher cable it reaches up to 70 m (230 ft) for resolutions up to 2K, or up to 40 m (130 ft) for higher resolutions up to 4K. It handles 4K60 with 4:2:0 colour sampling and 1080p60 at 4:4:4, with EDID and HDCP 2.2 management.

How much is the Crestron DM-EXT-1021-1G?

Crestron asks its dealers to give the price of the DM-EXT-1021-1G directly rather than publish it online. Add it to your quote list and we will send you a written quote, with delivery, and installation and programming if you need them.

Can 1Install supply, install and programme the DM-EXT-1021-1G?

Yes. 1Install is an authorised Crestron Elite Partner with offices in Skerries, Co. Dublin and Cork. We can supply the DM-EXT-1021-1G on its own, or install, set up and programme it as part of your system. Installation visits are €440 for 4 hours or €880 for a full day, plus VAT and travel.

Does the DM-EXT-1021-1G come with a warranty?

Yes. Everything we supply is new, genuine Crestron with Crestron's standard warranty. If the DM-EXT-1021-1G develops a fault, contact us and we will handle the claim with Crestron. If we installed it, our workmanship is guaranteed for the lifetime of the system.

Is the DM-EXT-1021-1G in stock?

We order Crestron for each quote, so availability depends on Crestron's stock at the time. We check it before we quote and put the expected delivery date on your quote, so you know where you stand before you pay.

Can I buy the DM-EXT-1021-1G without installation?

Yes. We supply Crestron to end users, with or without installation. If you are not sure it suits your system, send us the part numbers you already have and we will check.

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