What it is for
Selects between several video and USB sources and sends one on. Used in Hybrid meeting room.
Installed by year
Ports
17 portsUSB-A4HDMI42 in, 2 outTerminal block41 in, 1 outUSB-B2USB-C13.5 mm11 outRJ451
Front
Rear
USBVideoOtherAudioPoEPower
Every port, in detail
| # | Port | Connector | Carries | Direction | Where |
|---|---|---|---|---|---|
| 1 | usb-a-1USB DEVICE port 1 for local USB peripherals (e.g. keyboard/mouse, PTZ camera). Device charging max total 2A shared across USB device ports. | USB-A | USB | Both ways | Front |
| 2 | usb-c-1Input 1: DP Alt Mode AV input, USB 3.2 host link to the switched peripherals, LAN access, and USB PD 3.0 charging of the source (60W max, only when powered by the 20V supply). | USB-C | video, audio, USB, ethernet, power | Both ways | Front |
| 3 | hdmi-in-2HDMI source input 2. | HDMI | video, audio | In | Front |
| 4 | usb-b-2USB 3.2 host connection paired with HDMI input 2 (e.g. room PC). Numbered 2 after the IN 2 group label on the panel. | USB-B | USB | Both ways | Front |
| 5 | hdmi-in-3HDMI source input 3. | HDMI | video, audio | In | Front |
| 6 | usb-b-3USB 3.2 host connection paired with HDMI input 3. Numbered 3 after the IN 3 group label on the panel. | USB-B | USB | Both ways | Front |
| 7 | hdmi-out-1Main HDMI output. | HDMI | video, audio | Out | Rear |
| 8 | hdmi-out-2Loop output mirroring the active input, for a local monitor or daisy chain. | HDMI | video, audio | Out | Rear |
| 9 | usb-a-2USB DEVICE port 2. | USB-A | USB | Both ways | Rear |
| 10 | usb-a-3USB DEVICE port 3. | USB-A | USB | Both ways | Rear |
| 11 | usb-a-4USB DEVICE port 4. | USB-A | USB | Both ways | Rear |
| 12 | ir-1IR output to an IR emitter, driven by commands from a LAN-connected controller. | 3.5 mm | ir | Out | Rear |
| 13 | audio-out-15-pin terminal block (L+ L- G R+ R-), balanced stereo line-level de-embedded audio. | Terminal block | audio | Out | Rear |
| 14 | gpio-1Two GPIO channels S1 and S2, configurable as digital in, digital out or analog in. Drawing shows S1 S2 G Rx Tx as one 5-pin block shared with RS-232. | Terminal block | gpio | Both ways | Rear |
| 15 | rs232-1RS-232 to control a device (e.g. PTZ camera) from an IP-connected controller. Pins G Rx Tx; see gpio-1 note on shared block. | Terminal block | rs232 | Both ways | Rear |
| 16 | lan-1LAN connection and PoE power input. | RJ45 | ethernet, PoE | Both ways | Rear |
| 17 | power-inDC input for the included 20V 6A supply or optional 12V supply. Drawing shows a 2-pin +/- plug connector rather than a barrel jack. | Terminal block | power | In | Rear |
Spaces using it
9 spacesCHI 12.08 Barn OwlCPH 4.07 PeregrineDUB 3.09 Whooper SwanLON 2.03 CurlewMEL 8.08 Barn OwlNYC 20.10 Whooper SwanNYC 21.05 SkylarkSIN 12.03 CurlewTOR 7.03 Curlew
Space types that use it
9 units in 9 spaces at 8 officesNotes
- From hardware revision 02 a 20 V 6 A adapter ships instead of 12 V, which allows 60 W USB-C charging.
- The manual captions both panel drawings "Front Panel"; the second is the rear, per the connection instructions.
- The optional 12 V adapter is rated 2 A in the spec table and 5 A in the panel table.
- Weight: manual 0.56 kg, product page 0.6 kg.
What the manufacturer doesn't say
- The PoE input is given only as 7.8 W, with no standard or class.
- USB-A charging is given only as 2 A shared.
Sources
- SWT3-31-HU 3x1 4K60 USB-C/HDMI Switcher - Kramer
Specifications - SWT3-31-HU User Manual, P/N 2900-301609 Rev 13
Port labels, faces and panel layout - Kramer SWT3-31-HU product page (kramerav.com)
Specifications
Each model was read twice, independently, and the two readings reconciled against the manufacturer's text.