ATEN VS0401 4-Port VGA Switch with Audio
Overview
The ATEN VS0401 is a 4-port VGA video switch that consolidates up to four VGA video sources — each with stereo audio — onto a single display. Designed for control rooms, training environments, boardrooms, and AV rack installations where multiple computers or video sources need to share one monitor without manually swapping cables, the VS0401 keeps signal paths clean and switching reliable. It supports RS-232 serial control, which means it integrates into automation systems and control processors rather than relying solely on front-panel button presses — a key differentiator for any managed AV or security operations environment.
The unit ships with firmware v1.1.106 (released 2019-11-28) and a Windows RS-232 Control Tool (v1.0.064), giving installers a software interface for commissioning and testing without needing a hardware controller on day one. For a full look at the ATEN AV and KVM product line, the VS0401 sits within ATEN's signal distribution family alongside splitters and matrix switches.
Key Features
- 4-to-1 VGA Source Switching: Route any of four VGA input sources to a single display output. In a security operations center or training room, this eliminates the need for multiple monitors or manual cable swaps — one display, four sources, clean switching on command.
- Integrated Stereo Audio Switching: The VS0401 carries audio alongside video — a 3.5mm stereo output (green Mini Stereo Jack) keeps audio synchronized with the selected video source. No separate audio switcher or manual audio re-patching required when the operator changes sources.
- Dedicated Audio Input Port: A second 3.5mm jack (black Mini Stereo Jack Female) provides a discrete audio input path, giving installers the flexibility to handle audio routing independently from the video signal if the deployment demands it.
- RS-232 Serial Control: Native RS-232 control support means the VS0401 can be integrated into Crestron, AMX, or any RS-232-capable automation system. The included Windows RS-232 Control Tool (v1.0.064) lets you configure, test, and script switching commands directly from a PC — useful during commissioning before the automation system is fully online.
- DC Power Input: Powered via a single DC jack — straightforward to provision in a rack or equipment closet with a shared power strip or UPS. No PoE dependency, no proprietary power connector.
- Rack-Mount Form Factor: The VS0401 is designed for rack installation, keeping it organized in AV equipment racks or server rooms. Maximum cable run from source to switch is 1.8 m — plan your rack layout to keep source devices within that distance.
- Operating Humidity Tolerance: Rated for 0–80% RH non-condensing, so it handles typical indoor rack and equipment closet environments without issue. Not rated for outdoor or high-humidity industrial spaces — keep it in a climate-controlled enclosure.
- Updatable Firmware: The v1.1.106 firmware (November 2019) is the current release. Firmware update packages are available from ATEN, allowing field updates if future compatibility improvements are released without requiring hardware replacement.
Integration and Compatibility
The VS0401 connects to any VGA-equipped source — workstations, DVRs, legacy NVRs, video processors, or matrix outputs that carry a VGA signal. The RS-232 port makes it compatible with automation platforms that support serial control, and the included Windows control tool supports configuration on any Windows PC. For environments building out a VGA signal distribution system, the VS0401 pairs logically with VGA extenders or distribution amplifiers downstream of the single output. If your deployment requires PoE-powered network infrastructure alongside signal switching, see the PoE network switch catalog for complementary hardware. A VGA and AV switching guide can help you determine whether a 4-port switch, matrix, or splitter is the right topology for your specific source-to-display ratio.
Frequently Asked Questions
Q: What is the maximum cable distance between a VGA source and the VS0401?
A: The VS0401 supports a maximum distance of 1.8 m between the source device and the switch. Plan your rack or desk layout accordingly — sources need to be within arm's reach of the unit.
Q: Can the VS0401 be controlled remotely without pressing the front-panel buttons?
A: Yes. The VS0401 includes an RS-232 control port. ATEN provides a Windows RS-232 Control Tool (v1.0.064) for PC-based switching, and the serial port is compatible with automation controllers such as Crestron or AMX that support RS-232 commands.
Q: Does the VS0401 switch audio along with video?
A: Yes. The VS0401 includes a 3.5mm stereo audio output (green jack) that switches in sync with the selected VGA source. There is also a separate 3.5mm audio input jack (black) for independent audio routing if needed.
Q: What firmware version does the VS0401 ship with, and can it be updated?
A: The current firmware is v1.1.106, released 2019-11-28. ATEN provides firmware update packages for field installation, so the unit can be updated without hardware replacement.
Q: Is the VS0401 suitable for outdoor or industrial environments?
A: No. The VS0401 is rated for 0–80% RH non-condensing humidity and is designed for indoor rack environments. It is not rated for outdoor installation or high-humidity industrial spaces.
Q: How many units come in a carton?
A: Carton lot size is 5 units, which is useful to know for project-quantity procurement or stocking orders.
The VS0401 is one of those devices that solves a very specific rack-room problem: you have four VGA sources and one display, and you need switching to be automatable rather than manual. The RS-232 control port is what sets this apart from a passive selector box — once you wire it into a Crestron or AMX processor, source switching becomes a programmed event rather than an operator task.
Technical Highlights:
- RS-232 Control Port: Enables integration with serial-capable automation controllers. The bundled Windows RS-232 Control Tool (v1.0.064) is a genuine time-saver during commissioning — you can verify switching logic from a laptop before the control system is programmed.
- Synchronized Audio Switching: The 3.5mm stereo output (green jack) switches audio in lock-step with the VGA source. In a training room or briefing environment, this prevents the disorienting mismatch of video from one source playing with audio from another.
- Firmware v1.1.106: Released November 2019, this is the current production firmware. The update mechanism means you are not locked to factory firmware if ATEN issues a compatibility patch for newer control systems down the road.
Deployment Considerations:
- The 1.8 m maximum source-to-switch distance is the constraint most installers underestimate. In a rack deployment, all four source devices must be physically close to the VS0401 — long VGA runs belong upstream of the switch, not between source and switch input.
- This is a VGA-only device. If any of your sources output HDMI, DisplayPort, or DVI natively, you will need active conversion before the VS0401 input — passive adapters at VGA resolutions can introduce signal quality issues worth testing before final installation.
The VS0401 is the right call for legacy AV rack environments — security operations centers running older DVR outputs, training facilities with mixed PC and video playback sources, or any installation where VGA is the common denominator and RS-232 automation is already in place. It is not the answer if you are building a new-construction HDMI/4K environment.
