KVM Switches

A KVM (keyboard, video and mouse) switch, sometimes referred to as a server switch or CPU switch, is a hardware device that enables one or more users to reliably control a number of computers using a single keyboard, monitor (video display) and mouse. KVM switches are increasingly popular for managing multiple systems efficiently, and some advanced models, known as KVM switch dual monitor setups, even control multiple computers.

Models vary by video interface, port count, number of displays and mounting style, from desktop units to rack-mounted and over-IP versions. RS Singapore offers KVM switches online from brands such as Trendnet, NewLink, StarTech.com, and RS PRO, among many others. Orders on locally stocked items qualify for next working day delivery.

When Are KVM Switches Used?

KVM switches may be used during the following scenarios:

• Control Multiple Computers: KVM switches are commonly used in environments when you need to control multiple computers like in a data centre. With a single switch, the administrator can alternate access from one computer to another on a single monitor.
• Multi-User Computer Control: Multiple users can control one to many shared computers, enabling cross-functional access to data by using a KVM Matrix switch.
• Control of Multiple Operating Systems: KVM switches enable users to switch across multiple operating systems such as Microsoft Windows, Mac, Linux.
• Home Office and Small Office Desks: One keyboard, mouse and monitor can be shared between a work laptop and a personal desktop, switching between them at the touch of a button without a second set of peripherals.

What Are the Different Types of KVM Switches?

• DisplayPort KVM Switch: Growing in popularity as display manufacturers move away from DVI-I and VGA, DisplayPort models suit peripheral sharing, and dual DisplayPort versions can share USB peripherals across all computers.
• DVI KVM Switch: Designed for DVI-compatible monitors, these deliver reliable digital video and overcome VGA resolution limits. They work with single or dual link DVI-D or DVI-I and can also offer reverse compatibility.
• HDMI KVM Switch: Ideal for switching HDMI signals without affecting video quality, with quick, uninterrupted switching. They are commonly used in broadcasting, medical imaging, home and commercial theatres and digital signage.
• USB KVM Switch: A common type that uses USB cables for keyboard, video and mouse connections, with some models also supporting PS/2, audio sharing and wireless connectivity. Modern USB-C versions add high-speed data transfer and power delivery.
• KVM-Over-IP Switch: These units let users access or monitor multiple PCs and servers over a dedicated network, LAN or WAN from anywhere with IP remote access. They are mostly found in medium or large data centres.
• Multi-Display KVM Switch: Built for extended desktops across several displays, these accept VGA, DVI, HDMI and DisplayPort inputs, including mixed configurations. Each KVM switch supports a set number of monitors, from dual displays to four or more.
• Multi-User KVM Switch: Multiple users can access the connected computers at the same time from different locations, through extension, over-IP access or both. They suit enterprise applications where cross-platform switching and collaboration are essential.
• Rack Console KVM Switch: Rack consoles combine a display, keyboard and touchpad in a pull-out drawer to save space in server racks. Some include an integrated KVM switch to control multiple servers, so check that the mounting rails suit your rack.

What to Consider When Buying a KVM Switch

• Consider Your Setup: Count the computers, monitors and peripherals (keyboard, mouse, printer, webcam, speakers, microphone) you plan to use. Most KVM switches support 2-4 computers, 1-3 monitors and 2-4 peripherals.
• Check Computer Ports: Note which ports your computers use (HDMI, VGA, DisplayPort, USB-A or USB-C) and match the switch’s video output to your monitors. Our guide to HDMI cables and USB cable handbook can help you choose the right cables.
• Resolution and Refresh Rate: Make sure the switch supports your display’s native resolution and refresh rate. 1080p at 60Hz is common, but 4K or 1440p needs specific support.

Industrial Applications of KVM Switches

KVM switches give industrial users efficient control of multiple computers or servers from a single workstation.

• Data Centres and Server Rooms: IT administrators control numerous servers from a single console and switch quickly between systems for maintenance, with fewer peripherals needed per rack.
• Industrial Control Systems: Operators monitor and control multiple production lines from a centralised workstation, and manage industrial PCs and PLCs (Programmable Logic Controllers) through one interface.
• Healthcare and Medical Imaging: Radiologists view images from multiple imaging devices with one set of peripherals, while operating rooms and laboratories do the same with medical devices and instruments.
• Energy and Utility Management: Power plants and utility control rooms monitor generation and distribution and manage SCADA (Supervisory Control and Data Acquisition) systems, with quick access to multiple systems in an emergency.

Why Choose RS for KVM Switches

RS is a trusted supplier and distributor of KVM switches from leading brands such Aten, StarTech.com, Rextron, and more, as part of a range of more than 750,000 products from over 2,500 suppliers. To place an order online, browse our extensive catalogue where you can filter and select your preferred products based on your specifications.

RS Singapore offers fast delivery of KVM switches and related computing peripherals. With more than 20,000 items stocked locally in its Singapore warehouse, RS offers free next working day delivery on these items ordered online Monday to Friday before 3:30pm. Online orders over $28 (ex GST) also qualify for free delivery. For more details on delivery services and fees, please refer to our Delivery Page.