USB/PS2 KVM Switches
with OSD and Daisy-Chain

  • High video quality. VGA resolution up to 2048 x 1536
  • USB and PS/2 interface support on both console and PC side
  • Perfect keyboard and mouse emulation to ensure compatibility to machines and operating systems
  • One controller per port to keep mouse and keyboard alive even when the KVM is not powered on
  • Up to 8 units can be daisy-chained without video quality loss. Much better than cascade systems
  • IP connectivity when the head of the daisy-chain is a PRIMA-IP model
  • Global daisy-chain capacity scalable up to 128 PCs (8 x Prima 16)
  • Support of Microsoft and Logitech standard 5-key mice and compatibles
  • Port selection and operation using front-panel push buttons, keyboard hotkey's and OSD Menu
  • Digital display and LED indicators for easy status monitoring
  • User Password protection and auto-logout timeout
  • Firmware in Flash for easy upgrade
  • Metal casing, 19" rack industrial format
  • One-year warranty and free technical support

PRIMA-4 PRIMA-8 and PRIMA-16 are three high-quality conventional KVM switches intended for computer and server management in corporate, factory as well as in campus computing environments.

USB and PS/2 Interface on Both Console and PC Sides: PRIMA KVM switches support both USB and PS/2 interfaces on both console and PC sides. This is especially useful when old computers with only PS/2 interfaces are cohabiting with newer computers equipped with only USB interfaces.

OSD Menu: The intuitive OSD menus permit to select the active computer port and to access all command and setup functions such as login, firmware upgrade and auto-scanning.

Auto Scanning:  When this function is running, PRIMA switches automatically from each computer to the next one into the daisy-chain. Each computer is selected during a period of time that is programmable through OSD menu (5 to 95 sec).

Daisy-Chain: The daisy-chain system is totally different from simple port cascade that most of competitor provide. It permits to maintain the same high video quality whatever how many devices are inter-connected. Up to 8 PRIMA switches can be attached together increasing the possible number of computers to 128. If the first switch of the daisy-chain is a PRIMA IP model, all attached computers can be controlled locally and remotely via an IP secure SSL connection.


Metal Enclosure: The PRIMA KVM switches are robust and durable. Their metal enclosure provides better shielding against electromagnetic interferences commonly seen in lab or factory environments.

Firmware Upgrade: The PRIMA firmware is stored in Flash memory and can be upgraded locally via a serial RS232 connection, or remotely if a PRIMA-IP is driving the daisy-chain. Thus, your investment on this KVM switch is further ensured and its life-time value just maximized.

Cable Assembly: Clean cable assemblies integrating VGA, PS/2 and USB attachments permit to connect the computers to the PRIMA computer ports. They are available in 1.2m, 3m, and 5m lengths.

Delivery: PRIMA KVM switches are delivered with all their accessories (power adapter, daisy-chain cable and rack mount kit).

Warranty and Technical Support: Prosum provides one year warranty and free technical support.

Computer Ports

4 / 8 / 16 ports, according to the model.
One controller per port powered by the computer interface for USB/PS2 keyboard
and mouse live emulation.

Computer Port Connectors

HDB15-pin Male + special cable assembly providing VGA, PS/2 and USB
mouse and keyboard connectors.

Local Console Port


Local Console Connectors

PS/2 Keyboard 6-pin Mini Din female

PS/2 Mouse 6 pin Mini Din female

VGA HDB 15-pin female

2 x USB Type A for USB mouse and keyboard

Daisy-Chain Ports

Daisy Chain Out (video in): HDB 15-pin female

Daisy Chain In (video out): HDB 15-pin male

Max Video Resolution

2048 x 1536

Max Computer Cable Length

5m ( 10m with small video quality degradation).

Max Daisy-Chain Total Length


OSD Menu

15 lines of 30 characters

Port Selection

Push button (one per port), keyboard hot keys (can be selected), OSD menu

IndicatorsTwo LED's per port
Two digits 7-segment display


Port switching confirmation. Can be disabled.

Power supply

External DC 9V 1A Power Adapter

Operation Temperature

0 to 50°C


0 to 90%, non-condensing



Power supply

External DC 12V 2A

Operation Temperature

0 to 50°C

Storage Temperature

-20to 60°C


0 to 90%, non-condensing



Dimension(L x W x H)

410 x 165 x 44.5mm (1U)

Weight (g)

2100, 2150, 2300

Safety / EMI Certification


PRIMA KVM switches come with the power adapter, the daisy-chain cable, the upgrade cable and the rack-mount accessories.

prima cable

Cable assemblies integrating VGA, PS/2 and USB attachments must be bought independently according to the distances to computers. These cables include the VGA, PS/2 and USB attachments. they are equipped with connectors that can plug to most popular computers.

  • KVM side : Only one HDB15-pin male connector for VGA, USB and PS/2 connections.
  • Computer side : HDB15 male blue VGA connector, MiniDin6 purple PS/2 keyboard connector, and USB type A connector.

To connect a computer using the USB interface, plug only the USB connector. The mouse and keyboard are combined by the KVM into a single composite device that needs only one USB interface. Do not plug the purple PS/2 connector.

To connect a computer providing only PS/2 interfaces, plug the purple connector into the keyboard input, and the USB connector into the mouse input by using the green adapter supplied with the cable.

These cables are available in 1.8m, 3m, and 5m lengths.





pdf User Manual

pdf Data Sheet

Last firmware version (12-feb-2009): Download it

In case of problem contact:

email: This email address is being protected from spambots. You need JavaScript enabled to view it.

telephone: +33 1 45 90 62 70