Avocent Cybex SC940DP
Best secure KVM switch for government and high-security office environments.
The Avocent Cybex SC940DP is a secure desktop KVM switch built to meet stringent U.S. government security standards, including NIAP Protection Profile V3.0. It ensures complete network isolation with unidirectional data diode technology and supports dual monitors via DisplayPort 1.2, delivering UHD 4K resolution at 30Hz. Enhanced security features include an active anti-tampering system and patented emulation to prevent DDC signal leakage. This KVM switch offers zero-delay switching and audio support, combining high-level security with essential user productivity.
$1584.71
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Owner Satisfaction
4.7
/ 5
Category Rank
1
/ 1363
Best KVM Switches
Price vs Category Average
+46%
Above average
Ports
4
/ Computer Ports
Who it's for
- Security professionals managing sensitive government or corporate data
- Creative professionals requiring crisp, high-resolution multi-monitor setups
- IT administrators prioritizing hardware integrity and physical system protection
Who should skip it
- Budget-conscious buyers seeking standard office hardware solutions
- Users relying on specialized USB peripherals like headsets or drives
- Home office users needing simple, plug-and-play device connectivity
Performance breakdown
Security Compliance
NIAP Protection Profile V3.0 certification ensures top-tier defense for sensitive environments.
Network Isolation
Unidirectional data diodes provide a physical barrier against cross-network data leakage.
Visual Fidelity
Dual 4K support is excellent, though 30Hz refresh rates feel slightly dated.
Switching Speed
Zero-delay switching maintains seamless productivity across all four connected systems.
Physical Security
Active anti-tampering mechanisms provide robust protection against unauthorized hardware access.
Build Quality
Rugged construction designed to withstand the rigors of high-security professional workspaces.
Key Specs
Ports
4 Computer Ports
Video Output
Dual Monitor (DisplayPort 1.2)
Maximum Resolution
UHD 4K resolutions up to 3840x2160 @ 30 Hz
Dimensions
13.7 in (W) x 5 in (D) x 2.2 in (H)
Weight
3.7 lbs
Operating Voltage
100 to 240VAC
Certifications
RCM, EU, FCC Class B, VCCI, c-UL
Warranty
3 Year
Features
- Meets NIAP Protection Profile V3.0 security standards
- Unidirectional data diode for network isolation
- Active anti-tampering system for physical security
- Patented emulation prevents DDC signal leakage
- Supports dual monitor output via DisplayPort 1.2
- Zero-delay switching between sources
- Includes NUM/CAPS/Scroll Lock indicators
- Supports audio device assignment
What customers say
Customers overwhelmingly praise the Avocent Cybex SC940DP for its unparalleled security and robust reliability, essential for high-security environments requiring NIAP PP 3.0 compliance. Reviewers highlight the absolute air-gap separation achieved through tamper-evident seals and secure data diode technology as key differentiators. Performance is excellent, with users noting flawless video quality, even at high resolutions like 4K, without any noticeable latency. While the initial investment is premium, users consider this mission critical infrastructure a worthwhile purchase for guaranteed compliance and peace of mind. It is widely regarded as the industry benchmark for secure KVM switching due to its dependable operation.
Know before you buy
This KVM switch is built to meet the stringent NIAP Protection Profile V3.0 security standards, ensuring it is suitable for high-security environments that require rigorous network isolation.
Yes, the SC940DP is designed for dual monitor configurations using DisplayPort 1.2 connections, supporting resolutions up to 3840x2160 at 30Hz.
It utilizes unidirectional data diode technology to ensure data flows in only one direction, combined with patented emulation that prevents DDC signal leakage between the connected computers.
The device features an active anti-tampering system. If the casing is compromised or tampered with, the unit is designed to permanently disable itself to protect the integrity of your secure network.
Yes, the switch includes a 3.5mm audio jack and supports audio device assignment, allowing you to route audio from your selected computer source to your speakers or headset.
No, the SC940DP is engineered for zero-delay switching, allowing you to toggle between your four sources instantly without performance interruptions.
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$1585