4-port Secure EAL4+ KVM, Dual Monitor HDMI 1.4, Audio


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End-Of-Life (EOL)
For stock: Contact Us
Replaced by: Vertiv Cybex Secure SC940DPH-400 Switch

Ports: 4 Computer Ports
Video Type: HDMI 1.4
Video Output: Dual Monitor
Features: Audio

Vertiv Cybex SC940H Brochure (PDF)
Vertiv Cybex SC940H Manual (PDF)

The Cybex SC940H secure desktop KVM is designed to meet the stringent specifications of the U.S. government and comply with the requirements of the latest NAIP protection profile for peripheral sharing devices version 3.0. The SC940H delivers proven security features such as unidirectional data diode technology, which assures complete network isolation while offering user-friendly, easy switching between sources. An active anti-tampering system and holographic tampering evident labels alert the user when the system has been physically compromised. Patented emulation technology prevents Display Data Channel (DDC) signal leakage; and guards against signal attacks.

Industry-leading security features are complemented with a range of capabilities and productivity features that make the Cybex SC940H a great investment. Experience true image reproduction with support for HDMI 1.4, which delivers resolutions up to UHD 4K (3840X2160 @ 30). NUM Lock, CAPS Lock and Scroll Lock indicators improve user interaction while maintaining unidirectional data flow from peripherals to PC. Additional usability features include, zero delay switching between connected sources and flexible assignment of audio devices.

The Cybex SC940H KVM switch delivers strong, effective security management designed to tightly control system and network access and deliver transparent security that does not impede user productivity

  • Outstanding security - Designed to meet the requirements of the latest National Information Assurance Partnership (NIAP) Protection Profile V3.0 for peripheral-sharing devices.
  • Discrete processing paths - Isolated ports on the switch provide discrete processing paths to each system, preventing data leakage, transfer or crosstalk between adjacent ports.
  • Unique NUM Lock, CAPS Lock and Scroll Lock indicators - While the Cybex series maintains unidirectional data flow, it also provides indicators that alert users when the NUM Lock, CAPS Lock or Scroll Lock is on to improve ease of use.
  • Gain true image reproduction and display flexibility - Cybex KVM switches offer the industry's broadest range of video connections. The SC940H supports HDMI 1.4, which delivers resolutions up to UHD 4K (3840X2160 @ 30 ).

SC940H KVM Back View

SC940H backview

Avocent SC940H-001 Specifications:

Height 2.2 in (56 mm)
Width 13.7 in (342 mm)
Depth5 in (125 mm)
Weight3.7 lbs (1.85 kg)
Video2 x HDMI 1.4
MAX ResolutionUHD 4K resolutions up to 3840x2160 @ 30 Hz
Operating Temperature32° to 104°F (0° to 40°C)
Storage Temperature-4° to 122°F (-20° to 50°C)
Humidity0-80% RH, non-condensing
Operating Voltage100 to 240VAC
Power Consumption35W Max Internal
Device Support
CertificationsRCM, EU, FCC Class B, VCCI, c-UL
Warranty3 Year

Avocent Cybex (by Vertiv) SC940H is also known as SC 940H

UPC / EAN Barcode icon
UPC 636430075204
EAN 0636430075204
Question: Does the SC940H have a DC adapter or does it do AC directly out the back?
Answer: Thank you for your inquiry,

The Avocent (by Vertiv) Cybex SC940H has the DC adapter built in - you would plug in a AC cord directly into the unit.

Question: Will the Avocent SC940H-001 allow for displayport to HDMI cable input? we have tried DVI to HDMI with no success.
Answer: Thank you for your inquiry. It is interesting that the DVI to HDMI did not work. As long as the signal is DVI-D (digital) it should be compatible. In fact, one of the cable options for this particular model includes DVI-D as a connection option to the computer. (There may be resolution/refresh rate issues as DVI-D doesn't have the same bandwidth as HDMI)

Unfortunately, DisplayPort compatibility is pretty hit or miss, depending on what version of DisplayPort is being used. Sometimes a passive adapter cable will work, but more often than not, an active converter is needed.

We reached out to our Vertiv (formerly Avocent) contact and he was not aware of any issues, but mentioned that the SC940-001 was specifically for DVI-I targets, the SC940H-001 for HDMI targets and the SC940D-001 was for DisplayPort. He wasn't sure if any functionality would be lost using adapters (for DVI or DisplayPort).

Detailed product support is beyond the scope of this FAQ. Having said that, we would suggest checking to make sure the DVI connection/output is digital adn of an appropriate resolution for DVI-D. If the connection still fails, our Vertiv contact recommended reaching out to their support team at 1-888-793-8763. They may know of issues concerning signal adaptation he is not aware of.

Vertiv also provides a robust support community that is a great resource for end users to get answers. You can find the support community here: https://vertivco-eng.custhelp.com/app/community

Question: Does the SC940H come with cables, or do they need to be purchased separately?
Answer: Thank you for your inquiry. For the greatest flexibility, these switches do not come with cables. The 6ft cable is the CBL0114 and the 10ft version is the CBL0115.