High-Level Data Link Control (HDLC) takes Synchronous Data Link Control (SDLC) one step further.HDLC defines the content of the control byte, allowing the transmitt
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Resource Center
Synchronous Data Link Control (SDLC)
Sep 13th 2022
Synchronous Data Link Control, also known as SDLC, is a protocol that can be used for talking between computers or between computer and a remote device.It’s very simp
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FAQ: Blue Iris
Aug 31st 2022
Sealevel’s SeaI/O and eI/O devices are frequently used in conjunction with Blue Iris Video Management Software. Many customers have been able to successfully utilize
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Bisynchronous communications
Aug 30th 2022
Bisynchronous communications have a 16-bit synchronization sequence at the beginning of the message. The rest of the message is formatted using characters like start
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Monosynchronus Communications
Aug 16th 2022
Monosync communications, as the name implies, has one sync character, 1 8-bit scene character.The problem with this is the fact that an 8-bit sequence can very easily
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Sync Serial Cards: 5104 vs 5102
Aug 3rd 2022
The 5104 is our highest speed sync card. For high-speed communications, it is the perfect solution. Unfortunately, if you’re using async mode it’s not necessarily our
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Asynchronous vs Isochronous Communications
Jul 20th 2022
Asynchronous communication is a timed communication standard. Each bit has a particular width and time that it needs to be stable. Isochronous communication does no
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Synchronous vs Asynchronous cards
Jul 5th 2022
There are three main differences between our async and sync cards. The first is cost. Our asynchronous cards are very cost competitive. Our synchronous cards are al
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What is synchronous communication?
Jun 24th 2022
Asynchronous communication is what everyone is used to. Every device you normally connect to a computer is going to be using asynchronous communication. It’s a time
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What is asynchronous communication?
Jun 9th 2022
The important thing with asynchronous communication is the fact that since it is time-based, the transmitter and the receiver both have to be very accurately timed
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If you want to send a letter to someone in Germany, the interface is the way that you decide to send the letter. The protocol is actually the content of the text that
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Why is my SeaLINK USB serial adapter or HazPAC 10 Rugged Panel PC (Part #H1400811) serial port not working in Linux?
Mar 9th 2022
If your serial port is not working in Linux, please reference this article to learn how to configure USB serial adapters in Linux. USB Serial AdaptersHazPAC 1
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My Ethernet Serial Server is missing from the SeaLINK Device Discovery utility. How do I find it?
Feb 2nd 2022
The most common solution is to disable all network adapters except for the one connected to the Ethernet Serial server, then try searching for the Ethernet Serial ser
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Where can I download SeaCOM for Windows XP?
Feb 1st 2022
You can locate SeaCOM 3.6.17 for Windows XP here.
Driver Downloads
Dec 2nd 2021
Where can I find the correct driver download for my Sealevel product?
Begin by referencing the Base Part Number Range Guide below or visit our interactive
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“When a circuit requires logic 1 to operate, engineers may refer to this condition as positive logic. Thus, the more positive voltage causes the action to take plac
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We recommend using Sealevel SeaI/O and eI/O devices with LabView in combination with one of the available options to give LabView the ability to communicate via the M
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SeaMAX for Windows provides both a .NET DLL and a native DLL with nearly identical capability to control these device types. The .NET DLL should be accessible f
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