FAQ - Posts - Page 2 - Sealevel Systems, Inc

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 … View More

Sealevel FAQ: SeaI/O and eI/O Products and Blue Iris Software

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 utiliz … View More

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 … View More

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 … View More

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 … View More

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 … View More

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 … View More

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 … View More

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 … View More

What is the difference between “interface” and “protocol”?

May 20th 2022

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 … View More

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 … View More

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 … View More

Where can I download SeaCOM for Windows XP?

Feb 1st 2022

You can locate SeaCOM 3.6.17 for Windows XP here. 11.5 MB .exe file

What is the difference between positive and negative logic in digital I/O circuits?

Nov 13th 2021

“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 … View More

Do you have a LabView driver for Sealevel SeaI/O or eI/O devices?

Mar 12th 2021

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 … View More

What programming languages can I use with SeaMAX for Windows to control Sealevel SeaI/O and eI/O digital and analog I/O devices?

Mar 4th 2021

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 … View More

FAQ: Can the electromechanical relays on the SeaConnect 370 reliably switch a micro-current signal after switching a medium load?

Sep 20th 2017

No, they cannot. Medium loads wear through the contacts’ gold plating, which is what enables the micro-current switching capability. Beneath the gold plating i … View More

FAQ: What’s unique about the relays used on the SeaConnect 370?