The below steps to access the BIOS menu are the same for Relio R2, Relio R3 or SBC-R9 embedded computer. Attach a USB keyboard to the computer.Apply power and immedi
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Resource Center
How do I reset the BIOS on my Relio R1 embedded computer when I cannot see the display?
Jun 29th 2023
To reset the the BIOS of the Relio R1 Embedded Computer, follow these steps:Attach a USB keyboard to the computer.Apply power and immediately press and hold the Dele
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What is optical isolation and why is it beneficial?
Jun 27th 2023
Optical isolation is a technique that protects electronic devices and circuits from ground loops, power surges, and electromagnetic interference. Duplicate groun
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Parity, Checksum, and Cyclic Redundancy Check (CRC)
Nov 1st 2022
Parity is actually an extra bit that’s added to every data word. It can detect a one bit error within that data or byte Checksum is a sum all of the c
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Raw Mode or Bit-Shift Mode
Oct 11th 2022
Raw mode is actually the simplest form of communication. The card takes every bit of data that’s received from the communication line, groups it into 8 bit bytes
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LabVIEW has a Modbus library and can be used with any device that supports Modbus. For Sealevel products, LabVIEW can be used with our eI/O adapters, SeaDAC digital
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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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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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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
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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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