Sealevel’s 7203e does have onboard dip switches that would allow you to turn off the 102 Ohm resistor; the 120 Ohm resistor can be changed throug
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Versatile Communications and I/O for Rugged Industrial Computers
Posted by Drew Thompson on Oct 20th 2023
Rugged industrial computers are built to withstand and work in extreme conditions that either limit the functionality of normal consumer grade PCs or cause them to c
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I/O in a Minute: parity, checksum, and CRC
Nov 1st 2022
In this episode of “I/O in a Minute,” resident expert Frank Phelps goes over parity, checksum, and cyclic redundancy check (CRC).
Parity, checksu
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I/O in a Minute: Raw Mode
Oct 11th 2022
In this episode of “I/O in a Minute,” resident expert Frank Phelps discusses Raw mode.
Raw Mode FAQ page
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I/O in a Minute: SDLC vs HDLC
Sep 27th 2022
In this episode of “I/O in a Minute,” resident expert Frank Phelps discusses Synchronous Data Link Control (SDLC).
SDLC vs HDLC FAQ page
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I/O in a Minute: Synchronous Data Link Control (SDLC)
Sep 13th 2022
In this episode of “I/O in a Minute,” resident expert Frank Phelps discusses Synchronous Data Link Control (SDLC).
Read More Serial FAQs
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I/O in a Minute: Bisynchronous Communications
Aug 31st 2022
In this episode of “I/O in a Minute,” resident expert Frank Phelps discusses bisynchronous communications.
Read More Serial FAQs
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I/O in a Minute: Monosynchronus Communications
Aug 16th 2022
In this episode of “I/O in a Minute,” resident expert Frank Phelps goes over monosynchronous communications.
Read More Serial FAQs
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I/O in a Minute: Sync Serial – 5104 vs 5102
Aug 3rd 2022
In this episode of “I/O in a Minute,” resident expert Frank Phelps goes over the differences between sync serial cards 5104 and 5102.
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In this episode of “I/O in a Minute,” Frank Phelps goes over the differences between asynchronous and isochronous communications.
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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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I/O in a Minute: Synchronous vs Asynchronous Cards
Jul 5th 2022
In this episode of “I/O in a Minute,” Frank Phelps goes over the differences between synchronous and asynchronous cards.
Read More Serial FAQs
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I/O in a Minute: Asynchronous Communications
Jun 9th 2022
In this episode of “I/O in a Minute,” Frank covers the basics of asynchronous communications and unlocks the mystery of that connector on the back of your
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I/O in a Minute: Interface vs Protocol
May 20th 2022
In this installation of “I/O in a Minute,” resident expert Frank Phelps shares the key differences between the common terms “interface” and “protocol.” Phelp
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How Does the IoT Talk: Communications Networks for Iot Applications
Posted by Leah VanSyckel on Apr 18th 2018
The internet has moved from sitting on our desk tops to watching over our warehouses, riding in our truck beds, and floating in our underwater farms. Every day, the
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New SeaRAQ Expansion Boards Enable Computer Control and Monitoring Applications
Posted by Davis Orders on Mar 14th 2014
Sealevel Systems, Inc. announces the SeaRAQ family of I/O expansion boards designed for Relio R3 rackmount industrial computers. SeaRAQ boards interface to a varie
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Serial I/O – Just as Useful Today
Posted by Earle Foster on Aug 2nd 2013
With many things, newer doesn’t necessarily mean better. Automobiles are a good example. Porsche remains the measuring stick in sports cars, yet the design of today’s
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New PCI Express with Two Optically Isolated Serial Ports
Posted by Jane Van Bergen on May 24th 2013
Sealevel’s 7203e PCI Express serial interface provides two optically isolated serial ports, each individually configurable for RS-232, RS-422, or RS-485. Eac
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