Serial - Posts - Page 2 - Sealevel Systems, Inc

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

How to resolve communication issues affecting Sealevel’s XR17V35X based serial devices (7xxxec serial cards, 7106e, Relio R1)?

Aug 19th 2020

The following devices are based on the XR17V35X and are known to be impacted by the GPIO configuration issue described in this article: 7xxxec serial cards 7106e Rel … View More

Manual: 5104e

Aug 19th 2017

Downloads: 5104e - 5104eS User Manual Size: 569.22 KB Type: pdf Article Specifications: Related Models: 5104e Product Manual for Sealeve … View More

Can Sealevel synchronous serial expansion boards and Relio R2 Sync Server communicate using SDLC or HDLC-derived protocols?

Jan 20th 2017

Sealevel synchronous serial expansion boards and the Relio R2 sync server have an SDLC mode that implements many low-level behaviors of SDLC such as frame open … View More

Can I use a PCI or PCIe serial port as a replacement for COM1?

Nov 1st 2016

Using Sealevel’s COM Port Manager utility provided with our SeaCOM software suite, a PCI or PCIe serial port can be named “COM1.” After that … View More

Can I use Sealevel synchronous serial adapters with Linux?

Nov 1st 2016

Sealevel SeaMAC software is used to enable Linux support for products which feature the Zilog® Z85230 Enhanced Serial Communications Controller (ESCC). Our Route … View More

How can I test to see if data is going through my serial tunnel?

Oct 18th 2016

A serial tunnel is formed by two Ethernet serial servers that transmit data received by the local serial port through a TCP/IP connection out through the rem … View More

When should I use the RFC 2217 mode of my SeaLINK Ethernet serial server?

Oct 18th 2016

RFC 2217 is a popular protocol for accessing serial ports over a network. A server that uses RFC 2217 allows its serial port to be controlled through the n … View More

Manual: 3054

Oct 1st 2016

Downloads: 3054-User-Manual Size: 524.03 KB Type: pdf Article Specifications: Related Models: 3054 Product … View More

How do I configure a synchronous serial PCIe or PCI card for loopback testing under Windows?

Sep 16th 2016

The WinSSD utility of SeaMAC for Windows gives you access to all the communication options of Sealevel PCIe and PCI synchronous serial cards necessary to creat … View More

How does the SeaMAC Configuration Utility help me develop a new application that uses the SeaMAC for Windows API?

Sep 3rd 2016

The SeaMAC Configuration Utility lets you easily configure a Sealevel synchronous serial port to the communication options you select. By using the utility to chan … View More

Manual: 7205ec

May 28th 2016

Downloads: 7205ec-7205ecS User Manual Size: 845.31 KB Type: pdf Article Specifications: Related Models: 7205ec Product Manual for Seale … View More

What is Slew Rate Limiting and when should I use it?

Apr 13th 2016

Slew rate is a measurement of how fast the signal voltage changes over a specified period of time. At high data rates, you need a fast slew rate to ensure that the … View More

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