What products are being designated EOL?
PCI Synchronous Serial Adapters: 5102, 5103, 5104
PCI Asynchronous Serial Adapters: 7102, 7106, 7201, 7203, 7204, 7205, 7404,
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Resource Center
Ethernet to Serial Alternatives
Apr 9th 2025
While Ethernet to serial products have played a critical role in serial to network applications, these products are approaching obsolescence, driving the need to find
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This is intended for RHEL 8 and RHEL 9 users impacted by the issue described in this support article: https://www.sealevel.com/support/how-to-resolve-communication-is
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What is EtherNet/IP?
Jun 1st 2024
EtherNet/IP is open-source and is managed and developed by the Open DeviceNet Vendors Association (ODVA), a tax-exempt business league that includes a wide variety of
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What is Modbus?
Jun 1st 2024
Modbus, initially developed in 1979, is one of the oldest, most widely used industrial communications protocols. Traditionally, Modbus was/is implemented using RS-232
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SeaMAC: ssiEncodingNone vs ssiEncodingNrz
Mar 25th 2024
Aren’t the ssiEncodingNone and ssiEncodingNrz clock encoding methods in SeaMAC the same? They are very similar, but the difference is that “None” t
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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 through dip
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Manual: 7202c
Dec 22nd 2023
Downloads:
7202c User Manual
Size: 1.15 MB Type: pdf
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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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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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Manual: 3102
Sep 6th 2022
Downloads:
3102 User Manual
Size: 281.81 KB Type: pdf
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Manual: 3101
Sep 6th 2022
Downloads:
3101 User Manua
Size: 266.64 KB Type: pdf
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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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