ABIM-422A-1 RS-232, RS-422 or RS-485 Serial Bus Parser/Packetizer - 16ch

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Key Features

  • Monitors up to 16 RS-422/485/232 busses
  • Coherently parses traffic and tags for up to 1,024 messages from 4 to 1,024 bytes
  • Aperiodic transmission of packetized serial messages including tags as iNET-X parser-aligned payload structure and Chapter 10 UART Data Packets
  • Bit-rates from 300 bps to 10,000,000 bps
  • 7/8 bits per word with odd, even or no parity
  • Programmable start sequence (1 to 8 bytes), stop sequence (1 byte or by fixed length) and idle time

Applications

  • Interfacing with serial data links
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The ABIM-422A is used to monitor up to 16 RS-232/422/485 channels. The module can parse (coherently extract specific bytes) and/or packetize (insert messages in packets for Ethernet transmission) each channel at the same time.

The signal type (RS-232/422/485), bits per word, and parity are programmable on a channel-by-channel basis.

In the parser, a total of up to 1,024 complete messages are triple buffered so that the stale indication is message-wide. Each message can be up to 1,024 characters (bytes) long (including start and stop characters). Each message is time tagged; a message is considered found when a start sequence of up to eight specific bytes is received. The end-of-message delimiter is determined by a user-defined stop character or after a specific number of words are received. A message is not updated if any sequence is incorrect.

Independently of the parser, a packet stream is generated for each channel. All received bytes are encapsulated in an Ethernet frame. A programmable gap time allows the module to split the incoming bytes into shorter timestamped sequences. A block header attached to each sequence stores the channel index, length, and the time of reception of each message. These Ethernet frames may be transmitted aperiodically to optimize network bandwidth utilization and memory usage when recording serial traffic. Optionally, the message stream can be filtered such that only certain messages are captured and packetized.

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