5136-PFB-VME SST WOODHEAD INTERFACE CARD

The SST-PFB3-VME-x is the next-generation PROFIBUS VME card. Wherever possible, backward compatibility has been maintained with the 5136-PFB-VME. However, the new SST-PFB3-VME-x is not a drop-in replacement for the existing 5136-PFB-VME card. The main difference between the two cards is the Short I/O register layout and serial port operation.

Features:

• Supports All Standard Profibus Baud Rates: 9.6 Kbaud to 12 Mbaud
• Simultaneous Operation of Profibus DP Master, DP Slave, FDL (layer 2), and FMS Client
• Intel 32-Bit i960 RISC Processor Utilized with 512 KB of 32-Bit Local RAM
• 512 KB of Flash Memory for Storage of Programs and Configuration

The SST 5136-PFB-VME Profibus Interface Card can act as a DP slave, act as a DP master, and send and receive FDL (layer 2) messages. The card supports simultaneous operation in all these modes. The card supports the standard ProfiBus baud rates of 9.6K, 19.2K, 93.75K, 187.5K, 500K, 750K, 1.5M, 3M, 6M and 12M baud. The card has an onboard Intel i960 processor with 512 Kbytes of local RAM, that handles the communication protocol and data formatting into the shared RAM.

The card has an additional 256 Kbytes of RAM which is shared with the host as either a single block of 256 Kbytes (linear addressing mode) or as one of sixteen, 16 Kbyte pages (paged mode). In paged mode, the host determines which page of this shared RAM is mapped into the host memory by writing to a register on the card. This block of memory contains all the tables and buffers that are used to pass information between the interface card and the application software running in the host computer. 

This approach ensures a fast and simple connection between the host computer and the card software. In addition, the card has 512 Kbytes of sectored flash memory, for storage of programs and configuration data. ProfiBus configuration information may also be stored in flash.

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