CompactPCI® Quad Isolated RS-485 Interface

Proven and reliable, RS-485 (EIA/TIA-485) stays a popular fieldbus communication interface, due to simple installation via low cost twisted pair copper cables, up to 1200m length.
The CUD-TWIST is a peripheral slot card for CompactPCI® systems, equipped with four isolated front panel RS-485 ports. High speed RS-485 balanced line transceivers with internal 5kV isolation barrier provide for optimum noise and EMC immunity. The CUD-TWIST is equipped with an octal PCI Express® to UART bridge. The 950-style UARTs are compatible with many asynchronous serial applications and protocols. Four isolated EIA/TIA-485 transceivers are wired to RJ45 front panel jacks, individually configurable for full-duplex operation (4+1 wire cable) or half-duplex (2+1 wire cable), either point-to-point or multipoint applications. Another four UART channels are wired to the CompactPCI® backplane connector J2 for rear I/O usage.

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  • PICMG® CompactPCI® Classic (CPCI 2.0) standard
  • Single size Eurocard 3U 4HP 100x160mm2
  • Suitable for CompactPCI® peripheral slot
  • CompactPCI® backplane connector J1 for PCI® 32-bit 33/66MHz support
  • Option CompactPCI® backplane connector J2 for rear I/O (4 x UART TTL level signals)
  • On-board PCI® to PCI Express® bridge
  • Option +5V only power supply

Simplified Block Diagram

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