EKF - Short Profile
EKF - Short Profile


CompactPCI® • Triple Isolated RS-485 Interface

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Ordered List
Product Information
Block Diagram
RS-485 Configuration

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CompactPCI® Classic  •  Triple Isolated RS-485 Interface

The CU3-TRIO is a peripheral slot card for CompactPCI® systems, equipped with a PCI Express® to UART bridge. Three high speed RS-485 balanced line transceivers with internal 5kV isolation barrier provide for optimum noise and EMC immunity. The front bezel D-Sub connectors withstand up to 250VAC measured against shield.

The 950-style UARTs (aka COM ports) are compatible with any asynchronous serial application. Device drivers are available for Windows® and Linux. The 16Mbps EIA/TIA-485 transceivers can be configured for full-duplex operation (4+1 wire cable) or half-duplex (2+1 wire cable), either point-to-point or multipoint applications.

CU3-TRIO - Photo Soon Here
Summary of Features

  • PICMG® CompactPCI® Classic (CPCI 2.0) peripheral slot card
  • Single size Eurocard 3U 4HP 100x160mm2
  • CompactPCI® backplane connector J1 for PCI® 32-bit 33/66MHz support
  • On-board PCI® to PCI Express® bridge
  • Option +5V only power supply

  • Pericom® PCI Express® quad UART PI7C9X7954
  • High performance 950-class UARTs
  • 16C550 software compatible
  • 128-Byte FIFO for each transmitter/receiver
  • Baud rate up to 15Mbps
  • XON/XOFF in-band flow control
  • CTS/RTS or DSR/DTR out-of-band control
  • Data frame 5, 6, 7, 8 and 9 bits
  • Clock prescaling 4 to 46
  • Windows® & Linux device driver support

RS-485 Transceivers
  • 5kV rms isolation barrier RS-485/RS-422 transceivers (Analog Devices)
  • Configurable as half- or full-duplex
  • ±15 kV ESD protection on RS-485 input/output pins
  • Data rate 16 Mbps
  • Connect up to 256 nodes on one bus (driver enable control via DTR)
  • Open- and short-circuit, fail-safe receiver inputs
  • High common-mode transient immunity >25 kV/µs
  • Thermal shutdown protection
  • Three front panel male 9-pin D-Sub connectors
  • RS-485 ports isolated against each other and board circuitry 250VAC
  • On-board DIP-switches for full/half-duplex setting, and line termination on/off

Environment, Regulatory
  • Designed & manufactured in Germany
  • Commercial and industrial temperature range
  • Certified quality management according to ISO 9001
  • Rugged solution (coating/sealing available on request)
  • Long term availability
  • RoHS compliant
  • Operation temperature -40°C to +85°C (industrial temperature range)
  • Storage temperature -40°C to +85°C, max. gradient 5°C/min
  • Humidity 5% ... 95% RH non condensing
  • Altitude -300m ... +3000m
  • Shock 15g 0.33ms, 6g 6ms
  • Vibration 1g 5-2000Hz
  • MTBF tbd years
  • EC Regulations EN55022, EN55024, EN60950-1 (UL60950-1/IEC60950-1)

CU3-TRIO Simplified Block Diagram

CU3-TRIO Simplified Block Diagram
Ordering Information
Please refer to List 20 for popular SKU
EKF is an ISO-9001 certified company
EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 Hamm • Germany
Phone +49 (0)2381/6890-0 • Fax +49 (0)2381/6890-90 • E-Mail