EKF - Short Profile
EKF - Short Profile


CompactPCI® Serial • Quad Port Isolated RS-232 Interface

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Block Diagram, Configuration

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CompactPCI® Serial • Quad Port Isolated RS-232 Interface

Proven and reliable, RS-232 stays a popular point-to-point low power communication interface.

The SU2-BALLAD is a peripheral slot card for CompactPCI® Serial systems, equipped with four front panel RS-232 ports. Isolation barrier transceivers are provided for optimum noise and EMC immunity up to 460kbps data rate, as required for industrial use and operation in harsh environments.

The SU2-BALLAD is based on an octal PCI Express® to UART bridge. The 950-style UARTs are compatible with all typical asynchronous serial applications and protocols. While four RS-232 ports are available via Micro-D front panel connectors across isolated transceivers conforming to TIA/EIA-232-E specifications, another four UART channels are wired to the CompactPCI® backplane connector P4, for rear I/O usage by means of a suitable RIO module.



SU2-BALLAD Simplified Block Diagram

Block Diagram
Summary of Features

CompactPCI® Serial
  • PICMG® CompactPCI® Serial standard (CPCI-S.0)
  • Single size Eurocard 3U 4HP 100x160mm2
  • Suitable for CompactPCI® Serial peripheral slot (PCI Express® enabled)
  • CompactPCI® Serial backplane connector P1 for PCI Express®, single lane link
  • Option CompactPCI® Serial backplane connector P4 for rear I/O

  • Diodes® (Pericom®) PCI Express® octal UART PI7C9X7958
  • Eight 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 out-of-band control
  • Dedicated DE (driver enable) and RE# (receiver enable) control
  • Data frame 5, 6, 7, 8 and 9 bits
  • Clock prescaling 4 to 46
  • Windows® WHQL device driver support

RS-232 Transceivers
  • 2.5kV Isolation barrier RS-232 transceivers (Analog Devices isoPower ADM3252E)
  • Transceivers meet EIA/TIA-232-E specifications
  • High data rate up to 460kbps (each board tested @921.6kbps)
  • ±8kV/±15kV ESD protection on Transceiver input/output pins
  • High common-mode transient immunity >25 kV/µs
  • Suitable for high noise data communications and diagnostic ports

Front Panel I/O
  • 4 x Front panel Micro-D 9-pin high density male connectors
  • RS-232 front ports isolated against each other and board circuitry
  • Micro-D cable assemblies available, e.g. Micro-D to classic style D-Sub male or female
  • Ordering option D-Sub 9-pin front panel connectors (4 ports require 8HP F/P)
  • Option 2 x D-SUB9 front panel connectors on request (4HP, 2 x micro ribbon flat cable assembly)
  • Option 3 x D-SUB9 front panel connectors on request (4HP, front handle replaced by screw lock)
  • Option 4 x D-SUB9 front panel connectors on request (8HP, 4 x micro ribbon flat cable assembly)
  • Option additional 4 front panel ports RS-232 or RS-485 by means of mezzanine expansion connectors and SUA-RIO or SUB-RIO configured as mezzanine module (8HP F/P)

Option Rear I/O
  • 4 x Rear I/O UART ports (TTL Level), wired to P4 for optional usage with RIO module
  • Each rear I/O UART port suitable for versatile use with an appropriate transceiver on a RIO module, e.g. RS-232 or RS-232, isolated or non-isolated
  • Standard rear I/O modules available (SUA-RIO for 4 x RS-232 isolated, SUB-RIO for 4 x RS-485 isolated)
  • Option all 8 ports available for rear I/O (SUC-RIO)
  • EKF offers custom specific rear I/O module design

Environment, Regulatory
  • Designed & manufactured in Germany
  • Certified quality management according to ISO 9001
  • Long term availability
  • Rugged solution (coating, sealing, underfilling on request)
  • 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 34.6 years
  • EC Regulations EN55022, EN55035, EN60950-1 (UL60950-1/IEC60950-1)

SU2-BALLAD Micro-D Connector Pin Assignment

Micro-D Connector Pin Assignment
Ordering Information
Please refer to List 21 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