7205ec - 2 Port RS-232/422/485 Low Profile PCI Express Asynchronous Serial Card (COMM+2.PCIe)

Lifetime Warranty

This product has a lifetime warranty against product failure (excludes user or enviromental damage).


This product fully adheres to the Restriction of Hazardous Substances Directive 2002/95/EC, RoHS for short.  The directive covers the restriction of use of certain hazardous substances in electrical and electronic equipment and was adopted in February 2003 by the European Union.


CE is a mandatory standard for products on the market in the European Economic Area. By CE marking a product, the manufacturer ensures that the item meets the essential safety requirements set out in the applicable CE directive.

FCC Approved

The Federal Communications Commission (FCC) is an independent agency of the United States government that sets standards and governs the testing of conducted and radiated emissions such as EMI.

7205ec serial PCI express card
7205ecS connector7205ec back7205ecS7205ec7205ec top

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7205ec with low profile height bracket


7205ec with standard height bracket

* Lead time is indicative and is subject to change at time of ordering. Next business day delivery on in-stock products only (when ordered before 3pm).
** Contact us for quantity or project pricing.
† Additional delivery charge may be incurred for certain postcodes (calculated at checkout)
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7205ec overview

  • Each serial port configurable for RS-232, RS-422 or RS-485
  • Electrical interface selection via on-board DIP switch with Windows device driver override
  • Windows driver features software-selectable 250K slew rate limiting to minimise electromagnetic interference
  • Ultra high-speed UART with 256-byte Tx and Rx FIFOs
  • Supports asynchronous data rates exceeding 1Mbps
  • Bus-derived 125MHz BRG and clock prescalar support wide range of baud rates
  • All modem control signals implemented in RS-232 mode
  • Automatic RS-485 enable/disable for Windows applications
  • PCI Express [x1] compliant
  • Compatible with low profile PCI Express slots (optional standard profile slot with 7205ecS-ROHS version)
  • Included 36" cable terminates to two DB-9M connectors
The 7205ec low-profile PCI Express serial interface provides two serial ports configurable for RS-232, RS-422 or RS-485. Each serial port features an ultra high-speed UART, flexible clock prescalar, and large 256-byte Tx/Rx FIFOs allowing the adapter to support the widest range of standard and non-standard baud rates exceeding 1 Mbps. These features make the 7205ec ideal for data intensive applications that require reliable, ultra-fast throughput rates.

The electrical interface, echo suppression and line termination are set via convenient on-board DIP switches, which can be overridden by the Windows device driver. Additionally, the Windows driver provides a software-selectable Slew Rate Limiting feature to minimise electromagnetic interference where high baud rates are not required. For rapid troubleshooting, on-board LEDs display the board heartbeat, electrical interface selection and line termination state.

In RS-485 mode, the transmitter is automatically enabled in hardware for Windows applications, eliminating the need for software control. This allows the 7205ec to be used with standard serial communications applications and removes the risk of bus contention and data corruption. In RS-232 mode, all modem control signals are implemented for maximum compatibility with a wide range of serial peripherals.

The Sealevel SeaCOM software driver and utilities make installation and operation easy using Microsoft Windows or Linux operating systems.

The 7205ec is a PCI Express [x1] board compatible with any low profile PCI Express slot. If you have a standard size PCI Express slot, please request the 7205ecS-ROHS version. The 7205ec is RoHS compliant and meets the requirements of RoHS (2011/65/EU) directive.

The board ships with a 36" cable that terminates to two DB9M connectors.

For more information about the 7205ec please contact our technical sales team on +44(0)1782 337 800 or alternatively submit an enquiry.
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T: +44 (0)1782 337 800 • E: sales@impulse-embedded.co.uk
+44(0)1782 337 800
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Oct 2021
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