RocketPort ® EXPRESS Octacable DB25M

PCI Express 8-Port serial card with DB25M fanout cable
The RocketPort EXPRESS Octacable DB25M is an eight port serial adapter delivering fast speeds and reliable performance. The PCIe serial card comes with a DB25M fanout cable

Part Number: 30129-5

  • PCI Express serial x1, x2, x4, x8, x12 and x16 lane connectivity
  • Low-profile or standard height compatible
  • RS-232, RS-422, RS-485 software-selectable serial ports
  • High performance serial port expansion cards with communication speeds up to 921 Kbps
  • Support for the most popular Windows operating systems (including Windows® 10) and Linux kernels
  • Windows driver, which can be configured for interrupt or polling mode
  • Free troubleshooting tools in the event you want to diagnose an issue:
    • Hardware diagnostics
    • LCOM (Linux tool for testing serial ports)
    • Comtrol Utility, which includes Test Terminal (WCOM2) for serial port testing and Port Monitor for monitoring ports

The RocketPort EXPRESS Octa DB25M is an eight port serial adapter that is compatible with systems that have x1, x2, x4, x8, x12 or x16 PCI Express expansion slots. The card is designed for standard and low-profile PCs and servers and ships with a low-profile and a standard-height bracket. The product provides support for software-selectable RS-232/422/485 serial communications and data transmission speeds up to 921 Kbps. Serial connections are made utilizing an external fan-out octacable with eight DB25M connectors that is included with the product. All RocketPort EXPRESS products are European RoHS directive compliant.

View Engineering Drawing

  • RocketPort Express Octa DB25 Device
  • DB25M Octa Cable 42"
  • Loopback Plug
  • Bracket (1)
  • Maximum Cards/System 4
  • Bus Interface Specification PCI Express (PCIe) x1, x2, x4, x8, x12, x16-Lane Compatible
  • Board Dimensions 4.7" x 2.6" (Low-profile)
    119.4 x 66 mm
  • Product Weight 9.4 oz
    266.49 kg
Electrical Specifications
  • Current Consumption
    • +3.3VDC 910 mA
  • Power Consumption (maximum) 3.1 W
  • ESD Surge Protection Provides minimum of 15KV for a duration of 1ns @ 200A.
Environmental Specifications
  • Air temperature
    • System On 0 to 60° C
    • System Off -20 to 85° C
  • Operating Humidity (non-condensing) 5% to 95%
  • Altitude 0 to 10,000 Feet
    3,048 m
  • Heat Output 10.6 BTU/Hr
  • MTBF (Mean Time Between Failures) 48.7 Years

Serial Communications

  • Software Selectable RS-232, RS-422, or RS-485
  • Baud Rate 300 bps to 921.6 kbps
    • Receive Buffer 512 bytes
    • Transmit Buffer 512 bytes
  • Device Driver Data Control
    • Data Bits 5, 6, 7, or 8
    • Parity odd, even, none, mark or space
    • Stop Bits 1, 1.5, or 2
    • Flow Control HARDWARE or SOFTWARE
    • Ring Indicator YES


  • Manufacturer's Warranty 5 Years
Export Information
  • Packaged Shipping Weight 2.26 lbs
    1.03 kg
  • Package Dimensions 9.25" x 2.5" x 7.25"
    235 x 63.5 x 184.2 mm
  • UPC Code 7-56727-30129-5
  • Country of Origin USA
  • ECCN EAR99
  • Schedule B Number 8471.80.1000

Device Drivers

  • Linux
  • Microsoft® Windows® 7
  • Microsoft® Windows® 2008 Server
  • Microsoft® Windows® Vista
  • Microsoft® Windows Server® 2003
  • Microsoft® Windows® XP
  • Microsoft® Windows NT® 4.0 (Legacy)
  • Microsoft® Windows® 2000 (Legacy)
  • FreeBSD® 5
  • FreeBSD® 6
  • QNX® 6.X
Regulatory Approvals
  • Emissions Canadian EMC requirements
    European Standard EN55022
    FCC Part 15 Subpart B
    Class B limit
  • Immunity European Standard EN55024
    IEC 1000-4-2/EN61000-4-2: ESD
    IEC 1000-4-3/EN61000-4-3: RF
    IEC 1000-4-4/EN61000-4-4: Fast Transient
    IEC 1000-4-5/EN61000-4-5: Surge
    IEC 1000-4-6/EN61000-4-6: Conducted Disturbance
    IEC 1000-4-8/EN61000-4-8: Magnetic Field
    IEC 1000-4-11/EN61000-4-11: Dips and Voltage Variations
  • Safety IEC 60950/EN60950
    CSA C22.2 No. 60950/UL60950 Third Edition
  • Other Regulatory Approvals

  • Pinout Diagram

    DB25M Pinout

Find a Distributor

» Industrial Distributors
» North American Distributors
» International Distributors

Pre-Sales Questions

Comtrol's Pre-sales Team
For sales questions or to locate a reseller near you.

+1-800-926-6876 (1-800-Go Rocket)
Fax: +1-763-957-6001

Comtrol's Industrial Automation Sales
For sales questions or to locate an industrial distributor near you.

+1-800-926-6876 (1-800-Go Rocket)
Fax: +1-763-957-6001

DocumentDescriptionDownload File
RocketPort ® EXPRESS Octacable DB25M User GuideContains detailed installation procedures and configuration information.
Product Support and Service Information

Part Number: 30129-5

Sales Support

Call +1.763.957.6000, or e-mail

Technical Support

For technical assistance, our U.S.-based technical support team is only a phone call away.

Call +1.763.957.6000, or visit our forum .


Comtrol offers a 30-Day satisfaction guarantee and a 5-year limited warranty on all RocketPort EXPRESS family products!

View Warranty

Extended Warranty Available

Software & Drivers
» Comtrol FTP Site