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ComBricks PROFIBUS PA link/coupler module

ComBricks PROFIBUS PA link/coupler module

The transparent PROFIBUS PA link/coupler enables seamless high speed integration to PROFIBUS PA. It powers the attached PA devices and fully emulates them as DP devices on the backplane. Adjusted busparameters are not required and therefore suitable for all DCS and PLC systems, even running on 12 Mbps.

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ComBricks PROFIBUS PA link/coupler module

The combined internal ProfiTrace and oscilloscope make this product extremely useful for remote maintenance over Ethernet. Jitter, noise, DC current, DC voltage, bar graph and oscilloscope, it is all there and easy to access. The free CommDTM allows access for asset management tools over Ethernet.

ComBricks is able to carry 9 PA links and a RS 485 or Fiber Optic module. It can also be a customized mix of PA modules with other communication modules. The PA link provides 500 mA current on a customizable bus voltage. The integrated PA termination is automatically activated when the module works as a power coupler. It is switched off in the monitoring mode.

ComBricks PROFIBUS PA link/coupler module

It does not require configuration and operates the same way as regular ComBricks repeaters. In the web server the behavior on the PA side can be set, like retries (default 5) and the watchdog (default 3 seconds). This product can directly replace 3rd party Non-Ex PA couplers/links and can be used as a monitor behind existing 3rd party Non-Ex PA couplers.

Technical specifications

PROFIBUS DP (on the backplane)

  • 9.6 .. 12 Mbps
  • Fully transparent
  • No address and adjusted busparameters required


  • 10 .. 27 VDC customizable PA trunk voltage (Non-Ex)
  • 500 mA trunk current
  • 10 mA current consumption (in all modes)
  • 32 devices (depends on current consumption)
  • 31.25 kbps PA signal
  • 1900 m cable length (depends on trunk current)
  • PA termination automatic (ON in coupler mode)

PROFIBUS PA connectors

  • 2 Removable PA screw terminals (1-on-1)
  • 1 Removable power connector (11 .. 28 VDC)
  • < 2.5 mm2 wire diameter (stranded or solid core)

Web server

  • Oscilloscope images of connected devices
  • Last, Min, Max bus signals
  • Bar graph of connected devices
  • DC current of the trunk and signal jitter
  • Email on telegram errors and low bus signals
  • Retry and Watchdog settings


  • 4 Networks selectable with switches
  • Coupler mode: 9 modules (positioned in the first 10 slots)
  • Monitoring mode: 4 modules (positioned in the first 10 slots)
  • 350 mA current consumption


  • Diagnostic LEDs
  • Required Head Station firmware: V1.279 and later
  • Operating temperature: 0..60 °C
  • Dimensions: 140 x 110 x 25 mm
  • Weight: 133 g
UL listed

Want more information? Ask us.

Haydar Al Sawad NLD, ENG, ARA

Haydar Al Sawad

Haydar Al Sawad
T: +31 (0)174 671800


Below you can find all available downloads for this product.

DWG Drawing

Service & Support


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On-site & Online Support

Worldwide PROFIBUS and PROFINET support; on-site and online.

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GSD files

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Software & Firmware downloads

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  • Certified PROFIBUS Engineer

    31 October 2016, 12 December 2016

    'Distinguish yourself from the others and show that you are the expert.....Become a Certified PROFIBUS Engineer.'

  • PROFIBUS Troubleshooting & Maintenance

    16 November 2016

    The PROFIBUS Troubleshooting and Maintenance training course is fully concentrated on those who install and maintain PROFIBUS installations.

  • PROFIBUS Troubleshooting & Maintenance - USA edition

    07 November 2016, 09 November 2016

    The PROFIBUS Troubleshooting and Maintenance training course is fully concentrated on those who install and maintain PROFIBUS installations.

Training overview