Pa Link/Coupler Module - Procentec ComBricks User Manual

Profibus data hub for repeaters and fiber optics modules

Table of Contents

12 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 bus parameters are not required and therefore suitable for all DCS and

PLC systems, even running on 12 Mbps.

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 an 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 link or coupler. It is switched off in the monitoring mode.

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.



This module is not suitable for use in Ex environments unless a barrier is used between the PA

module and the Ex zone.

Repeater module status

Received data on PA

Overcurrent, noise,

unbalance, DC-polarity

PA signal too low

or too high

Fig. 78 - Overview of LEDs

Network selection

Link or Coupler mode

Dipswitch or web server settings

Fig. 79 - Overview of dipswitches

Communication errors

or bad telegrams

Repeater internal failure

Jitter, asymmetry,

field device polarity

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