![FieldConnex® Segment Coupler 3 for PROFIBUS DP/PA to protect and integrate field device data transparent into the Yokogawa CENTUM ALP 121](/data/general/media/yokogawa/EC_SS_20141223_02_Power_Hub_rendundant_configuration_200x200_rdax_161x161_100.jpg)
The FieldConnex® Segment Coupler 3 for PROFIBUS DP/PA is the right system to protect and integrate field device data transparent into the Yokogawa CENTUM ALP 121 while the PROFIBUS Power Hub is a modular, motherboard-based power supply system for CENTUM ALP 121.
![fieldbus_distribution_honeywell](/data/general/media/yokogawa/fieldbus_distribution_honeywell_rdax_161x161_100.jpg)
Pepperl+Fuchs' FieldConnex FieldBarriers and segment protectors connect instruments to the fieldbus. These fieldbus couplers are mounted in the field near the field device. They offer short-circuit protection and power limiting explosion protection.
![Process interfaces connect multiple intrinsically safe conventional inputs and outputs to the fieldbus](/data/general/media/yokogawa/EC_SS_20170713_01_multi_input_output_fieldbus_rdax_161x161_100.jpg)
FieldConnex process interfaces connect multiple intrinsically safe conventional inputs and outputs to the fieldbus with minimum cabling.
![Accessories for PROFIBUS PA](/data/general/media/yokogawa/EC_NP_Fieldbus_Surge_Terminators_Accessories_200px_rdax_161x161_100.jpg)
Pepperl+Fuchs' FieldConnex offers a variety of accessories for PROFIBUS PA such as surge protectors and sensors for installation in the field and control cabinet.
![Pepperl+Fuchs offers one of the most enhanced Profibus PA physical layer diagnostics](/data/general/media/yokogawa/EC_SS_20191028_Advanced_Diagnostics_200x200px_rdax_161x161_100.jpg)
With the advanced diagnostic module (ADM), Pepperl+Fuchs offers one of the most enhanced PROFIBUS PA physical layer diagnostics. The ADM automates commissioning and documentation, monitors the fieldbus segment online, and identifies faults in real-time.