US 11,943,009 B2
Communication barrier arrangement and method for its operation
Ulf Hansson, Västerås (SE); Thomas Keul, Freigericht (DE); and Johan Wennerberg, Västerås (SE)
Filed by ABB Schweiz AG, Baden (CH)
Filed on Jul. 1, 2022, as Appl. No. 17/810,381.
Claims priority of application No. 21184395 (EP), filed on Jul. 8, 2021.
Prior Publication US 2023/0010364 A1, Jan. 12, 2023
Int. Cl. H04B 5/00 (2006.01)
CPC H04B 5/005 (2013.01) 15 Claims
OG exemplary drawing
 
1. A communication barrier arrangement for connection between a first and a second process control system device, the communication barrier arrangement comprising:
a first driving stage having a first interface for receiving first signals from the first process control system device that are destined for the second process control system device;
an isolation barrier comprising a first transformer having a primary winding connected to the first driving stage and a secondary winding, where the first transformer is provided for transfer of the first signals;
a second driving stage connected to the secondary winding of the first transformer and having a first connection terminal for output of the first signals towards the second process control system device;
a first signal conditioner having a second connection terminal for receiving the first signals from the second driving stage and a second interface for delivering the first signals to the second process control system device; and
a protection circuit including a resistor in parallel with a first capacitor, said protection circuit being connected between the first and second connection terminals.