It is favorable when the at least one address connector has {HEAD ~ a communication unit} for communicating with the field bus module via {TAIL ~ the address port} 
It is favorable when the at least one address connector has { HEAD ~ a communication unit } for communicating with the field bus module via { TAIL ~ the address port }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL