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