Linking {TAIL ~ device} in a process control system that allows {HEAD ~ the formation} of a control loop having function blocks in a controller and in field devices 
Linking { TAIL ~ device } in a process control system that allows { HEAD ~ the formation } of a control loop having function blocks in a controller and in field devices
OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH