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Table of contents
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 08/2014, A5E32221386-AC
7
12.26
Raised-Face flange per EN 1092-1 for flanged horn antenna ................................................... 219
12.27
Raised-Face flange per EN 1092-1 for flanged encapsulated antenna..................................... 221
12.28
Flat-Face flange ......................................................................................................................... 224
12.29
Aseptic/hygienic flange DN50, DN80, DN100 for DIN 11864-2 ................................................. 227
12.30
Process connection tag (pressure rated versions) .................................................................... 230
A
Appendix A: Technical reference ......................................................................................................... 231
A.1
Principles of operation ............................................................................................................... 231
A.2
Echo processing......................................................................................................................... 232
A.2.1
Process Intelligence ................................................................................................................... 232
A.2.2
Echo Selection ........................................................................................................................... 232
A.2.3
A.2.4
Echo Threshold .......................................................................................................................... 236
A.2.5
Echo Lock .................................................................................................................................. 236
A.2.6
Auto False Echo Suppression .................................................................................................... 236
A.2.7
Measurement Range ................................................................................................................. 238
A.2.8
Measurement Response ............................................................................................................ 239
A.2.9
Damping ..................................................................................................................................... 239
A.2.10 Loss of Echo (LOE) .................................................................................................................... 240
A.2.10.1 LOE Timer .................................................................................................................................. 240
A.2.10.2 Fail-safe Behavior ...................................................................................................................... 240
A.3
Maximum Process Temperature Chart ...................................................................................... 242
A.4
Process Pressure/Temperature Derating Curves ...................................................................... 243
A.4.1
Pressure Equipment Directive, PED, 97/23/EC ......................................................................... 244
A.4.2
A.4.3
Flanged horn antenna ................................................................................................................ 245
A.4.4
Flanged encapsulated antenna .................................................................................................. 250
A.4.5
A.4.6
Hygienic encapsulated antenna ................................................................................................. 253
B
Appendix B: PROFIBUS PA profile structure ....................................................................................... 257
B.1
PROFIBUS Level Device Design ............................................................................................... 257
B.2
Block Model ................................................................................................................................ 257
B.2.1
Description of the blocks ............................................................................................................ 258
B.2.1.1 Transducer Block function groups ............................................................................................. 258
B.2.1.2 How the transducer block works: ............................................................................................... 259
B.2.1.3 Analog Input Function Blocks 1 and 2 ....................................................................................... 261
C
Appendix C: Communications via PROFIBUS ..................................................................................... 265
C.1
Device configuration .................................................................................................................. 265
C.1.1
C.1.1.1 Electronic Device Description .................................................................................................... 265
C.2
Network configuration ................................................................................................................ 265