User's Manual

7ML19985FH04 SITRANS LR 400 – INSTRUCTION MANUAL Page 5
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General Information
System Implementation
SITRANS LR 400 supports HART communication protocol, and SIMATIC PDM software.
Typical PLC/mA configuration with HART
Typical PLC/mA configuration with PROFIBUS PA
Note: A 250 ohm loop resistor may be required, depending on PLC input resistance.
SI TR A N S L R 400
PLC with mA
input card
HART
HART Communicator 275
SITRANS LR 400
PC/laptop with HART
modem running PDM
SITR AN S LR 40 0 SIT R AN S L R 40 0 SIT R AN S L R 40 0
PDM
Class 2
Master
Class 1
Master
PLC
DP/PA
Coupler
ET200
HART
PROFIBUS PA
SITRANS LR 400
SITRANS LR 400
SITRANS LR 400