Connecting Hart - Siemens SITRANS LUT400 Operating Instructions Manual

Connecting HART

Typical PLC/mA configuration with Passive HART connection
power supply
SITRANS LUT400
ITR NS UT400
Typical PLC/mA configuration with Active HART connection
SITRANS LUT400
ITR NS UT400
mA Output (HART)
For ACTIVE HART
connection (using
LUT400 integral power
supply), connect
terminals 22 and 23.
For more information, consult the mA output parameters (2.5. Current Output) in the
parameter reference section.
1. Depending on the system design, the power supply may be separate from the PLC, or integral to
it.
2. The nominal value for the HART resistor is 250 Ohm. For more information see application guide
Working with HART
www.siemens.com/sitransLUT400 under Support and click on Application Guides.
Page 26 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
R = 250 Ω
mA OUT/HART
22 23
ACT
, which can be downloaded from the product page of our website. Go to:
1
PLC
2
R = 250 Ω
HART modem
HART
communicator
1
PLC
2
HART modem
HART
communicator
For PASSIVE HART
connection (using
external power
24
supply), connect
terminals 23 and 24.
PAS
A5E33329501