Level System Synchronization - Siemens SITRANS L 7ML5400 Operating Instructions Manual

Connecting
5.1 Connecting SITRANS LUT400
mA Output (HART)
For ACTIVE HART connection (using LUT400 integral power supply), connect terminals 22 and
23.
For PASSIVE HART connection (using external power supply), connect terminals 23 and 24.
For more information, consult the mA output parameters (2.5. Current Output) in the
parameter reference section.
Depending on the system design, the power supply may be separate from the PLC, or
1)
integral to it.
The nominal value for the HART resistor is 250 Ohm. For more information see application
2)
guide Working with HART, which can be downloaded from the product page of our website.
Go to: www.siemens.com/sitransLUT400 (www.siemens.com/sitransLUT400) under Support
and click on Application Guides.
5.1.8

Level system synchronization

Note
The SITRANS LUT400 CANNOT be synchronized with the MultiRanger Plus, the original
HydroRanger, or the OCMIII.
When transducer cables are run parallel with each other, synchronize the level monitors so
that no device transmits while another is waiting for echo reception. If more than one
ultrasonic device is being installed in the same application, the devices must be synchronized
to prevent cross-talk. Optionally, the transducer cables can be run in separate grounded
metal conduits.
Other Siemens Transceiver
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Operating Instructions, 04/2021, A5E33329501-AG
SITRANS LUT400