Key facts
- Brand
- Siemens
- Model
- LR400
- Documents
- 4
- Languages
- ZH · EN
- Last added
- 2011-12-19
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Siemens SITRANS LR 400 Level Transmitter User Manual
The SITRANS LR 400 is a frequency‑modulated continuous‑wave radar level transmitter. This manual provides safety information, installation steps, wiring details and operating instructions for both HART and PROFIBUS PA communication.
Technical data such as power requirements, measurement range, output signal and environmental ratings are listed, along with troubleshooting guidance and maintenance procedures. This manual is written in Chinese.
Siemens LR400 specifications
| Extended temperature range | -40°C to 149°C |
|---|---|
| Power supply (AC) | 120–230 Vac, ±15 %, 6 W (12 VA) |
| Power supply (DC) | 24 Vdc, +25 %/‑20 %, 6 W |
| Maximum measurement distance | 45 m (147 ft) |
| Maximum torque | 0.5–0.6 Nm |
All Siemens LR400 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What communication protocols does the SITRANS LR400 support?
It supports HART and PROFIBUS‑PA communication.
What is the maximum measurement distance of the sensor?
The sensor can measure up to 45 m (147 ft).
What safety requirements must be followed when installing the SITRANS LR 400?
Installation and operation must be performed by qualified personnel following the safety warnings and local regulations to prevent injury or damage.
What power options are available for the SITRANS LR 400?
The device can be powered from 120‑230 V AC (50/60 Hz) or from 24 V DC, each consuming about 6 W.
What power supply options are available for the instrument?
The device can be powered from 120‑230 V AC (15 % tolerance) or from a 24 V DC source with +25/‑20 % tolerance.
From: Siemens SITRANS LR 400 Radar Level Meter Instruction Manual
Which communication protocols does the SITRANS LR 400 support?
It supports HART communication and PROFIBUS PA, and can be used with SIMATIC PDM software.
From: Siemens SITRANS LR 400 Radar Level Meter Instruction Manual