SITRANS LT500 Ultrasonic version

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SITRANS LT500 is a versatile level controller for single or multi-point applications. It supports ultrasonic and 4–20 mA input sensors, offering advanced control capabilities for liquids, bulk solids, open channels, reservoirs, and complex level systems.

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Key Features

  • User-friendly HMI display with 4-button programming, intuitive menu interface, and application-specific setup Wizards

  • Multilingual support: English, German, French, Spanish, Chinese, Italian, Portuguese, Japanese, Danish, Dutch, Swedish, Finnish, Polish, Russian, Korean

  • Removable terminal block for easy wiring and maintenance

  • Digital input supports override control from point level devices

  • Supports digital communication protocols: HART, Modbus RTU, PROFIBUS PA/DP, PROFINET

  • Monitors single or dual level in one device

  • Auto False-Echo Suppression automatically filters out fixed obstructions

  • Supports up to 6 independent relays for pump control, alarms, or remote flow totalization

  • Measures level, volume, open channel flow, advanced pump control, differential level, and overfill protection

  • Flexible mounting options: wall, panel, or remote display

  • Remote configuration via SIMATIC PDM or SITRANS DTM over USB

  • MCERTS-certified for open channel flow measurement

Typical Applications

  • Monitoring and control in tanks, wells, and wastewater sumps

  • Flow measurement in open channels, flumes, and weirs

  • Pump control for energy-efficient operations and scheduled runtime management

  • Level measurement in chemical storage, liquids, solids, crusher sumps, and silos

Sensor Compatibility

  • SITRANS LT500 mA HART is compatible with sensors like SITRANS LR110, LR120, Probe LU240, or any 4–20 mA signal device

  • Ultrasonic version is compatible with EchoMax sensors or legacy ultrasonic probes

Flexible Design

  • Available in wall-mount, panel-mount, or remote display configurations

  • Fast setup and scalable for extended communication and control capabilities

Category Specification
Mode of Operation
Measuring principle Level, space, distance, volume, flow, head, difference, average, totalization
Sensor input, ultrasonic version
Number of inputs 1 or 2
Measuring range 0.3 … 60 m (1 … 196 ft), transducer dependent
Transducer frequency 10 … 52 kHz
Ultrasonic transducer Compatible transducers: all EchoMax and ST-H series transducers, legacy coaxial cable connections via converter
Accuracy
• Error in measurement • Standard operation: ±1 mm (0.04 inch) plus 0.17 % of measured distance
• High accuracy OCM: ±1 mm within 3 m (9.84 ft) range
• Resolution • Standard operation: 0.1 % of range or 2 mm (0.08 inch), whichever is greater
• High accuracy OCM: 0.6 mm (0.02 inch) within 3 m (9.84 ft) range
Temperature Compensation
• -40 … +150 °C (-40 … +300 °F)
• Integral temperature sensor in transducer
• External TS-3 temperature sensor (optional)
• Programmable fixed values
Wiring & Max. cable length Transducer: 2 copper conductors, twisted, with foil shield/drain wire, 300 V
0.5 … 0.75 mm² (22 … 18 AWG)
365 m (1 200 ft)
Digital Input
Quantity 2
Switching threshold, low 0 … 0.5 V DC
Switching threshold, high 10 … 50 V DC
Input current Max. 3 mA
Bias voltage 24 V
Analog Output
Quantity 1 or 2
Range 0 … 20 mA or 4 … 20 mA isolated
Max. load 750 W
Resolution 0.1 % of range
Accuracy ±20 μA
Startup current 3.6 mA
Fail-safe Programmable as high, low, last reliable, set value, or hold per NAMUR NE43
Relay Output
Quantity Up to 6, 4 form A and 2 form C
Rating 5 A at 250 V AC, 5 A at 30 V DC, non-inductive
Durability 50,000 operations min. per relay (5 A at 30 V DC, resistive load)
Fail-safe Programmable as energized, de-energized, or hold
Wiring Copper conductors per local requirements to meet 250 V 5 A contact rating
Rated Operating Conditions
Installation conditions
• Location Indoor/outdoor
• Installation category II
• Pollution degree 4
Ambient conditions
• Ambient temperature -20 … +50 °C (–4 … +122 °F)
• Storage temperature -20 … +50 °C (–4 … +122 °F)
• Altitude 2,000 m (6,565 ft) maximum
• Vibration resistance 0.5 g at frequencies from 10 Hz to 100 Hz
• Bump/shock resistance 25 g
Design
Wall mount 1.22 kg (2.68 lb)
Panel mount 1.35 kg (2.97 lb)
Remote panel mount 1.73 kg (3.80 lb)
Enclosure material Polycarbonate
Degree of protection
• Wall mount IP65/Type 4X
• Panel mount IP54/Type 3
• Remote panel mount IP65/Type 3 (front panel), IP20 (enclosure)
Display and Control
LCD display 60 × 40 mm (2.36 × 1.57 inch) LCD, 240 × 160 pixels resolution
Menu navigation 4 push button keys
Update time 1 second or less
Memory Program and parameters stored in non-volatile flash memory
Real-time clock memory retention 48 hours
CPU speed 96 MHz
Memory card 8 GB industrial micro SD
Power Supply
AC version 100 … 230 V AC, ±15 %, 50/60 Hz, 36 VA (17 W)
DC version 12 … 30 V DC (20 W)
Certificates and Approvals • CE, UKCA, RCM, EAC, FM, CCSAUS, CULUS
• CCSAUS Class I, Div. 2, Groups A, B, C, D; Class II, Div. 2, Groups F & G; Class III
• Mcerts
Communication
Service interface USB 2.0 mini A cable
Optional fieldbus • HART 7, with Active/Passive 4 … 20 mA
• Modbus RTU
• PROFIBUS PA per profile 4.01
• PROFIBUS DP
• PROFINET
Remote configuration • EDD via SIMATIC PDM
• SITRANS DTM via PACTware

 

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