The Spirax Sarco LC2650 is a level controller designed specifically for conductive liquids, supporting on-off, regulation, and one-to-three element control modes. The device withstands a maximum pressure of 32 bar and temperature of 239 °C, features 2 configurable high/low level alarm channels, and integrates RS485 Modbus RTU communication. The product is suitable for on-off control, continuous regulation, high/low level alarms of boiler levels, and for integrating control information into automated monitoring systems.
LC2650 Product Photo
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Spirax Sarco LC2650 Conductive Liquid Level Controller
Conductive liquid level controller with boiler water level regulation and dual alarm outputs.
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Specifications
- Suitable Medium
- Conductive fluids
- Maximum Operating Pressure and Temperature
- 32 bar at 239 °C
- Minimum Medium Conductivity
- 5 μS/cm or 5 ppm (using LP20 and PA20)
- Control Mode
- On-off control, regulation control, one/two/three-element control
- Alarm Channels
- 2, can be individually set as high alarm or low alarm
- Supply Voltage
- 110-240 VAC, 50/60 Hz
- Maximum Power Consumption
- 7.5 W
- Level Input Signal
- 0-6 Vdc or 0-20 mA
- Input Accuracy
- 5% FSD operating range
- Analog Output
- Isolated 0-20 mA or 4-20 mA, maximum load 500 Ω, isolation 100 V
- Relay Output
- 2 × single-pole changeover relays (SPCO), maximum 250 Vac; resistive load 3 A at 250 Vac
- RS485 Communication
- 4-wire full-duplex or 2-wire half-duplex, Modbus RTU, maximum communication distance 1200 m
- Infrared Communication
- IrDA, 38400 baud, communication distance 10 cm, operating angle 15°
- Mounting Method
- Panel mounting, DIN rail mounting, or baseplate mounting
- Ambient Temperature Range
- 0-55 °C, indoor use only
- Protection Rating
- Front panel IP65; installation enclosure minimum IP54
- Safety Certifications
- Vd TÜV Water Control Equipment 100 (07:2006); UL Listed; EN 61010-1
- Electromagnetic Compatibility
- Complies with 2017/30/EU, suitable for heavy industrial environments
Application scenarios
Boiler Water Level On-Off Control with High/Low Level Alarms
Used for on-off control of conductive liquid levels in boilers, with two alarm channels that can be individually set for high or low level alarms.
Boiler Level Regulation Control
Used for regulation control of conductive liquid levels in boilers, supporting one-, two-, or three-element control modes.
RS485 Modbus Communication Monitoring for Level Control Systems
Used to integrate level control information for boilers, tanks, or vessels into compatible monitoring or automation systems via RS485 Modbus RTU communication, and to display level status, alarms, and trend information on site.
FAQ
What level control applications is the LC2650 suitable for?
The LC2650 is used for level control of conductive fluids, suitable for boilers, tanks, and vessels. It can achieve on-off or regulation level control, and can execute control via pumps, valves, or solenoid valves.
What are the requirements for medium conductivity and operating conditions for the LC2650?
When using LP20 and PA20, the minimum conductivity of the suitable medium is 5 μS/cm or 5 ppm; the operating limit is 32 bar at 239 °C. Specific configuration must be confirmed based on the actual model and application conditions.
What control modes does the LC2650 support?
The LC2650 supports on/off control, regulation control, and two- or three-element regulation control. On/off control can be used for pump or solenoid valve start/stop; regulation control can use valve motor drive or 4-20 mA control signals; two- or three-element control can accept steam flow feedback and feedwater flow feedforward signals.
What alarm, display, and communication functions does the LC2650 have?
The product has two alarm channels that can be individually set as high or low level alarms, and provides alarm relay outputs. The front LCD can display operating status, PV percentage, alarms, and level trend graphs; it supports infrared communication and RS485/Modbus communication.
What should be noted during installation and maintenance of the LC2650?
The product can be panel, DIN rail, or baseplate mounted, and should be installed in a suitable industrial control panel or fireproof enclosure with a minimum enclosure protection rating of IP54 or corresponding NEMA type. Before installation and wiring, ensure there is no condensation inside the product, and do not open the device. The product generally requires no special maintenance, but boiler water level control and alarm functions should be tested and inspected as required.