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SITRANS FU E950

Thermal Energy Calculator
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Product Describe:

Siemens SITRANS FU E950 combines a flowmeter pulse signal with hot- and cold-line temperatures to calculate thermal energy. The modular calculator supports configured heating, cooling or combined heating/cooling applications with water.

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Technical specifications for SITRANS FU E950

  • Manufacturer:
    Siemens
  • Product Category:
    General Automation
  • Spare Part Number:
    SITRANS FUE950
  • Estimated shipping dimensions:
    5.47×15.0×9.9 cm
  • Weight:
    0.45 kg
  • Tariff Code:
    8537101190
  • Counliy of origin:
    Germany
  • Manufacturer family designation:
    SITRANS FUE950
  • Measuring function:
    Thermal energy calculation
  • Standard measuring medium:
    Water
  • Application configurations:
    Heating, cooling or combined heating/cooling; order dependent
  • Energy calculation:
    Volume x (hot temperature - cold temperature) x thermal coefficient
  • Typical measuring accuracy:
    +/- (0.5 + 3 K / temperature difference) % of measured value
  • Measured temperature range:
    -20 to +190 C
  • Approved heating range:
    0-180 C; requires corresponding approved configuration
  • Approved cooling range:
    0-105 C; requires corresponding approved configuration
  • Heating differential range:
    3-177 K; starts at 0.1 K
  • Cooling differential range:
    3-102 K
  • Temperature measurement cut-off:
    0.125 K
  • Temperature display resolution:
    0.1 K for hot, cold and difference values
  • Temperature conversion:
    16-bit digital resolution
  • Sensor configurations:
    Pt100 or Pt500; 2-wire or 4-wire, order dependent
  • Sensor wire detection:
    Automatic 2-wire / 4-wire detection
  • Temperature sensor cable limit:
    Up to 10 m under the stated EN 1434 / MID conditions
  • Display:
    8-digit LCD with function symbols
  • Display operation:
    Single push button; six numbered menu loops
  • Energy calculation interval:
    At least once every 2 s; low-pulse operation also uses an 8 s value
  • Main display loop:
    Energy, volume, flow rate and temperature
  • Heating/cooling tariff loop:
    Loop 5 additionally active for combined configuration
  • History memory:
    24 periods: months, weeks or days
  • Data logger:
    440 records; default interval 24 hours
  • Selectable logging intervals:
    5, 6, 10, 12, 15, 20, 30 or 60 min; 24 h
  • Event memory capacity:
    Up to 127 entries
  • Data retention:
    Non-volatile EEPROM
  • Accounting-date memories:
    Two independently programmable dates
  • Optical readout interface:
    ZVEI / IrDA with M-Bus protocol; 300 or 2400 baud
  • Enclosure protection:
    IP54
  • Mounting:
    Wall or panel
  • Catalog ambient range:
    5-55 C
  • Storage temperature:
    -25 to +70 C
  • Relative ambient humidity:
    Less than 93%
  • Standard flow input:
    IN0: terminal 10 (+ pulse), terminal 11 (ground)
  • Flow pulse scale options:
    1-1000 L/pulse or 1-100 gal/pulse; exact scale is order dependent
  • Flow input pulse timing:
    ON >=3 ms; OFF >=2 ms
  • Flow input internal voltage:
    3.6 V DC
  • Flow input cable limit:
    10 m; shielded cable recommended
  • Installation position:
    Hot or cold line as selected by order code
  • Expansion ports:
    Two; configuration depends on installed modules
  • Optional function modules:
    2 pulse inputs; 2 pulse outputs; combined 2 inputs / 1 output
  • Optional communication modules:
    M-Bus, RS232 or RS485 using M-Bus protocol
  • Optional current module:
    2 passive 4-20 mA outputs; occupies both ports
  • Current module external supply:
    10-30 V DC
  • Current module maximum load:
    800 ohm
  • Current alarm values:
    3.5 mA or 22.6 mA programmable; default 3.5 mA
  • Supply choices:
    3.6 V D-cell; 230 V AC module; 24 V AC module; verify installed option
  • 230 V AC module operating range:
    195-253 V AC, 50/60 Hz
  • 24 V AC module operating range:
    12-30 V AC
  • Typical D-cell life:
    10 years without add-on modules at ambient <=40 C
  • Mains backup behavior:
    Readings, clock and communications maintained; measuring functions stopped

Information

Overview Manuals Common Applications Product Precautions
Siemens SITRANS FU E950 combines a flowmeter pulse signal with hot- and cold-line temperatures to calculate thermal energy. The modular calculator supports configured heating, cooling or combined heating/cooling applications with water.
  • Combines flow pulses with hot- and cold-line temperatures
  • Provides an 8-digit LCD and six menu loops
  • Stores history, logged values and recorded faults
  • Accepts order-dependent supply and expansion modules

Match IN0 to the connected flowmeter's pulse value and retain the configured hot/cold installation position. The 2022 catalog identifies FUS380/FUE380, MAG 5000/6000 and FST020 arrangements; it excludes SITRANS FX and FC and does not authorize every clamp-on flowmeter.

Important Notice: The family name does not identify fitted options. Confirm the complete order code, sensor setup, pulse scale, supply module and approval label before wiring or commissioning.

Siemens SITRANS FU E950 Manuals & Downloads
Siemens SITRANS FU E950 Technical Reference (PDF)Siemens SITRANS FU E950 Manufacturer Catalog (PDF)

The first document explains thermal-energy calculation, input matching and configuration limits. The second is the unchanged Siemens FUE950 catalog with selection data and connection diagrams.

District heating energy
Calculates energy from flow volume and hot/cold temperatures in a configured heating installation.
Chilled-water metering
Supports the selected cooling arrangement and its corresponding temperature and approval conditions.
Combined heat and cooling
Uses the configured combined application with the additional tariff menu loop and separate accounting functions.
Consumption logging
Retains periodic history and configurable logged values for later readout through the fitted interface.
Read the applicable SITRANS FUE950 instructions before work. Verify Siemens SITRANS FU E950, the complete order code, flowmeter pulse setting and installed supply before connection.
1
Match the flowmeter output pulse value to the calculator IN0 setting.
2
Retain the configured hot- or cold-line position of the flowmeter.
3
Identify hot and cold sensor pairs before connecting temperature terminals.
4
Use the selected Pt100 or Pt500 setup with its 2-wire or 4-wire connection.
5
Verify the fitted power module; battery, 230 V AC and 24 V AC are alternatives.
6
Keep the flow-input cable within 10 m and preserve its shielding arrangement.
7
Allow both ports for the current-output module; do not add another module beside it.
8
Confirm live measurement after power restoration; mains backup does not continue measuring.

Technical notes

FUE950 is the manufacturer family designation; the full 7ME3480 order code determines the pulse value, installation position, sensor setup, supply, modules and approval marking. Match the flowmeter pulse output to IN0 and keep the hot and cold sensor identities distinct. Mains backup maintains stored readings and communications, but stops measurement; the optional current-output module occupies both expansion ports.

FAQ View All FAQ

  • Why must the flowmeter pulse value match FUE950 IN0?
    Every incoming pulse represents the configured volume. A mismatch between the flowmeter output and IN0 scales the recorded volume incorrectly and therefore affects calculated energy. Compare both settings, rather than only checking that pulses arrive.
  • Does the family name tell me whether the flowmeter belongs in the hot or cold pipe?
    No. The application and installation-position fields of the order code select the pipe. Heating codes A/B and cooling codes C/D use different arrangements; combined heating/cooling uses E/F. Retain the position shown on the device label and display.
  • Can a two-wire temperature pair be replaced without checking the sensor setup?
    Wire count alone is not enough. The calculator accepts configured Pt100 or Pt500 sensors and detects 2-wire or 4-wire connections automatically. The sensor type, paired hot/cold identities and approval conditions must still match the installed setup.
  • Why can no second expansion module be fitted beside the 4-20 mA module?
    The dual passive-current module is connected through port 1 but occupies both expansion ports. Its channels normally represent power and flow, and require an external 10-30 V DC supply. It is not a spare-port configuration.
  • What continues working when a mains-powered calculator switches to its backup battery?
    Displayed values, date and time remain updated and communication remains available. Measurement stops, including flow measurement. Backup operation must not be described as uninterrupted energy metering.
  • Why does combined heating/cooling show an additional display loop?
    The combined configuration activates tariff loop 5 in addition to the preconfigured main data loop. The display menus follow the ordered application and selected settings, so symbols or loops are not proof that all optional modules are fitted.
  • How does changing the logging interval affect retained history?
    The logger holds 440 records. The catalog examples give 36.6 hours at 5-minute intervals, 110 hours at 15 minutes, 18.3 days at one hour and 440 days at the default 24-hour interval. The separate 24-period history memory is a different function.
  • Can FUE950 be paired indiscriminately with any SITRANS flowmeter?
    No. The 2022 integration list identifies FUS380/FUE380, MAG 5000/6000 and FST020 arrangements. It explicitly excludes the FX and FC product groups and supports only some clamp-on products. Pulse scale and the approved application must also match.
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