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Type 340 N2 Metasys Btu Transmitter

The Series 340N2 BTU transmitter is an economical, compact device for sub-metering applications using Johnson Controls Metasys Network Companion™ and Facilitator™ Supervisory Systems.

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  • Temperature Range
    -29...70 °C
    -20...158 °F
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An economical, compact device for sub-metering applications using Johnson Controls Metasys® Network Companion and Facilitator Supervision System.

Calculates thermal energy in a closed pipe hydronic system by integrating the flow and temperature inputs.

  • On-board microcontroller and digital circuitry make precise measurements and produce accurate, drift-free outputs.
  • Accepts the signal from any Data Industrial raw pulse flow sensor, as well as many other pulse and sine wave devices.
  • Calculates thermal energy by measuring liquid flow in a closed pipe hydronic system by integrating the flow and temperature inputs.

 

 

 

 


Specifications

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  • Flow Sensor Input - All Sensors
    Separate excitation voltage is provided for three wire sensors 7.9…11.4V DC
    with 270 Ω source impedance
    Separate excitation voltage is provided for three wire sensors 7.9…11.4V DC
    with 270 Ω source impedance
  • N2 Output
    RS-485 output compliant with EIA/TIA-485 standards
    RS-485 output compliant with EIA/TIA-485 standards
  • Power - Current Draw
    60 mA at 12V DC
    60 mA at 12V DC
  • Power Supply Options
    12…35V DC ±5% |12…24V AC ±10%
    12…35V DC ±5% |12…24V AC ±10%
  • Pulse Output - Closed (on) state
    • Load current, 700 mA max. over operating temperature range
    • On-resistance, 700 mΩ max. over operating temperature range
    • Load current, 700 mA max. over operating temperature range
    • On-resistance, 700 mΩ max. over operating temperature range
  • Pulse Output - Open (off) state
    Leakage at 1580 F (70° C) <1μA at 60V (DC or AC peak)
    Leakage at 1580 F (70° C) <1μA at 60V (DC or AC peak)
  • Pulse Output - Operating voltage range
    0…±60V (DC or AC peak)
    0…±60V (DC or AC peak)
  • Pulse Type Sensors - Frequency
    0.4…1.0 kHz
    0.4…1.0 kHz
  • Pulse Type Sensors - Pull-up
    To 9.1V DC with 2 kΩ
    To 9.1V DC with 2 kΩ
  • Pulse Type Sensors - Signal Limits
    Vin < 35V (DC or AC peak)
    Vin < 35V (DC or AC peak)
  • Pulse Type Sensors - Signal Amplitude
    2.5V DC threshold
    2.5V DC threshold
  • Sine Wave Sensors - Frequency
    0.4…1.0 kHz
    0.4…1.0 kHz
  • Sine Wave Sensors - Signal Amplitude
    10 mV p-p threshold
    10 mV p-p threshold
  • Sine Wave Sensors - Signal Limits
    Vin < 35V (DC or AC peak)
    Vin < 35V (DC or AC peak)
  • Temperature Sensor Input
    Two required: 10 kΩ thermistor, 2 wire, type II, 10 kΩ at 77° F (25° C)
    Two required: 10 kΩ thermistor, 2 wire, type II, 10 kΩ at 77° F (25° C)
  • Temperature
    Operating Temperature: –29…70 °C
    Storage Temperature: –40… 85 °C
    Operating Temperature: –20…158 °F 
    Storage Temperature: –40…185 °F
  • Weight
    4.8 oz with headers installed
    4.8 oz with headers installed
  • Sensor Calibration
    Data Industrial: Use K and offset values provided in sensor owners manual
    Other Sensors: Check with factory
    Data Industrial: Use K and offset values provided in sensor owners manual
    Other Sensors: Check with factory
  • Units of Measure - Flow
    Rate: gpm, gph, l/sec, l/min, l/hr, ft3/sec, ft3/min, ft3/hr, m3/sec, m3/min, m3/hr
    Total: gallons, liters, cubic feet, cubic meters
    Rate: gpm, gph, l/sec, l/min, l/hr, ft3/sec, ft3/min, ft3/hr, m3/sec, m3/min, m3/hr
    Total: gallons, liters, cubic feet, cubic meters
  • Units of Measure - Energy
    Rate: kBtu/min, kBtu/hr, kW, MW, hp, tons
    Total: Btu, kBtu, MBtu, kWh, MWh, kJ, MJ
    Rate: kBtu/min, kBtu/hr, kW, MW, hp, tons
    Total: Btu, kBtu, MBtu, kWh, MWh, kJ, MJ
  • Temperature Units
    Fahrenheit | Centigrade
    Fahrenheit | Centigrade
  • Programming
    Requires PC or laptop running Windows® 7, XP or Vista and
    A302-20 programming kit
    Requires PC or laptop running Windows® 7, XP or Vista and
    A302-20 programming kit
  • Accessories
    A302-20 programming kit
    A302-20 programming kit
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Market Applications

  • Building Design, HVAC & Plumbing

    Flow instrumentation solutions are a crucial aspect of building design, construction and operation for apartments, hospitals, schools, factories and other facilities. From HVAC and grounds management to plumbing and water services, our meters are specifically designed to provide solutions that are accurate and reliable, even under the most challenging conditions.

    View Solutions

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