WattNode® for LonWorks® – Specifications

These specifications apply to the following families of WattNode meters with the LonTalk® protocol:

Electrical

  • Line powered
  • Operating Voltage Range: –20% to +15% of the nominal rated voltage
  • Power Line Frequency: 50 or 60 Hz
  • CT Input: 0.333 Vac nominal, 0 to 0.5 Vac operating, 3 Vac maximum

Measurement Configurations

  • Single phase: two or three wire
  • Three phase, four wire wye
  • Three phase: three wire delta
  • Three phase: four wire delta

Communication

  • Protocol: Echelon’s® LonTalk® (ANSI/CEA-709.1-B-2002, EN 14908, GB/Z 20177.1-2006)
  • Transceiver: Echelon TP/FT-10
  • Bit Rate: 78 kbps
  • Maximum Nodes: 64 per subnet
  • Maximum Distance:
    • Free Topology: 500 meters
    • Bus Topology: 2700 meters
  • Maximum Stub Length:
    • Free Topology: Unlimited
    • Bus Topology: 3 meters

Accuracy

WattNode Plus for LonWorks

  • 0.5% nominal (see manuals for details)

WattNode Logger for LonWorks

  • 0.5% nominal (see manuals for details)
  • Clock accuracy: ± 2 minutes per year (battery backed)

WattNode Revenue for LonWorks

  • 0.5% nominal (see manual for details)
  • Meets accuracy requirements of the ANSI C12.1 standard when used with CCS CTs rated for IEEE C57.13 class 0.6 accuracy (see Revenue Grade CTs).
  • Clock accuracy: ± 2 minutes per year (battery backed) with Logger option.

Logging (Optional)

See WattNode Revenue Option L or WattNode Logger for LonWorks

  • Quantities Logged (one record)
    • Date and Time
    • Net Energy (A, B, C and Sum)
    • Reactive Energy (Sum)
    • Positive Energy (Sum)
    • Real and Reactive Power (A, B, C and Sum)
    • Voltage, Current and Power Factor (A, B, C)
    • Demand
  • Logging Intervals: 1 minute to 12 hours
  • Log Capacity: 24,000+ records

Regulatory

  • FCC Class B, EN 55022 Class B
  • UL and cUL Listed (UL 61010-1), file number E312220
  • CE Mark and RoHS Declaration of Conformity
  • Immunity: EN 61326: 2002 (Industrial Locations)

Environmental

  • Operating Temperature: –30° to 55°C
  • Humidity: Up to 90% RH (non-condensing)

Mechanical

WattNode-Case-Dimensions.png

Case Dimensions (Click on the image for a larger view.)

  • Enclosure:
    • High impact, ABS plastic
    • Flame Resistance Rating: 94V-0, IEC FV-0
    • Size: 6.1 × 3.35 × 1.5 in. (155 × 85 × 38.1 mm)
  • Weight: 10.4 oz (295 g)
  • Connectors: Euroblock style pluggable screw terminal blocks
  • Green: 22 to 12 AWG (1.0 to 3.2 mm), 600 V
  • Black: 22 to 12 AWG (1.0 to 3.2 mm), 300 V