CCS WattNode Wide-Range Modbus

Accuracy

• Nominal ±0.5%
• Meets the accuracy requirements of the ANSI C12.1 standard when used with CCS CTs rated for IEEE C57.13 class 0.6 accuracy (see Current Transformers Overview).
• Meets the ANSI C12.20-2010 class 0.5 standard for revenue metering with CTs when used with class 0.3 CTs (see Current Transformers Overview).

Electrical Measurements

• True RMS Energy: kWh per phase and sum
• True RMS Power: watts, per phase and sum
• Power Factor: per phase and average
• RMS voltage per phase and average
• RMS current per phase and average
• Reactive Energy: VAR hours per phase and sum
• Reactive Power: VARs, per phase and sum
• Demand and peak demand
• Frequency

Electrical

• Nominal Operating Voltage Range: 100 to 600 Vac (line-to-neutral or line-to-line)
• Line Frequency: 45 to 65 Hz
• Minimum Operating Voltage: 85 Vac
• Absolute Maximum Voltage: 690 Vac
• Supply Watts: <2 W
• Supply Volt-Amperes: <4 VA
• Power Factor: 0.6

Current Transformer Inputs

• Voltage Mode:
  • Nominal Input Voltage (At CT Rated Current): 0.33333 Vac RMS
  • Absolute Maximum Input Voltage: 5.0 Vac RMS
  • Input Impedance at 50-60 Hz: 23 kΩ
• Current Mode:
  
  • Nominal Input Current (At CT Rated Current): 40 mA RMS
  • Absolute Maximum Input Current: 200 mA RMS
  • Input Impedance at 50-60 Hz: 10 Ω

Modbus Communication

• Protocol: Modbus RTU (binary)
• Baud Rates: DIP switch selected 9600 or 19200. Register configurable: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 76800, and 115200 baud
• Address (ID) range: DIP switch selected 1 to 63. Register configurable: 1 to 247
• Duplex: Half (two-wire twisted pair with shield drain wire)
• Parity:
  
  • Standard (default): N81 (no parity, eight data bits, one stop bit)
  • Optional: E81 (even parity, eight data bits, one stop bit)
  • Optional: N82 (no parity, eight data bits, two stop bits)
• Modbus Buffer: 256 bytes
• Response Time (typical): 5 to 25 milliseconds (may be longer immediately after a Modbus write command, while values are saved to non-volatile memory)

EIA RS-485 Interface

• Output Isolation: 4500 Vac RMS
• Driver Output:
  
  • Voltage (Open Circuit): ± 6 Vdc maximum
  • Voltage (54Ω load): ± 1.5 Vdc minimum
  • Current (54Ω load): ± 60 mA typical
  • Rise Time (54Ω || 50 pF load): 900 nS typical
• Receiver:
  
  • Receiver Common-Mode Voltage Range: –7 to +12 Vdc maximum
  • Receiver Sensitivity: ±200 mV
  • Receiver Bus Load: 1/8 unit load (up to 256 WattNode meters per subnet)

Regulatory

• Safety: meets European Parliament Directive 2014/35/EU: Low Voltage Directive
• UL Listed (U.S. and Canada), file number E359088
• UL / IEC 61010-1, 3rd Edition
• CAN/CSA-C22.2 No. 61010-1-12, 3rd Edition
• FCC Class B, EN 55022 Class B
• EMC: meets European Parliament Directive 2014/30/EU: Electromagnetic Compatibility
  
  • EMC Requirements: EN 61326-1: 2013, industrial locations
  • Radiated Emissions: CISPR / EN 55011, Class B
  • Conducted Emissions: CISPR / EN 55011, Class B
  • Electrostatic Discharge: EN/IEC 61000-4-2: (B) Self-Recovering
  • Radiated RF Immunity: EN/IEC 61000-4-3: (A) NDegradation
  • Electrical Fast Transient / Burst: EN/IEC 61000-4-4: (A) NDegradation
  • Surge Immunity: EN/IEC 61000-4-5: (A) NDegradation
  • Conducted RF Immunity: EN/IEC 61000-4-6: (A) NDegradation
  • Power Frequency H-field Immunity: EN/IEC 61000-4-8: (A) NDegradation
  • Voltage Dips, Interrupts: EN/IEC 61000-4-11: (B) Self-Recovering
• CE Mark and RoHS Declaration of Conformity
• Immunity: EN 61326: 2002 (Industrial Locations)

Environmental

• Operating Temperature: –40°F to 176°F (–40°C to +80°C)
• Altitude: Up to 9842 ft (3000 m)
• Operating Humidity: 5 to 90% relative humidity (RH) up to 40°C, decreasing linearly to 50% RH at 55°C.
• Pollution: POLLUTION DEGREE 2 – Normally only non-conductive pollution; occasionally, a temporary conductivity caused by condensation must be expected.
• Degree of Protection: IP40 (>1 mm solids, no protection from liquids)
• Indoor Use: Suitable for indoor use.
• Outdoor Use: Suitable for outdoor use if mounted inside an electrical enclosure (Hammond Mfg., Type EJ Series or equivalent) rated NEMA 3R or 4 (IP 66)

Mechanical

• Case Material: PC-ABS
• Size: 6.0 x 3.4 x 1.5 in. (153 x 85 x 38 mm)
• Weight: 10.8 oz (307 gm)

Regulatory / Safety

• UL Listed (US and Canada), file number E359088
• UL / IEC 61010-1, 3rd Edition
• CAN/CSA-C22.2 No 61010-1-12, 3rd Edition
• FCC: Class B, FCC Part 15
• Meets European Parliament Directive 2014/35/EU:Low Voltage Directive
• Meets European Parliament Directive 2011/65/EU:Hazardous Substances
• Meets European Parliament Directive 2014/30/EU:Electromagnetic Compatibility
• CE, RoHS compliant