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CCS WattNode Wide-Range Modbus

Manufacturer:
The new WND-WR-MB provides over fifty electrical measurements over a Modbus RTU RS-485 network. Designed as a universal line-powered meter, it works on any utility service from 100 to 600 Vac, single or three-phase, wye, or delta.
Part Number: WND-WR-MB-RCM
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$613.00 ex GST
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The new WND-WR-MB provides over fifty electrical measurements over a Modbus RTU RS-485 network. Designed as a universal line-powered meter, it works on any utility service from 100 to 600 Vac, single or three-phase, wye, or delta.

The WND-WR-MB has the same dimensions as its WattNode Modbus predecessor but its expanded register map provides many unique features not previously offered in the submetering market. New registers include fast power for export limiting, registers to correct wiring errors remotely, potential transformer ratio for 4160 Vac and higher utility services, and SunSpec compliance.


Standard Features

  • Measures 100 to 600 Vac single-phase or three-phase, wye or delta
  • Line powered from 100 to 600 Vac, line-neutral or line-line
  • Correct wiring errors remotely
    • Change a CT's polarity
    • Change a CT to a different line voltage
  • PT ratio register for use with potential transformers
  • Current transformer disconnect detection
  • Modbus RTU, RS-485
  • For use with safe low voltage (0.333 Vac) CTs to 6000 ampsFast power feature for export limiting applications
  • Nine baud rates from 1.2K up to 115K
  • SunSpec compliant register list


Dimensions



General Options


Communication Options

Unless otherwise specified, the factory default communications options are: no parity, eight data bits, and one stop bit.

  • Option EP – Factory configure the Modbus RS-485 communications to default to even parity (E81)
    • This can be field configured using the ParityMode register if you have meters that were ordered without this option and you need even parity this can be overridden or turned off in the field by changing the ParityMode register.
  • Option 19K – Factory configure the RS-485 communications to 19,200 baud.
    • This can be changed in the field by switching the baud rate DIP switch, or by writing to the Baud register. If you write “0” to the BaudRate register, then the DIP switch setting will control the baud rate.
  • Option 38K – Factory configure the RS-485 communications to 38,400 baud. Position 8 of the DIP switch will be ignored.
    • This can be changed in the field by writing a new value to the BaudRate register. If you write “0” to the BaudRate register, then the DIP switch setting will control the baud rate.
  • Option TCP-RTU – Configure the communications to the Modbus TCP-RTU protocol option for use with RS-485 to Ethernet converters (serial device adapters).
    • This can be field configured or disabled with the ModbusMode register.
  • Option AD – Factory configure the Modbus address.
    • This can be changed in the field by by writing a new address to the Address register. If you write 0 (zero) to the Address register, then the DIP switch setting will specify the Modbus address.

Note: All WattNode Modbus meters can have their communication settings restored to factory shipped values by setting all DIP switch positions to “0” for ten seconds. If an communication option has been ordered, the meter will restore to include the settings from any options.

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

The new WND-WR-MB provides over fifty electrical measurements over a Modbus RTU RS-485 network. Designed as a universal line-powered meter, it works on any utility service from 100 to 600 Vac, single or three-phase, wye, or delta.

The WND-WR-MB has the same dimensions as its WattNode Modbus predecessor but its expanded register map provides many unique features not previously offered in the submetering market. New registers include fast power for export limiting, registers to correct wiring errors remotely, potential transformer ratio for 4160 Vac and higher utility services, and SunSpec compliance.


Standard Features

  • Measures 100 to 600 Vac single-phase or three-phase, wye or delta
  • Line powered from 100 to 600 Vac, line-neutral or line-line
  • Correct wiring errors remotely
    • Change a CT's polarity
    • Change a CT to a different line voltage
  • PT ratio register for use with potential transformers
  • Current transformer disconnect detection
  • Modbus RTU, RS-485
  • For use with safe low voltage (0.333 Vac) CTs to 6000 ampsFast power feature for export limiting applications
  • Nine baud rates from 1.2K up to 115K
  • SunSpec compliant register list


Dimensions



General Options


Communication Options

Unless otherwise specified, the factory default communications options are: no parity, eight data bits, and one stop bit.

  • Option EP – Factory configure the Modbus RS-485 communications to default to even parity (E81)
    • This can be field configured using the ParityMode register if you have meters that were ordered without this option and you need even parity this can be overridden or turned off in the field by changing the ParityMode register.
  • Option 19K – Factory configure the RS-485 communications to 19,200 baud.
    • This can be changed in the field by switching the baud rate DIP switch, or by writing to the Baud register. If you write “0” to the BaudRate register, then the DIP switch setting will control the baud rate.
  • Option 38K – Factory configure the RS-485 communications to 38,400 baud. Position 8 of the DIP switch will be ignored.
    • This can be changed in the field by writing a new value to the BaudRate register. If you write “0” to the BaudRate register, then the DIP switch setting will control the baud rate.
  • Option TCP-RTU – Configure the communications to the Modbus TCP-RTU protocol option for use with RS-485 to Ethernet converters (serial device adapters).
    • This can be field configured or disabled with the ModbusMode register.
  • Option AD – Factory configure the Modbus address.
    • This can be changed in the field by by writing a new address to the Address register. If you write 0 (zero) to the Address register, then the DIP switch setting will specify the Modbus address.

Note: All WattNode Modbus meters can have their communication settings restored to factory shipped values by setting all DIP switch positions to “0” for ten seconds. If an communication option has been ordered, the meter will restore to include the settings from any options.