WNC Series BACnet - Info - Continental Control Systems, LLC

WattNode^® BACnet^®— Downloads

Sales Brochure

These downloads apply to the following two families of WattNode meters for the BACnet protocol:

WattNode BACnet
WattNode Revenue for BACnet
WNC BACnet Brochure (PDF, 2 pages)

Manuals and Technical Documents

Short and long versions of manuals are available and apply to both the WattNode BACnet and WattNode Revenue for BACnet models.

Installation Guide

The short Installation Manual is intended for the electrician, contractor, or anyone installing network cabling.

WattNode BACnet Install Guide (PDF, 16 pages)

Installation and Reference Manual

The longer Installation and Reference Manual is intended for programmers, designers, and installers.

WattNode BACnet Reference Manual (PDF, 56 pages) Firmware Versions 1.20 and 1.13
MS-24 WattNode BACnet Revenue (PDF, 2 pages) Manual supplement for WattNode BACnet Revenue:

Prior Versions

Firmware Version 1.12: WattNode BACnet Reference Manual (PDF, 56 pages)
Firmware Version 1.10: WattNode BACnet Reference Manual (PDF, 56 pages)
Firmware Version 1.04, 1.04A: WattNode BACnet Reference Manual (PDF, 56 pages)

Firmware Updates

The WattNode BACnet production firmware version is periodically updated. The firmware can be field upgraded or the WattNode meter may be returned to the factory for firmware updates. There is a nominal charge for factory firmware updates unless they are needed to fix a bug under warranty. Unless you are experiencing problems, there is generally no reason to update the firmware.

See WattNode BACnet Versions for the full list of versions.

BACnet is a registered trademark of ASHRAE.

Description

The WattNode^® for BACnet^® (MS/TP) is a multi-function electric kilowatt-hour (kWh) energy and power meter that communicates on a EIA RS-485 network, measures 1, 2, or 3 phases with voltages from 120 to 600 Vac and currents from 5 to 6,000 amps in delta (phase to phase) and wye (phase to neutral) configurations.

Listed by BACnet Testing Laboratories

BACnet is a registered trademark of the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). ASHRAE does not endorse, approve or test products for compliance with ASHRAE standards. Compliance of listed products to requirements of ASHRAE Standard 135 is the responsibility of BACnet International’s BACnet Testing Laboratories (BTL). BTL^® is a registered trademark of BACnet International.

Diagnostic LEDs

Diagnostic LEDs provide a per-phase indication of power (green flashing) and negative power (red flashing) to help troubleshoot connection problems, like reversed CTs, or excessive line voltage. The WattNode BACnet meter also has a red/yellow/green communication LED to indicate traffic, configuration problems, bus contention and other conditions. See the manual for full descriptions.

Measurements

True RMS Power: Watts (Phase A, B, C, and sum of all phases)
Reactive Power: VARs (Phase A, B, C, and sum of all phases)
Power Factor: (Phase A, B, C, and average of all phases)
True RMS Energy: Kilo-Watthours kWh (Phase A, B, C, and sum of all phases)
Reactive Energy: kVAR-hours (Phase A, B, C)
AC Line Frequency
RMS Voltage: (Average and Phase A, B, C; line-to-line and line-to-neutral)
Computed RMS Current: (Phase A, B, C)
Demand
Peak Demand

WattNode^® BACnet^® – Features

WNC BN Model	RWNC BN Model	Features

		Meets ANSI C12.1 accuracy requirements when used with Accu-CT Class 0.6 current transformers.
		Small form factor for easy installation inside most electrical panels, see a sample installation diagram
		Pluggable screw terminals for easy wiring
		Nominal accuracy 0.5% (see Installation and Operation Manual for details )
		True RMS power even with leading or lagging power factor and chopped or distorted waveforms
		Measure variable speed motor drives used in HVAC, refrigeration, and pumping systems
		Safe CT’s (current transformers), output 0.333 Vac at rated current. Split core CTs for quick installation Solid core CTs are less expensive and prevent tampering CTBL large split-core CTs for high currents (standard and custom sizes) CTRC Rogowski Coils for tight spaces where rigid CTs do not fit
		UL, cUL Listed, CE Mark—Designed and tested for safety and use throughout North America and the European Union.
		Assembled in USA, qualified under the Buy American provision in the American Recovery and Reinvestment Act of 2009 (ARRA).
		Five year warranty

WattNode^® BACnet^® – Specifications

BACnet Communication

Protocol: BACnet MS/TP (RS-485)
Baud Rates: 9600, 19200, 38400, and 76800 baud
Duplex: Half (two-wire plus common)
Parity (default): N81 (no parity, eight data bits, one stop bit)
BACnet Buffer: 512 bytes (480 byte maximum APDU length)

EIA RS-485 Interface

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

Electrical

Line powered
Operating Voltage Range: –20% to +15% of nominal
Power Line Frequency: 50 or 60 Hz
CT Input: 0.333 Vac nominal, 0 to 0.5 Vac operating, 3 Vac maximum
Optional Temperature Input: see WattNode BACnet Option TM1 Specifications

Measurement Configurations

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

Accuracy

WattNode BACnet

0.5% nominal (see WNC BACnet Manual for details)

WattNode Revenue BACnet

0.5% nominal (see WNC BACnet 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).

Regulatory

Listed by BACnet Testing Laboratories (BTL)
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: -40°C to +75°C (-40°F to 167°F)
Altitude: Up to 2000 m (6560 ft)
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.
Indoor Use: Suitable for indoor use.
Outdoor Use: Suitable for outdoor use when mounted inside an electrical enclosure (Hammond Mfg., Type EJ Series) that is rated NEMA 3R or 4.

Mechanical

Case Dimensions

(Click on the image for a larger view.)

Enclosure:
- High impact, ABS plastic
- Flame Resistance Rating: 94V-0, IEC FV-0
- Size: 5.63 × 3.34 × 1.5 in. (143 × 85 × 38 mm)
- Weight: 10.8 oz (305 g)
Connectors: Euroblock style pluggable screw terminal blocks
- Green: 22 to 12 AWG (1.0 to 2.5 mm), 600 V
- Black: 22 to 12 AWG (1.0 to 2.5 mm), 300 V
- Screw torque 4.4 lbf·in (0.5 N·m)