WattNode® BACnet® - Specifications
| AC Power Measurement for BACnet Networks, True Power, kWh Reactive Power, VARs, Power Factor, Individual Phase Measurements | 
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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): ± V maximum
- Driver Output Voltage (54Ω load): ± 1.5 V 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
Measurement Configurations
- Single phase: two or three wire
- Three phase: four wire wye
- Three phase: three wire delta
- Three phase: four wire delta
Accuracy
- 0.5% nominal (see manual for details)
Regulatory
- FCC Class B, EN 55022 Class B
- UL and cUL Listed (UL 61010-1)
- CE mark: Declaration of Conformity
- RoHS
Environmental
- Operating Temperature: –30°C to +55°C (–22°F to +131°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 3.2 mm), 600 V
- Black: 22 to 12 AWG (1.0 to 3.2 mm), 300 V
