Page 27 - 2020 Catalog

ENERGY MONITORING

ORDERING SPECIFICATIONS
EM-RS485 Power Supply Input 12-30VDC/24VAC , 100mA max.
(1)
RS485 = Modbus & BACnet RS-485 2-wire, BACnet MS/TP, Modbus RTU
CVT Current/voltage Output Baud Rates 9600, 19200, 38400, 57600, 76800, 115200 ENERGY MONITORING
transducers RS-485 Loading 1/4 unit
See page 32 Conductor gauge 14-26 AWG
Wiring Requirements
Terminal torque rating 0.5 min, 0.6 max
CVT Connections 3.5 +/- 0.5 VDC, short circuit current is 10mA
Dual Inputs
max
Pulse Rate 50 Hz (default), configurable up to 500 Hz
CVT Status LEDs Pulse Inputs Pulse active <100 ohms
Pulse Undefined 100-1000 ohms
Serial Number
Pulse Idle >1000 ohms EM-RS485
1Ph, 2Ph, 3Ph Wye (4-Wire), 3Ph Delta (3-
Configurations
LED
Wire)
Line Status
Service Types Voltages 90VL-N through 600VL-L
Setup Button
Frequency 45-65 Hz
Meter Accuracy 0.2% (ANSI C12.20 Class 0.2 standards)
120Ω Bus termination resistor
510Ω Pullup bias resistor
510Ω Pulldown bias resistor
Performance
EM-RS485
System Accuracy 1% for V, A, kW, kVAR, kVA
Device
Status LED
Operating Temperature 32 to 140F (0 to 60C)
RS485
Environment Humidity 0-95% non-condensing
Status LED
Material Polycarbonate/ABS
B A Meter Enclosure
( ) (+) 2 1
Dimensions 4.1”h x 1.8”w x 0.9”d
Agency UL Listed, File E501430, CE, RoHS
Compliance USA Meets ANSI C12.20 Class 0.2 Standards
Power
Ground
RS-485 +
RS-485 -
State Meets WA State Clean Building bill
Pulse Input 1
Pulse Input 2
(1) One side of transformer secondary is connected to signal common. Dedicated transformer is recommended.
Pulse Input Ground
Isolated Ground/Shield
12-30VDC/24VAC 1
TYPICAL OUTPUT POINTS (SEE PROTOCAOL GUIDES FOR COMPREHENSIVE POINTS LIST)
Bi-Directional Energy Measurements*
Power (3-phase Total and Per Phase): Real (kW), Reactive (kVAR), and Apparent (KVA)
Power Factor: 3-phase Average and Per Phase
Present Power Demand Real (kW), Reactive (kVAR), and Apparent (kVA)
Magnetic mount--no
Import and Export totals of Present Power Demand: Real (kW), Reactive (kVAR), and Apparent (kVA)
Current (3-Phase Average and Per Phase)
Slide On Voltage: Line-Line and Line-Neutral (3-Phase Average and Per Phase)
Frequency
Accumulated Net Energy: Real (kWh), Reactive (kVARh), and Apparent (kVAh)*
DIN Rail Accumulated Real Energy per Phase: Real (kWh), Reactive (kVARh), and Apparent (kVAh)
Import and Export Accumulators of Real and Apparent Energy
Slide On
Reactive Energy Accumulators (3-Phase Total and Per Phase)
Demand Interval Configuration Fixed or Rolling Block
Demand Interval Configuration: External Sync to Comms (Time Inputs or Protocol)
DIN Rail
EM BACnet Protocol Guide EM Modbus Protocol Guide
▪ www.senvainc.com/emrs485bn ▪ www.senvainc.com/emrs485mb

Snap-in mounting

BACnet® is a registered trademark of ASHRAE.

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