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VP-EC-BCM-42CT

Branch Current Monitor CT Strip Interface

The VP-EC-BCM-42CT is a 42 point current transformer (CT) interface for the VP-EC-DCIM-BCM series gateways. Up to 2 interfaces can be used for a total of 84 CT’s in a 84 breaker panel system. Low voltage operation, circuit isolation and standard Modbus interface makes this the versatile interface for any branch current monitoring application.

Standard Features of the VP-EC-BC-42CT Interface:

• DIN Rail Mount Enclosure for simple installation
• Low Power (9 - 24 VDC), Nominal 24 VDC,
  Supplied from Gateway via CAT5e CableUp to 42 Current Transformers,
  21 CT's Max per strip on 1" Centers, Current Strip A and Current Strip B
• Jumper Selectable Ribbon Cable Entry, Default TOP, Optional BOTTOM
• CT Maximum Continuous, Primary Current = 60 A Max
• CT Insulation Voltage 3500 VAC/1Min
• True RMS Current Measurement
• RS-485 Output, Half Duplex, Fault Tolerant Isolated Driver IC, 2 x RJ45 Jack (Power and Data)
• MODBUS RTU Protocol, ID Dipswitch Selectable, Baud Rate Programmable, (9600 up to 115.2K Baud)
• Flash Microprocessor for Program Variable Storage and Digital Calibration
• High Precision 16 Bit A/D Converters
• 1500 VAC Isolation Between Signal Conditioning and Communication Circuitss
• LED Indicators, Blue Power, RS485 Tx(Red) and Rx (Green), Fault (Red)

Typical 21 Point CT Strips

Current Transformers:

• Talema AC1020 Current Transfornmers
• Nominal 20 Amp. 60 Amp Max int
• Insulation Voltage 3500 VAC/1Min
• Operating and Storage Temperature -45 °C thru +85 °C

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Specifications

Item	Metric	Value
I/O	Part Name :	Branch Current Monitor CT Strip Interface
	Part Number :	VP-EC-BCM-42CT
	Current Transformer Inputs:	42 (Two 26 Pin Ribbon Cable Headers, 21 inputs per connector)
Network Port	Protocol :	Modbus RTU RS485 2 wire RS-485, Half Duplex, Data A, Data B
	Baud Rate	9600 / 19.2K / 56K / 115.2K Baud, N81, Jumper Selectable
	Termination	Jumper Selectable Enable or Disable 120 Ohm Resistor
	Wiring	2 RJ45 Jacks, Power over Cat5e Cable
Processor	Processor :	FPGA
	A/D Converter :	16 Bit Resolution, 60 Samples per second per phase Complete update for 42 CT's = 4 Seconds
	Repeatability :	+/-1 % Full Scale
	Linearity :	+/-1 % Full Scale
	Resolution :	+/-0.5 % Full Scale
	Accuracy :	+/- 1% 2 to 60 AMP +/- 2% 0 to 2 AMP
Status LEDs	Power ON LED :	Blue LED Indicator (Always ON)
	RS485 LEDs :	Tx (Red), Rx (Green)
	Fault :	RED LED Flashes if any of the Current Transformers are not connected
	CV :	GREEN LED flashes on completion of all breaker readings
User Interface	8 Postion Dipswitch :	Modbus ID
Physical	Length :	4.183"
	Width :	3.551"
	Depth :	2.264"
	Weight :	200 g
	Weight, Shipping (Qty. 1) :	300 g
	Material :	ABS/PC Blend, UL94-V-O
	Mounting :	DIN rail mounting
Electrical	Power Input Voltage Range (Typical) :	24 VDC
	Power Input (Minimum) :	10 VDC
	Power Input (Maximum) :	28 VDC
	Current max :	100 mA
	Current typical :	125 mA
Ambient	Operating Temperature :	-20 to +65 °C
	Storage Temperature :	-20 to +65 °C
	Operating Relative Humidity (non-condensing) :	5 to 95 %RH )
	Storage Relative Humidity (non-condensing) :	0 to 95 %RH
	Protection :	IP20
Warranty	Limited Liability :	Product Replacement 1 Year
	Download :	Warranty Statement

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