DC Energy Meter with RS485 Communication

DJS5119 is a new generation of programmable intelligent instrument. The instrument supports DC signal monitoring of single voltage and current. It can be widely applied to DC signal equipment such as DC charging pile and DC power supply.

Description

Technical Parameters

DJS5119 DC Energy Meter with RS485 Communication is a new generation of programmable intelligent instrument. The instrument supports DC signal monitoring of single voltage and current. The DC Energy Meter with RS485 Communication can be widely applied to DC signal equipment such as DC charging piles and DC power supplies. Equipped with one RS485 communication interface and one infrared communication interface, this instrument supports the MODBUS-RTU and DL/T645-2007 communication protocols.

Table 1 Specifications for DC Energy Meter with RS485 Communication

Technical parameters			Parameters
Accuracy class	Voltage		Class 0.5
	Current		Class 0.5
	Energy		Class 1
Input	Measurement signal		DC voltage and DC current
	Voltage	Input scope	DC 0～7500V
		Linear measurement range	10%Un～120%Un(Un is rated voltage)
		Power consumption	< 0.5W
	Current	Input scope	DC shunt input current: (Chosen by customer)
			DC shunt output voltage: 75mV
		Linear measurement range	1%In～120%In(In is rated current)
		Power consumption	< 0.5W
Display	Displaying method		LCD displaying
Power supply	Voltage scope		DC9V～36V or DC/AC 18V～220V
	Power consumption		≤2W
Ambient temperature	Temperature		-25℃～+60℃ for operating and -40℃～+70℃ for storage
	Humidity		≤95%RH, no condensation and corrosive gases

1 Pulse output

The instrument has an electric energy pulse output, and the output mode is open-collector optocoupler output. The open-collector voltage is VCC ≤ 48V, the current IZ ≤ 20mA, and the pulse width should meet the requirement of 80 ms ± 20 ms.

2 Outline Dimension

The outline dimension of this instrument is shown in Table 1.

RS485 Communication Energy Meter

Terminals Definition

The wiring terminal diagram of this instrument is shown in Table 2, and the wiring terminal definitions are shown in Table 2.

DC Energy Meter

Table 2 Outline of the Instrument/Wiring Terminal Definitions

Port category	Terminals No.	Function	Description
Input	1	I+	Positive current input(+75mV)
	2	I-	Negative current input(0V)
	3	U+	Positive voltage input
	4	U-	Negative voltage input
Power	5	V+	Positive power supply or firing line
Power	6	V-	Negative power supply or null line
Output	7	+	Positive pulse output
	8	-	Negative pulse output
	9	+	Positive multi-function(second pulse) output
	10	-	Negative multi-function(second pulse) output
Communication	11	A	Positive RS485 communication interface
Communication	12	B	Negative RS485communication interface

2.3.2 Power Supply Wiring
RS485 Energy Meter

Table 3 Power Supply Wiring

Input Wiring (The shunt should be connected to the negative pole)

DC Energy Meter

Applications:

Inverters and converters
Photovoltaic combiner boxes, battery management systems
Charging piles
Wind farm monitoring and power feedback control

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