DATAKOM DKM-250 DC Energy Analyzer and Earth Leakage Detector User Manual

DATAKOM DKM-250 DC Energy Analyzer and Earth Leakage Detector

Product Information

The DKM-250 is a precision instrument designed for measuring, displaying, and remote monitoring earth leakage and various DC parameters in a DC distribution box. It features a 32-bit ARM core microcontroller and operates within a voltage range of 19-270VDC. The unit has multiple current input options including external current shunt (standard), internal current shunt, Hall Effect sensor input, and 4-20mA analog input. It also has 2 programmable relay outputs, 2 programmable digital inputs, and a programmable 4-20mA analog output. The device is equipped with a fully isolated RS-485 Modbus RTU serial port for safe data transfer to automation and monitoring systems. It can output any measured value as an analog signal through its 4-20mA port, allowing easy connection to PLC systems. The DKM-250 also offers features such as displaying earth leakage in percentage, demand, min & max records, bidirectional current & power measurement, bidirectional kW-h energy counter, bidirectional A-h counter, hours run counter, front panel programming, wide operating temperature range, sealed front panel (IP65 with gasket), and a two- part connection system.

DESCRIPTION

• The DKM-250 is a precision instrument designed for measuring, displaying and remote monitoring earth leakage and various DC parameters in a DC distribution box.
• The unit features a 32-bit ARM core microcontroller.
• The unit is supplied from the measuring DC voltage input. Operating range is between 19 and 270VDC.

The current input of the unit is isolated from the rest of the circuit and has different circuit options:

• External current shunt (standard)
• Internal current shunt
• Hall Effect sensor input
• 4-20mA analog input

The unit has 2 digital inputs and 2 relay outputs, both of them programmable for required functions.

Thanks to its isolated RS-485 Modbus RTU comport, the device is free from ground potential difference issues and data are safely transferred to automation and monitoring systems. Program parameters may be uploaded to the unit through the RS-485 port.

The unit may output any measured value as analog signal through its 4-20mA port. This output allows easy connection to PLC systems.

FEATURES

• Displays earth leakage in %
• Various current input options
• 2 programmable relay outputs
• 2 programmable digital inputs
• Programmable 4-20mA analog output
• Demand, Min & Max records
• Fully isolated RS-485 serial port
• MODBUS-RTU communications
• Bidirectional current & power measurement
• Bidirectional kW-h energy counter
• Bidirectional A-h counter
• Hours run counter
• Front panel programming
• Wide operating temperature range
• Sealed front panel (IP65 with gasket)
• Two part connection system

CONNECTION DIAGRAM

INSTALLATION

Technical Specifications

• Supply Input: 19-270VDC
• Power Consumption: < 4W
• Voltage Measurement Input:
  • Measurement Range: 0-300V
  • Accuracy: 0.5%
• Current Measurement Input:
  • Measurement Range: -100mV to +100mV
  • Accuracy: 0.5%
  • Isolation: 1000V AC, 1 minute
• Internal Current Shunt Option:
  • Measurement Range: 0-15A
• Analog Output : 0-20mA
• Analog Output Precision: 16 bit
• Digital Input Range: 19 to 270VDC
• Relay Outputs: 5 Amps @ 28VDC
• Serial Port:
  • Signal Type: RS-485
  • Protocol: Modbus RTU
  • Data Rate: 2400-38400baud
  • Isolation: 1000V AC, 1 minute
• Max. Relative Humidity: 95% non-condensing
• Protection Degree: IP 65 (Front panel, w. gasket) IP 30 (Back panel)
• Enclosure: Flame retardant, ROHS compliant high temperature ABS/PC (UL94-V0)
• Installation: Flush mounting with rear brackets
• Dimensions: 102x102x53mm (WxHxD)
• Panel Cutout: 92x92mm
• Weight : 200 gr

EU Directives:

• 2014/35/EC (LVD)
• 2014/30/EC (EMC)

Reference Standards:

• EN 61010 (safety)
• EN 61326 (EMC)

PANEL CUTOUT

DATAKOM Electronics Ltd.

• Tel: +90-216 4668460
• Fax: +90-216 3646565
• e-mail: datakom@datakom.com.tr
• www.datakom.com.tr

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