The DKM-409 is a precision instrument designed for displaying various AC parameters in a 3-phase distribution panel. Thanks to its isolated RS-485 Modbus RTU communication port, the device is free from ground potential difference issues and measured parameters are safely transferred to factory and building automation systems. The power supply of the unit is isolated, thus the same device can be used in both 230/400V and 120/208V systems. The graphic screen allows display of waveforms and harmonic analysis graphs. Various display screens can be scrolled automatically. The user configurable screen where any measured parameter set can be displayed, transforms the unit to a custom designed measurement panel. The unit fits into a standard 92x92mm panel opening. FEATURES: • True RMS measurements • Harmonic distortion display ( 31 harmonics) • Oscilloscope, waveform display • Max demand display • User configurable display screen • Fully isolated RS-485 serial port • MODBUS-RTU communication • 2 configurable relay outputs • Energy pulse output capability • Optically isolated, configurable digital inputs • Switched dual active-reactive power counters • Independent mains/generator energy metering • Configurable user counters • Voltage transformer ratio for MV applications • Password protected front panel programming • High visibility, 128x64 pixels graphic LCD • Reduced panel depth • Wide operating temperature range • Sealed front panel (IP54) • Plug-in connection system TECHNICAL SPECIFICATIONS: Power Supply Input: 170 - 275VAC, 50 - 60Hz nominal (± 10%) Measurement Input Range: Voltage inputs: 10 - 300 V AC (L-N) 20 - 520 V AC (L-L) Current inputs: 0.2 – 5.5 A AC Frequency: 30 - 100 Hz Accuracy: Voltage: 0.5%+1digit Current: 0.5%+1 digit Frequency: 0.5%+1 digit Power(kW,kVAr): 1.0%+2digit Power factor:2.0%+2digit Measurement Range: CT range: 5/5A to 5000/5A VT range: 1.0/1 to 5000.0/1 kW range: 1.0 kW to 50.0 MW Power Consumption: < 4 VA Voltage burden: < 0.1VA per phase Current burden: < 1VA per phase Relay Outputs: 5A @ 250VAC Digital Inputs: Active level: 5 to 30V-DC or AC Min pulse duration: 250ms. Isolation: 1000V AC, 1 minute Serial Port: Signal level: RS-485 Communication: Modbus RTU Data Rate: 9600 bauds, no parity, 1 bit stop. Isolation: 500V AC, 1minute Serial port cable: 2 wires twisted, shielded cable. Max 60pF/meter Operating Temperature: -20°C to +70°C (-4 to +158 ?F). Maximum humidity: 95% non-condensing. Degree of Protection: IP 54 (Front Panel) , IP 30 (Back panel) Enclosure: Non-flammable, ROHS compliant, ABS/PC (UL94-V0) Installation: Flush mounting with rear retaining brackets Dimensions: 102x102x53mm (WxHxD) Panel Cutout: 92x92mm Weight: 350 gr EU Directives Conformity: 2006/95/EC (low voltage) 2004/108/EC (EMC) Norms of reference: EN 61010 (safety requirements) EN 61326 (EMC requirements) WE DO NOT SHIP THIS PRODUCT TO USA AND CANADA