The QI-Power-485 is a single phase power meter used to monitor the RMS AC of DC current and voltage levels in a network. The range consists of 4 different models that cover different voltage and current ranges. Units are available for low currents of up to 50A and higher current levels of up to 300A, plus voltage ranges of up to 100V and up to 1,000V. All 4 units provide an RS485 Modbus RTU output including the following parameters: IRMS, VRMS, Watt, Var, Va, Ipk, Frequency, Cosφ, Energy bidirectional and THD. Units are fully configurable via RS485 or the Facile QI-POWER-485 software via a RS485 to USB converter.

Specifications

• Range QI-POWER-485-300
• Current: 300A AC / 400A DC
• Voltage: 800V AC / 1000V DC
• Range QI-POWER-485-300-LV
• Current: 300A AC / 400A DC
• Voltage: 80V AC / 100V DC
• Range QI-POWER-485
• Current: 50AC/DC
• Voltage: 800V AC / 1000V DC
• Range QI-POWER-485-LV
• Current: 50A AC / DC
• Voltage: 80V AC / 100V DC
• Power Supply: 9...30 Vdc, < 1,3 W,  Protection against polarity reversal and over temperature
• Measurement: RMS or DC
• Accuracy: @ 25°C up to 200Hz 
• Voltage, Current, Active Power : < 0,5% F.S.
• Frequency : +/- 0,1 Hz
• Energy : +/- 1% of reading
• Vpeak, I peak: +/- 5% f.s.
• Output: RS485 Modbus RTU
• Baud Rate: from 1200...115200 Baud
• Crest Factor: 1,4 (on current measurement)
• Frequency: DC or 1...400 Hz
• Sampling Rate: 11k Samples per Second
• Input Impedance: 1 Mohm +/-1%
• Standards: CE EN61000-6-4/2006 + A1 2011; EN64000-6-2/2005 ; EN61010-1/2010
• Over-voltage Category: Cat III up to 600V ; Cat II up to 1000V.
• Isolation: 3 kV on bare wire for Current measure,4 kV for Voltage measure (reinforced insulation to power supply and serial output)
• Protection: IP20
• Temperature Coefficient: < 200 ppm/°C
• Working Temperature: -15...+65°C
• Humidity: 10...90% not condensing
• Altitude: Up to 2000 m s.l.m.

Facile QI-POWER-485 Interface Software

The free interface program Facile QI-POWER-485 is the fastest way to configure the device. The software has only one configuration screen, shown on the right, which allows all the parameters to be configured. The changes made to the program act on the Modbus registers of the QI-POWER-485. In the event you need to restore the default configuration, just press the button FACTORY DEFAULT and the original settings will be restored.

Using a serial link RS485-USB (eg. USB-i485 RS485 to USB Converter) you can connect the QI-POWER-485 with the interface program FACILE QI-POWER-485. The software allows you to set the Modbus address, baudrate, delay, the TV and TA ratio, to modify a filter in order to have fastest responce time instead of a more stable measurement (filter range from 1-speed to 5-accuracy) and to measure frequency on current channel instead of voltage channel. The software is available to download free of charge.

A second way to programming the QI-POWER-485 is by using the Modbus Register Map directly. The register map is available on request.