Engineered and manufactured in Italy Pensato. progettato e prodotto in Italia Counter / analyzer of DC Energy Transducer of DC Energy Femto D4 DC is a counter / analyzer of DC Energy with backlight LCD graphic display, while the Atto D4 DC is a DC energy transducer. Both are equipped with an extremely accurate and versatile microprocessor designed to meet the most demanding applications of electrical parameters analyses and energy supply monitoring in the photovoltaic, telecommunication, battery systems, and more. Measures voltage, current, power a and energy, max and min values of voltage and current. Input of 60mV or 100mV for shunt. The instruments can be integrated with other Electrex products in order to set up a monitoring system for energy or other parameters (temperature, humidity, luminosity, etc.), alarms even with remote access (via GSM / Internet). In this way it is possible to constantly monitor the status of the plant, check promptly and automatically possible malfunctions (e.g. a string of the photovoltaic plant that stops producing photovoltaic energy), any theft or tampering (e.g. solar panels ) or access to restricted areas. The Femto D4 DC HALL and Atto D4 DC HALL have the same features of the Femto D4 DC and Atto D4 DC but have been designed for the CTS DC Hall current transformers connected to the instruments through specific converters. Measurement system_ All the readings are obtained with a continuous sampling of the voltage and current in order to ensure the maximum metering accuracy even for small loads. The Femto D4 DC are equipped with a graphic dot matrix LCD display with a LED backlight and adjustable contrast allows the simultaneous reading of 2 parameters and their symbols with high visibility digits. 3 keys make the instrument use simple and rational, while the page displayed when powering on the device is configurable by the user. Through a simple keyboard set up is possible to set all the operative parameters like integration time (1-60 min), digital outputs and alarms (threshold, delay and hysteresis), digital input, RS485 address. The set-up is password protected. The Atto D4 DC are equipped with 2 LED on the frontal panel denoting the device's status and the functioning of the RS485 port. Serial communication_ The Femto D4 DC and Atto DC are equipped, as standard feature on all types, with an optoinsulated and over-voltage protected RS485 serial communication port. The protocol is a full compliant Modbus- RTU suitable for communication with PLCs and with SCADA programs. The instrument data are read as numerical registers composed by mantissa and exponent in the IEEE format. A transmission speed of up to 38.400 bps, with maximum 125 registers (equivalent to 62 parameters) per query with no waiting time between queries, ensure an unrivalled communication speed and dialogue efficiency. Digital outputs_ The 2DO versions are equipped with two optically insulated transistor outputs rated 27 Vdc 27 mA per DIN 43864 standards. The two outputs are factory set to the transmission of pulses proportional to the imported and exported energy (pulse weight and length are user programmable). The outputs may be alternatively configured as outputs of the internal alarms (see Alarms) or as remote output devices controlled via serial line and Modbus commands. Digital input_ The 1DI versions are equipped with an optically insulated digital input complete with programmable filter for input glitches. The digital input is set to operate for external pulse count of, for example, water meters, gas meters (insulation to meet the ATEX requirements), quantity count, etc. Other user selectable operative modes are ON/OFF state input (example for reading the ON/OFF state of machines and switches) and tariff change input (example for day-night tariff changeover). The digital input requires an external 10-30Vdc power supply. Parameters Type Range (2) Average value (rolling average) over the integration time (1.. 60 min. programmable). (3) Import /Export average value (rolling average) over the integration time (1.. 60 min. programmable). (4) Microprocessor internal temperature (5) Import/Export energies displayed as 9 digits in floating-point readings; internal energy metering performed with 0,1 Wh minimum resolution and 99.999.999,9999 kWh maximum energy count before rollover. (6) Total and partial (versions with digital inputs)

(FaiiSsiaMfeMlEaM Counter / analyzer and Transducer of DC Energy Special versions on request_ Femto D4 DC and Atto DC in different hardware configurations are available on request. They include different power supply and Input/Output configurations. The 2DO versions are equipped with 2 outputs programmable as alarms offering the maximum configuration flexibility for adapting to the most diverse requirements. Each alarm can be related to any one of the parameters available, for example, either as a minimum and/or as a maximum. Linking of both alarms to the same parameter is also possible for operating...

Engineered and manufactured in Italy Pensato. progettato e prodotto in Italia (FaiiSsiaMfeMlEaM Counter / analyzer and Transducer of DC Energy Femto D4 DC HALL and Atto D4 DC HALL have the same features of the Femto D4 DC and Atto D4 DC but have been designed for the current transformers of the CTS DC Hall Mini Series which must be connected to the DC Channel Split Core Current Converter as shown in the diagram beside. The DC Channels Split Core Current Converter are available in the versions with 1 or 3 channels and serve as interface between the measuring instrument and the Split CTS Mini Series...

Counter / analyzer and Transducer of DC Energy Electrical Characteristics __________________________ Working Conditions Subject to modification without prior notice Datasheet Femto and Atto D4 DC, Hall and E-Wi 2015 02 24-ENG Electrex is a brand of Akse srl Via Aldo Moro, 39 - 42124 Reggio Emilia (RE) - Italy Tel : +39 0522 924244 - Fax : +39 0522 924245 www.electrex.it - email: