The Femto D4 and Atto D4 are respectively energy meters/analyzers and energy transducers/analyzers, extremely versatile, precise and microprocessor based. Designed to satisfy the most sophisticated applications for monitoring electrical parameters and managing energy in the civil, commercial and industrial sectors. Equipped with RS485 port, LED for active energy, indication of the phases sequence, 4 x operating time counters and firmware that can be upgraded remotely. Available in versions with digital inputs and / or digital or analogue outputs. Compliant with EN 50470-1 + EN 50470-3. True-RMS and accurate measurements Measurements in true effective value (True-RMS), obtained by continuously sampling the waveforms of voltages and currents, and the automatic offset compensation of the internal amplifiers ensure maximum precision regardless of the variability of loads over time (ex. spot welders), from the signal level and the environmental operating conditions. The 64-bit resolution also ensures a high accuracy of the energy measurement even in the presence of small loads (e.g. equipment in stand-by). The Femto D4 is equipped with a graphic LCD display (dot matrix) with blue LED backlighting and adjustable contrast. Simultaneous reading of 4 measurements and their identification symbol with high visibility characters. WimjacmiiEX Femto Eneigy onaty/e* The 3-key keypad allows a simple and rational use of the instrument, while the page displayed at start-up can be defined by the user. On the front panel a configurable red LED for the calibration, pulses with a frequency proportional to energy. The Femto D4 and Atto D4 are suitable for applications on all types of network, three-phase 3-wire and 4-wire, symmetric or asymmetric, balanced or unbalanced, two-phase, singlephase, low and medium voltage, with 1,2 or 3 CTs as well as for measurements on 2/4 quadrants (import / export). A keyboard programming allows you to set all the operating parameters such as RS485 port, network type, LV / ML, CT ratio and any VT (free value), integration time (1-60 min.) And depending on the version: analog and digital outputs, relay and alarm (thresholds, delay and hysteresis), analog and digital inputs. The programming system is password protected. All the Instantaneous measurements are calculated on 10 cycles, for e.g. 200mS at 50Hz (1) Average values on Integration time (1 .. 60 mIn programmable) and peak (MD). (2) Average values (moving average) both In Import and In Export on the Integration tIme (1..60 mIn programmable) and peaks (MD) or the maxImum average value. (3) Maximum power values In both Import and Export. (4) Non-resettable life time and four partial operating time counters. (5) The energIes (whIch consIder the CT ratIo) In both Import and Export are dIsplayed as 9 digits (one decimal). The Internal counters are stored In 64-bit resolution which ensures a minimum definition of 0.1 Wh and a maximum count of 100 GWh. (6) Only for versions with digital Inputs. (7) For use with Electrex Flex CT - primary value as listed (8) Three partial counters for each measurement marked In column P. The Femto D4 & Atto D4 meet the essential requirements of the EN 50470-1 + 50470-3 standards as well as for the 62053-22 as required for White Energy Certificates normative. Electrex is a brand of Akse srl Via Aldo Moro, 39 42124 Reggio Emilia Italy Tel. +39 0522 924 244 Email: [email protected] Web: www.electrex.it BimmnHm the energy saving technology Engineered and manufactured in Italy Pensato, progettato e prodotto in Italia

Serial port communication The Femto and Atto are equipped, as a standard feature in all types, with an RS485 serial port with overvoltage protection. The communication protocol used is the “full compliant” Modbus-RTU suitable for communications with PLC and SCADA programs. The processed data are read as numeric registers composed of mantissa and exponent in IEEE format. A transmission up to 38.400bps with max. 125 registers that can be requested per each query (equal to about 62 parameters) without waiting times between two requests ensure an unrivalled communication speed. Indication of the...

The versions .. 2DO or 4DO or 1RO are equipped with outputs which can be related to the internal alarms. Each alarm can be linked to any one of the parameters available, for example, either as a minimum and/or as a maximum. All the alarm outputs can be linked to the same parameter in order to have more alarm thresholds. It is possible to set a delay on the activation / deactivation of each alarm (from 1s to 99 min), the hysteresis (% of the threshold value) and the polarity of the output contact (NA, NC, except for the 1RO which is always NC). The alarms state information is always available...

Electrex is a brand of Akse srl Via Aldo Moro, 39 42124 Reggio Emilia Italy Tel. +39 0522 924 244 Email: [email protected] Web: www.electrex.it Other versions of Femto D4 and Atto D4 Building code 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: [email protected] Subject to modification without prior notice Data sheet Femto D4 and Atto D4 2021 05 19-ENG BimmnHmthe energy saving technology 4 Engineered and manufactured in Italy Pensato, progettato e prodotto in Italia