OverviewSingle/three-phase energy analyzer (up to 3 single-phase lines) providing overall Class 1 accuracy when paired with FEMTO PRO F and FCTS flexible split-core CTs. Designed for DIN-rail installation with compact 4-module width and RJ45/removable terminal connections. Power supply 230–240 VAC. Compliant with EN 50470-1 and EN 50470-3.
Measured parameters and functions- THD and TDD measurement on voltage and current
- Neutral current monitoring
- Maximum and minimum voltage detection
- Maximum current and maximum power measurement
- Active energy measurement per phase
- Phase sequence detection and configurable phase settings
Alarms, timers and logic- Four independent operating timers
- Eight configurable alarms
- Support for complex logic conditions to generate alarms
User interface and indicators- Graphical LCD display for measurements and menus
- Calibration LED indicator
Communication and firmware- Modbus-RTU communication over RS485
- Firmware remotely upgradeable
- Expandable via PUK codes for future feature upgrades post-installation
Mechanical and installation- DIN-rail mounting, 4 modules width
- Installation using RJ45 connectors and removable terminal blocks
Power and compliance- Power supply: 230–240 VAC
- Standards: EN 50470-1 and EN 50470-3
Product codePRA64-F0102-E00
Available documentation- Femto Pro Product Sheet - Atto Pro (PDF)
- Femto Pro D4 RS485 PLUG SERIES Installation Instructions (PDF)
Technical specifications- Supported configurations: Single-phase and three-phase (up to 3 single-phase lines)
- Overall accuracy: Class 1 (with FEMTO PRO F + FCTS flexible CTs)
- CT connection: FCTS series flexible split-core CTs (CTs not included)
- Configurable CT full scale: up to 4000 A
- Power measurements: maximum current, maximum power, active energy per phase
- Power quality measurements: THD and TDD on voltage and current
- Neutral monitoring: neutral current measurement
- Voltage monitoring: maximum and minimum voltage
- Phase functions: phase sequence detection and configurable phase settings
- Timers: 4 operating timers
- Alarms: 8 configurable alarms with complex logic support
- Display: graphical LCD
- Indicator: calibration LED
- Communication protocol: Modbus-RTU over RS485
- Firmware: remotely upgradeable and PUK-expandable
- Mounting: DIN-rail (4 modules)
- Connections: RJ45 connectors and removable terminal blocks
- Power supply: 230–240 VAC
- Standards: EN 50470-1, EN 50470-3