The LOVATO Electric ATL series is a scalable family of microprocessor-based automatic transfer switch (ATS) controllers designed to manage mains/generator changeover in low-voltage power distribution systems. Models range from the basic ATL100 (single-phase, DIN-rail) to the ATL900 (three sources + two tie-breakers, integrated PLC), covering applications from simple backup switching to complex multi-source power management with closed-transition transfer.

How do ATL models differ in power source handling?

The series scales across four source-handling tiers. ATL100–ATL610 manage two sources (mains + generator), with ATL100 supporting single-phase only. ATL800 adds a tie-breaker for two-generator-plus-mains configurations with closed-transition switching. ATL900 manages three independent sources plus two tie-breakers, with four current inputs for load monitoring. All models measure true RMS voltage on each phase and monitor for undervoltage, overvoltage, phase sequence, phase loss, asymmetry, and frequency deviation.

What expansion and communication options are available?

ATL610 and above accept EXP series expansion modules via a dedicated port. Available modules include EXP1000 (Modbus RTU RS485), EXP1001 (Modbus TCP Ethernet), EXP1002 (Profibus DP), and EXP1003 (USB/RS232 programming interface). ATL800 and ATL900 include built-in RS485 Modbus RTU. All models with communication integrate with LOVATO's Synergy energy management software for remote monitoring and data logging.

How does the display and programming interface vary?

ATL100 uses basic LED status indicators. ATL500 features a synoptic LED mimic diagram with NFC-based parameter programming. ATL600/601 add a backlit LCD text display with optical port. ATL610 upgrades to a 128×80px graphic LCD with context-sensitive soft keys. ATL800/900 use a larger 180×240mm form-factor LCD with expanded parameter visualization. All models support front-panel configuration through intuitive menu navigation without requiring a PC or proprietary software.