ATS220 Automatic Transfer Switch Controller Overview The ATS220 controller manages automatic and manual transfer between mains and generator power. It provides real time monitoring of single phase voltage and frequency for both mains and generator, and shows ATS switch status on the front panel. All parameters can be configured using front panel buttons or via the PC port. Key benefits Reliable automatic switching between mains and generator to maintain continuous power without manual intervention. Clear status and measurement feedback on a 4 digit LED display for quick diagnosis and monitoring. Flexible configuration options on the front panel or from a PC for adaptation to different generator and mains setups. Compact panel mount design for straightforward installation in control panels and generator control systems. Features and functions Model: ATS220 ATS controller for mains and genset power systems. 32 bit microcontroller for stable and responsive control. 4 digit LED display showing mains phase voltage, mains frequency, generator phase voltage, and generator frequency. Automatic and manual ATS control modes. Simulated mains function with selectable crank conditions. Seven relay outputs with passive contacts, each rated up to 5 A at 250 VAC. One programmable switch input; effective when connected to battery negative. Front panel buttons for parameter setup; PC port for remote configuration. European style terminal connectors for secure wiring. Standard water proof rubber sealing; protection level IP54 with standard installation and up to IP65 when a waterproof ring is installed between the controller and the control panel. Wide DC operating voltage range DC 8 V to 36 V. Low power consumption: standby at 24 V up to 1 W, operation at 24 V up to 3 W. Electrical inputs and outputs Mains voltage input: single phase two wire 30 VAC to 300 VAC (phase to neutral). Generator voltage input: single phase two wire 30 VAC to 300 VAC (phase to neutral). Generator closing output: relay passive contact, max 5 A at 250 VAC. Mains power closing output: relay passive contact, max 5 A at 250 VAC. Unit startup output: relay passive contact, max 5 A at 250 VAC. Switch input: programmable, active when tied to battery negative. Physical and environmental Dimensions: 78 mm x 78 mm x 55 mm. Panel cutout hole size: 67 mm x 67 mm. Weight: 0.3 kg. Operating temperature range: 30 to 70 C. Storage temperature range: 40 to 85 C. Practical applications Backup power management for commercial buildings: automatic transfer to generator during mains loss and automatic when mains stabilizes. Remote sites and telecom cabinets: compact control for unattended generator start, transfer and monitoring. Construction sites and rental equipment: reliable ATS control for portable generator setups and temporary power systems. What is included ATS220 automatic transfer switch controller, ready for panel mounting with European style terminal connections. Technical note All relay outputs are passive contacts. Verify external wiring and load protection are appropriate for the application and the 5 A relay rating. Parameters can be adjusted on the front panel or via PC for compatibility with specific generator and mains characteristics.