Generator Auto Controller HGM1790N (GC1790N) Overview This compact generator controller provides automatic and manual start stop control, monitoring, and protection for single generator sets and pump units. It collects and analyzes key signals such as voltage, current, frequency, speed, water temperature, and oil pressure to present clear status and fault information on a backlit graphical LCD. Key benefits Reliable protection: Monitors critical parameters and triggers alarms and protective shutdowns to reduce equipment damage and downtime. Flexible control: Supports manual, automatic, and remote start stop modes and multiple configurable start conditions. Easy commissioning and maintenance: Front panel configuration and USB communications to PC software allow quick parameter changes and diagnostics. Compact, panelmount design: Small shell and standard panel cutout simplify installation in control panels or cabinets. Core functions Automatic and manual start stop with remote start stop input Realtime display of singlephase voltage, current, frequency, power, and load percentage Fault status display and audible/visual alarm indications for prompt maintenance Configurable thresholds and delay values via front panel or USB PC connection Programmable logic for relay outputs to assign fuel, start, preheat, alarm, or other functions Specifications Model: HGM1790N (GC1790N) Display: Graphical LCD with backlight Operation panel: Silicone panel and touch buttons Controller language: English Power supply: DC 8 to 35 V AC system: Single phase, 2 wire Generator voltage range: 15 to 360 V phase to neutral Alternator frequency: 50 or 60 Hz Digital input: 1 programmable input Analog input: 1 Relay outputs: 5 total (2 fixed outputs for fuel and start, 3 programmable outputs) Programmable interface: USB DC for PC communication Speed sensor voltage: 1 to 24 V RMS Speed sensor frequency: Up to 10000 Hz CT secondary rated current: 5 A Shell size: Approx. 95 x 86 x 46.5 mm Panel opening: Approx. 78 x 66 mm Working temperature: 25 to 70 C I O details and configuration One programmable input can be used as a switch input or liquid level sensor input Two fixed relay outputs dedicated to fuel output and start output for straightforward wiring Three programmable relay outputs can be assigned to alarm, preheat, common alarm, or other control functions USB interface enables parameter upload download and monitoring with compatible PC software Performance and compatibility Wide input voltage range allows use with typical battery starting systems Supports common speed sensor signals and CT inputs for accurate engine and alternator monitoring Single phase 2 wire compatibility makes the controller suitable for small generators and singlephase alternator installations Typical applications Backup power systems for small commercial buildings and residential facilities that require automatic transfer to generator operation Industrial pump control where reliable automatic start stop and protection of the generator set are required Standalone generator sets used for construction sites, remote power, or mobile installations where compact size and simple panel mounting are important Package contents 1 x Controller 2 x Mounting screws 1 x User manual What this controller delivers The HGM1790N (GC1790N) is a practical, compact controller that combines monitoring, protection, and flexible control for single generator sets. It reduces system risk with configurable protections, simplifies installation with standard panel dimensions, and speeds serviceability through clear fault display and USB programming.