All the parameters can be set via front panel for easy and convenient operation; Modular design, anti-flaming ABS plastic enclosure, compact structure, convenient embedded installation. Two LED displays: single phase voltage display and total active power voltage display (calculated using single phase power, taking load as balanced); Multifunction LED display that can be switched between single phase frequency, single phase current, battery voltage, total running time (max 999 hours), engine and generator temperature; Under voltage, over voltage, under frequency, over frequency, over load, over temperature protection, starting with flashing lights alarm and followed by shutdown protection after alarm delay; Low oil pressure digital input that immediately shuts down the generator in case of low oil pressure; Displayed parameters can be using touch-buttons;Wide selection of temperature sensor types in settings; Technical Parameters: Display LED Nixie Tube Operation Panel PET Digital Input 1 Relay Output 2 Analogue Input 2 AC System 1P2W Alternator Voltage (30-360)V(ph-N) Alternator Frequency 50/60Hz Programmable Interface LINK DC Supply DC(9-18)V Case Dimensions(mm) 118x128x36mm Panel Cutout(mm) 112x122mm Operating Temp. (-25-+70) Product Overview: HGM501 gen-set controller is smart digital controller for control and protection of single-engine gen-sets. It can carry out start/stop, data measurement, alarm indication, shutdown protection and other functions. The controller is fitted with LED indicators; it is reliable and easy to use. HGM501 gen-set controller contains the microprocessor allows precise measurement of multiple parameters, which can be configured using controller front panel. With simple wiring, compact structure and high reliability, HGM501 can be widely used for data display and fault protection of a large number of and petrol generator sets. Colour:Black Material:Metal+ABS Package Contents: 1 x HGM501 Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.