Feature: 1. DSE4520 is a mains failure self‑starting generator controller, suitable for a variety of stand‑alone applications. 2. LCD display screen can display alarm information such as ordinary alarm, electrical trip and shutdown, and provide monitoring and protection functions. 3. Can monitor the engine speed, oil pressure, water temperature, oil level and the frequency, voltage, current power of the generator, and provide complete protection. 4. With multiple flexible input, output and protection functions, it supports diesel, gas and gasoline EFI and non‑EFI (generator frequency detection). 5. The parameters can be set through the DSE software, or the parameters can be edited on the front panel. Specification: Item Type: Generator Controller Function: Self-definable self-starting mains failure self-starting mode; Support J1939-75 and shield CAN alarm; Generator frequency and CAN detection speed; The largest backlit graphic display among similar products; Real-time clock; Can be set through the front panel or computer All parameters; Power saving mode; 3-phase generator detection; 3-phase mains detection; support for 600 V line voltage (LL system); Unit/load force monitoring (KW, KVA, KVAr, pf); Cumulative power monitoring (KWh, KVAh, KVArh); Overload protection; unit/load current detection and protection; Fuel and start output can be customized when connected to EFI; 4 custom DC outputs; 3 custom analog/digital inputs; 4 custom inputs Defined digital input; Self-defined hierarchical load output; 3 engine maintenance indications; Engine speed protection; Engine running time timer; Engine warm-up; Engine start and stop cycles can be preset; Engine start idling and shutdown idling control; Tier4 standard Engine instrument interface; Battery voltage monitoring; Start the unit when the battery voltage is low; Custom remote start input; 2 sets of protection parameters; Complete alarm, electrical trip and shutdown protection; LCD alarm indication; 50 event records Advantages: Small size and strong function; Automatic switching between mains and units; Real-time clock provides accurate event recording; Reasonable button layout, easy operation; Parameter setting using DSE setting software; Compatible with a variety of EFI engines including Tier4; Free PC software; IP65 grade (with gasket) better waterproof performance. Package List: 1 x Controller2 x Mounting Screws1 x User Manual Note: 1. Installation, connection and inspection must be carried out by personnel with professional knowledge.2. In the running state, please do not touch the controller to avoid dangerous accidents.