SG+ 1.5 Controller Description

The SG+ 1.5 controller is a two-piece, self contained microprocessor for diesel generator sets. The SG+ 1.5 display is mounted on the control box cover. The SG+ 1.5 microprocessor is mounted inside the control box. Three external relays - two ECU Relays and the Start Relay are also mounted inside the control box near the microprocessor. Another Relay - the Preheat Relay, is located in the Engine Compartment.

This system automatically controls generator operation by providing:

  • Automatic unit preheat and engine startup during initial startup or delayed restart

  • Automatic Pretrip Test capability

  • Delayed alternator excitation for 2 minutes

  • Unit shutdown protection for the engine and alternator. The controller stops the unit due to low engine oil pressure, low engine oil level, high coolant temperature, or alternator overload.

  • Automatic unit restart 20 minutes after unit shutdown due to an unknown condition, high engine water temperature, engine failure to start, check fuel alarm, or alternator overload (also low engine oil pressure if enabled). It will attempt one (1) restart and then stop.

    SG+ Controller Display

Parent topic: SG+ 1.5 Controller and Operating Instructions

Controller Overview

Miscellaneous Controller Features

  • Internal self-checking/diagnostic capability

  • Pretrip test capability

  • Hourmeter: The controller has a built-in run hourmeter that can be accessed through the Timers/Counters Submenu under the Misc. Functions Menu.

  • The application software version is displayed by selecting the Program Version Submenu under the Misc. Functions Menu.

  • Display menus: The SG+ controller contains extensive display menus that can be navigated via the keypad. The display menus are organized into seven Main Menus: Data Menu, Alarm List Menu, Warning List Menu, Commands Menu, Misc. Functions Menu, Configuration Menu, and Event Log Menu.

Microprocessor Inputs:

  • Alternator Voltage

  • Battery Voltage

  • Coolant Level Sensor

  • Fuel Sender (Optional)

Microprocessor Outputs:

  • Start Relay

  • On Light

  • Alarm Light

  • Quad Relay