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1. Introduction
1.1
About
The SGC 121 controller contains all the functions needed to protect and control the genset, the genset contactor, and also a
mains contactor. All the values and alarms are shown on the LCD display screen. Operators can control the system from the
display.
The SGC 121 has an electronic governing for engines with mechanical fuel systems. With a rotary actuator as add-on for air
or fuel charge control, the controller can do electronic governing of the engine within ISO 8528 class G3 limits.
You can use the DEIF Smart connect software to configure the inputs and outputs. You can also configure the parameters
on the controller.
1.2
Function overview
This is an overview of the most important functions.
Monitoring
Use the SGC controller to monitor mains, engine and alternator parameters.
Inputs and outputs
• Analogue current/voltage inputs
• Analogue resistive inputs
• Digital switch input
• DG alternator input
• Mains voltage input (AMF)
• Input for fuel reference selection
• Digital outputs
• Analogue input for the E-governor
• E-governor actuator output
Communication
• RS-485 for Modbus communication
• USB interface to PC
Modes of operation
The SGC controller can operate in AUTO mode and manual mode.
In AUTO mode, you can select these functions:
• Island
• Automatic mains failure (AMF)
• Remote start/stop
• Auto exercise
• Engine drive
Display and language functions
• Backlit display
• Supports many languages, including English, Spanish, and Chinese
• 2-level password protection
User manual 4189341354A EN
Page 4 of 72
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