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1. Introduction
1.1
About
The SGC 420 Mk II controller has all the functions needed to protect and control a genset, a genset breaker, and a mains
breaker. The values and alarms are shown on the LCD display screen, and operators can easily control the system from the
display.
You can use the SGC 420 Mk II to monitor the site battery and significantly reduce your fuel consumption. The controller
can also monitor shelter temperature, engine and alternator parameters, and the true RMS voltage and current.
Use the Smart Connect Mk II software to configure parameters, log data, add custom sensor curves, and supervise live
data. M-Logic is also available from the software, which allows you to create functions using pre-defined events and
outputs. The analogue comparator can be used to create custom alarms and logic functions.
1.1.1
Function overview
This is an overview of the most important functions.
Monitoring
Use the SGC controller to monitor the site battery and the shelter temperature. The controller can also monitor the mains,
and engine and alternator parameters.
Inputs and outputs
• Configurable analogue inputs
• Differential input for site battery voltage
• Digital switch inputs
• DG alternator input
• Mains voltage input (AMF)
• Input for fuel reference selection
• Digital outputs
Communication
• RS-485 for Modbus communication
• CAN bus engine communication
• USB interface to PC
Operation modes
The SGC controller can operate in AUTO mode, manual mode, and test mode.
In AUTO mode, you can select these functions:
• Island
• Site battery monitoring
• Automatic mains failure (AMF)
• Cyclic mode
• Remote start/stop
• Auto exercise
• Engine drive
Display and language functions
• Backlit display
• Supports many languages, including English, Spanish, and Chinese
User manual 4189341360A EN
Page 5 of 99
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