DEIF SGC 120 Mk II Single Genset Controller

Name: DEIF SGC 120 Mk II Single Genset Controller – Datasheet & Quote
Brand: DEIF
SKU: SGC 120 Mk II

Compact controller for single gensets and engine drives

The DEIF SGC 120 Mk II is a small controller with the functions needed to protect and control a genset, a genset breaker and a mains breaker. It monitors engine safety parameters such as coolant temperature and oil pressure, measures generator and mains voltage and frequency, and shows values and alarms on a graphical LCD with Stop, Start and Auto keys. DEIF lists island operation, automatic mains failure (AMF), remote start and stop, auto exercise and engine drive as the modes of operation.

Configuration is done in the free Smart Connect Mk II software over USB. It allows parameter changes, data logging, custom sensor curves and the M-Logic logic tool, which builds functions from selectable input events and output events, with an analogue comparator for custom alarms. Any SGC controller can also act as a remote display for another SGC unit over CAN (J1939) using the RDC 100 software.

Technical specifications

Parameter	Specification
Manufacturer / series	DEIF, SGC Mk II (application software R18)
Supply	12/24 V DC nominal; operating range 8 to 28 V DC; reverse protection to -32 V DC
Current consumption	About 200 mA (excluding DC outputs); standby 124 mA at 12 V; deep sleep 20 mA
Genset voltage measurement	True RMS; 32 to 300 V AC phase-neutral, 32 to 520 V AC phase-phase; 5 to 75 Hz
Mains voltage measurement	True RMS; 32 to 300 V AC phase-neutral, 32 to 520 V AC phase-phase; 5 to 75 Hz
Genset current	-/5 A and -/1 A CT secondary; accuracy ±1.4 % of nominal; burden 0.25 VA
Digital inputs	5, negative switching
Analogue inputs	3 resistive 0-5000 Ω; 1 voltage/current 0-5 V DC or 4-20 mA
MPU / W-point input	10 Hz to 10 kHz; 200 mV to 45 V AC RMS
D+ charging alternator	PWM excitation, power limited to 3 W (12 V / 250 mA)
Digital outputs	6 DC outputs, 500 mA each, 1 A total
Communication	USB 2.0 type B; RS-485 Modbus (120 Ω termination built in); CAN 250 kbps
Operating temperature	-20 to +65 °C; storage -30 to +75 °C
Protection degree	IP65 front with supplied sealing gasket
Dimensions / cutout	139.0 x 114.0 x 38.3 mm; cutout 118.0 x 93.0 mm
Weight	276 g without lock; 289 g with lock
Approvals listed	CE; UL/cUL Recognized to UL/ULC6200:2019 1st edition

Protections and functions

Generator protections include two stages each of under and over voltage and frequency, unbalanced load, over-current (50TD), overload (32F), low load, reverse power and phase reversal. Engine protections include under and over speed, battery monitoring, charging alternator, pre-heat, coolant temperature, lube oil pressure, fuel level, fuel theft detection and ECU communication failure. Mains protections cover voltage, frequency and phase reversal. Mains functions include mains support (voltage and frequency), mains monitoring and an energy counter.

The genset functions include start and stop sequences, counters for running hours, starts, energy and maintenance, idle speed control, coolant temperature control and automatic fuel transfer.

Choosing the SGC model

Model	Supply range	Digital inputs	Analogue inputs	Dimensions (L x H x D)
SGC 120 Mk II (this page)	8 to 28 V DC	5	3 resistive + 1 V/mA	139.0 x 114.0 x 38.3 mm
SGC 420 Mk II	8 to 32 V DC	9	5 resistive + 2 V/mA	233.0 x 173.0 x 38.5 mm

Use the SGC 120 Mk II for small sets with simple I/O; use the SGC 420 Mk II when a larger display with breaker keys, earth-leakage current monitoring or site battery and shelter monitoring is required. Confirm the engine ECU protocol, the number of sensors and the intended mode before ordering.

Documents and quotation

The DEIF data sheet is attached. Send the model, quantity and engine data for a quotation. See Diesel Generator Spare Parts for further generator control products.

DEIF genset and power management controllers

DEIF describes itself as a supplier of power control solutions for decentralised power generation on land and at sea. Its genset controllers range from the compact SGC and CGC units to the AGC 150 and AGC-4 Mk II controllers, which add synchronisation and power management for plants with many gensets. DEIF data sheets state the supply range, I/O, protections and approvals of each controller.

Frequently Asked Questions