3.13 Digital outputs
Category Specifications
Controller terminals 3, 4, 5, 6, 7, 8, 9
Number of outputs 7
Type DC outputs
Maximum current rating
5 A (3 and 4)
1 A (5, 6, 7, 8, 9)
Software configurable options
Start relay, Fuel relay, Close genset contactor, close mains contactor, Stop
solenoid and many more (see Controller overview, Configurable
parameters in the User manual for more details).
NOTE • Do not connect the Starter motor relay and the Stop solenoid directly to the controller's output terminals. It is
recommended to connect terminals 3 and 4 to Start and Stop.
• Genset and mains contactor latching relays should be compiled against 4 kVA surge as per IEC-61000-4-5 standard.
3.14 Actuator outputs (SGC 421 only)
Category
Specifications
Controller terminal 17, 18. 19 and 20
Type Stepper motor drive
Max. current 800 mA
The actuator outputs are used only for the Rotary actuator, if installed. The Rotary actuator is a 4-wire actuator that is used for
creating an electronic governing application in case of a mechanical fuel system engine. In diesel engines, the Rotary actuator's
shaft output gets mechanically connected to the stop lever or the throttle lever of an in-line or rotary fuel injection pump. In case of
petrol or natural gas engines, the Rotary actuator's shaft output gets connected to the throttle/charge control valve.
It is recommended to follow the connection details of the Rotary actuator connector and SGC 121.
3.15 D+ Charger alternator
Category
Specifications
Controller terminal 10
Voltage range
0 to V
BATT
V
BATT
= 8 to 32 V DC
Excitation PWM (power limited to 3 W, 12 V/250 mA, 24 V/125 mA)
Accuracy ±2 % of full scale
The charge fail is a combined input and output terminal. When the genset starts, the terminal provides controlled power output to
excite the charging alternator. After the excitation is successfully done, the controller reads the charging alternator's output voltage
for monitoring its health. The action for charge fail is configurable.
USER MANUAL 4189341227A UK Page 13 of 86
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