DynaGen GSC400 Series User Manual

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6.3 Speed Sensing
The speed sensing menu allows you to select the source to use for sensing the rotational
speed of the engine. There are three options to choose from:
1. J1939 Input – If the engine/generator comes equipped with an engine control
module (ECM) that supports the J1939 protocol then the GSC400 can obtain the
engine speed from the ECM.
2. Magnetic Pickup – If the engine/generator is equipped with a magnetic pickup
sensor then the sensor can be connected to the SPEED 1 and SPEED 2 spade
terminals on the GSC400.
3. Generator Output – The GSC400 can also determine the engine speed indirectly
from the generator frequency. The voltage source of the generator must be
connected to the SPEED 1 and SPEED 2 terminals.
Over-speed warnings and failures as well as under-speed warnings and failures can
be set from the menu in terms of RPM. The warnings and failures apply to all three
options above.
6.3.1 Rated Speed
For the magnetic pickup and generator output options you must select the rated
frequency and rated speed. The GSC400 uses these values together to calculate the
engine speed from the magnetic input or generator output.
The rated speed is the speed (in revolutions per minute, RPM) the engine runs at when
producing power. For example some generators run at 1800RPM while others run at
3600RPM.
The rated frequency is usually either 50Hz or 60Hz. It is the frequency of the generator
output when producing power. For a magnetic input the rated frequency is determined by
the number of teeth on the flywheel and is calculated by:
Rated frequency = (Number of teeth x Rated Speed) / 60
For the generator output option the rated frequency is normally the frequency of the
generator: 50Hz or 60Hz.

DynaGen GSC400 Series Specifications

General

Brand	DynaGen
Model	GSC400 Series
Category	Controller
Language	English