MEC 20 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM047 Rev 13 05/03/30
27
Thomson Technology
alarm signal as programmed by the user. The engine temperature analog input
provides the following control functions:
4.4.4.1.
LOW ENGINE TEMPERATURE ALARM
The low engine temperature alarm fault circuit is activated when the
engine temperature drops below a pre-determined setpoint for a specified
time delay. The low engine temperature alarm fault is programmable for
temperature setpoint level, transient time delay settings and other
functions. Refer to the programming instructions for further information.
4.4.4.2.
HIGH ENGINE TEMPERATURE #1 ALARM
The high engine temperature alarm fault circuit is activated when the
engine temperature rises above a pre-determined setpoint for a specified
time delay. The high engine temperature alarm fault is programmable for
the level of temperature setpoint, transient time delay settings and other
functions. Refer to the programming instructions for further information.
4.4.4.3.
HIGH ENGINE TEMPERATURE #2 SHUTDOWN
The high engine temperature shutdown fault circuit is activated when the
engine temperature rises above a pre-determined setpoint for a specified
time delay. The high engine temperature shutdown fault is programmable
for the level of temperature setpoint, transient time delay settings and
other functions.
Note:
If the engine temperature exceeds 170 degrees
Celsius as monitored by the analog input, the engine will shutdown
regardless of setpoint. Refer to the programming instructions for further
information.
Note:
High Engine Temperature shutdown may alternately be
programmed and wired as a digital fault input contact. Refer to
Section 4.3
for further details.
4.4.5. ENGINE OIL PRESSURE ANALOG INPUT
The MEC 20’s engine oil pressure sensor measures a DC analog signal from an
engine mounted sender. The MEC 20 software provides calibration for oil
pressure to coordinate with the engine mounted sender and control logic to
detect a wiring or sender failure (i.e. open or shorted signal). In case of a sender
or wiring failure, the MEC 20 will display zero or 9999 PSI and will initiate an
Summary of Contents for MEC 20
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