Manual 26174 EGCP-2 Engine Generator Control Package
Woodward 33
Coolant Temperature and Oil Pressure Inputs
The EGCP-2 has one analog input dedicated to sense engine coolant
temperature and one analog input dedicated to sense engine oil pressure. These
inputs can be utilized for monitoring, alarm, and shutdown. Configurable alarm
set points are provided for both a high and low alarms. Either one or both of
these inputs can also be disabled if they are not to be used, by setting the related
alarm set point to “Disabled.”
The inputs are designed to accept one of three types of signals: 4-20 mA, 1-5 V,
or a passive resistive sensor. DIP switches on the control circuit board need to
be configured for the type of sensor being used (see Figures 3-14 and 3-15).
Once the sensor type is selected and the DIP switches are set, the inputs should
be calibrated for proper monitoring. Each input has an associated Gain and
Offset setting in the Calibration menu. The controls are calibrated at the factory
for a
4–20 mA sensor type that represents a 0–75 psi pressure signal and a 0–300
°F temperature signal. If a different range 4–20 mA, 1–5 V, or passive resistive
sensor is used, the Gain and Offset values will need to be adjusted.
R
R
SW1-4
C
R
SW1-3
537.5
100 100
68
+12 Vdc
Oil Pressure
Sensor
Input
69
SW1-1
SW 1-2
249
+
-
X - May be closed to insert shunt
resistors required to make certain 0-200
ohm sensors more linear.
Input 4-20mA 1-5 Volt 200 Ohm
Sensor
SW1-1 Open Open Closed
SW1-2 Closed Open X
SW1-3 Open Open X
SW1-4 Open Open X
VIS-050a
00-08-24
Figure 3-14. Wiring Diagram for Pressure Inputs
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