EMS EMS372 User manual

EMS372
GCU/3AS
Genset Controller
User Manual
This document applies to:
9001-0104
Build version
3600-0168
Firmware Version
5000-0046 (V3.G.3D)
Version History:
S. No.
Version No.
Changes Made
Date Modified
Modified By
Approved By
1
2
3
www.ems.gen.nz
The information contained in this document is copyright, and
shall not be reproduced without the written authority of EMS
©2008

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Contents
1. Introduction ...............................................................................................................................4
2. Benefits .....................................................................................................................................4
3. Physical Form .............................................................................................................................5
4. Functions ...................................................................................................................................6
4.1 System...............................................................................................................................6
4.2 Engine Monitoring...............................................................................................................6
4.3 Generator AC Monitoring.....................................................................................................7
4.4 Mains AC Monitoring...........................................................................................................8
4.5 System LED Indications ........................................................................................................8
4.6 System LCD Displays ............................................................................................................8
4.7 Engine LCD Displays.............................................................................................................8
4.8 Genset LCD Displays ............................................................................................................9
4.9 Mains AC LCD Displays.........................................................................................................9
4.10 AC Inputs............................................................................................................................9
4.11 Analog Inputs......................................................................................................................9
4.12 Digital Inputs ....................................................................................................................10
4.13 Special Inputs ...................................................................................................................10
4.14 Digital Outputs..................................................................................................................10
5. Operation ................................................................................................................................11
5.1 Buttons ............................................................................................................................11
5.2 LEDs ................................................................................................................................11
5.3 Password Access ...............................................................................................................12
5.4 Initial Power Up ................................................................................................................12
5.4.1 Ready...........................................................................................................................12
5.4.2 Mode Selection .............................................................................................................12
5.5 Manual Operation.............................................................................................................12
5.5.1 To start the genset.........................................................................................................12
5.5.2 To stop the genset .........................................................................................................13
6. Automatic Operation.................................................................................................................14
7. Display Operation .....................................................................................................................15
7.1 When the genset is ready...................................................................................................15
7.2 When the genset is running................................................................................................15
8. Alarms and Warnings ................................................................................................................17
8.1 Inputs Electrical Specification .............................................................................................20
8.2 Outputs Electrical Specification...........................................................................................22
9. Load Transfer and Contactor Operation.......................................................................................22
9.1 Battery Charging Alternator Excitation.................................................................................23
9.2 Battery Voltage Monitoring and Charging Detection..............................................................23
10. Set-up .................................................................................................................................24
10.1 Navigating in the setup menu .............................................................................................24
10.2 System Column .................................................................................................................25
10.3 Engine Column..................................................................................................................25
10.4 Timers Column..................................................................................................................29
10.5 Contactor A Column ..........................................................................................................30
10.6 Start/Stop Column.............................................................................................................30
10.7 AC Setup Column ..............................................................................................................31
10.8 AMF Setup Column............................................................................................................31
10.9 AGF Setup Column ............................................................................................................32
10.10 I/O Setup Column..............................................................................................................33

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10.11 Comms (Communications) Setup Column.............................................................................33
11. Communications...................................................................................................................34
11.1 Unit General Specifications.................................................................................................34
12. Installation and Wiring ..........................................................................................................36
12.1 Connector Detail ...............................................................................................................37
13. Trouble shooting ..................................................................................................................38
14. Wiring Options .....................................................................................................................41
15. Engine Sensor Tables.............................................................................................................42

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EMS372
Genset Controller
1. Introduction
The EMS372 is a custom designed controller gensets sold in the private market segment.
The unit incorporates both manual ,autostart and AMF(Automatic Mains Failure) initiated start
and stop sequencing, monitors engine and alternator operating parameters and provides both
engine and alternator protection, in a single integrated package.
The genset operating parameters are shown by scrolling screens on a backlit 16 Character by 2
line LCD. Alarms and warning are also shown on the LCD and supplemented by an alarm LED
and Hooter output. The unit has provided Passwords for security purposes.
The unit provides comprehensive monitoring of the engine and generator operating
parameters and provides automatic shutdown of the set in the event of damaging conditions.
In addition to the usual engine safety protections the unit monitors water level, fuel level,
engine temperature, canopy temperature, oil pressure its supports perheat and generator
loading to provide even more comprehensive protection.
The unit incorporates an Event Log (20 events)and a Stop Alarm Log (40 events) to give the
field service engineer the operational history and alarm history for easier diagnostics.
In the factory environment, the unit is configured by cloning through a PC system. Field
specific parameters can be adjusted by using the front panel buttons and an inbuilt menu
system.
2. Benefits
Reduces system cost:
oIntegrates engine gauges and AC metering into one unit.
oMinimises control panel wiring offering reduced material and labour costs.
Reduces warranty costs by providing comprehensive engine and generator protection
and a maintenance due timer.
Flexible, the unit can be customised by PC cloning for individual genset model
characteristics and fitments.
Includes communications port for remote monitoring applications or dual station
operation.

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3. Physical Form
Front View
Back View

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4. Functions
4.1 System
Function
Description
Protection Shutdown
Automatic preventative engine and genset shutdown in the event
of abnormal operating conditions with optional configuration
parameters and clear LCD status messages
Manual Start
In response to the front panel pushbutton performs a fully
sequenced engine start with optional configuration parameters and
clear LCD status messages
Manual Stop
In response to the front panel pushbutton performs a fully
sequenced engine stop with optional configuration parameters and
clear LCD status messages
Auto Start
In response to a digital input performs a fully sequenced engine
start with optional configuration parameters and clear LCD status
messages
Auto Stop
In response to a digital input performs a fully sequenced engine
cool down then stop with optional configuration parameters and
clear LCD status messages
AMF Start
In response to a mains failure event performs a fully sequenced
engine start with optional configuration parameters and clear LCD
status messages
AMF Stop
In response to a mains restored event performs a fully sequenced
engine stop with optional configuration parameters and clear LCD
status messages
Manual Transfer Control
Manually initiated and automatically sequenced A and B contactor
control with optional configuration parameters and clear LCD status
messages
Emergency Stop
In response to a digital input performs a fully sequenced engine
stop with optional configuration parameters and clear LCD status
messages
Automatic Transfer Control
Automatically initiated and sequenced A and B contactor control
with optional configuration parameters and clear LCD status
messages
4.2 Engine Monitoring
Function
Description
Lubrication Oil Pressure
Monitors engine oil pressure with optional configuration
parameters and clear LCD status messages this ensures the oil

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pressure remains within configured limits. Exceeding these limits
will result in automatic engine shutdown to prevent damage.
Oil Temperature
Monitors engine oil temperature with optional configuration
parameters and clear LCD status messages this ensures the engine
temperature remains within configured limits. Exceeding these
limits will result in automatic engine shutdown to prevent damage.
Engine Temperature
Monitors engine temperature with optional configuration
parameters and clear LCD status messages this ensures the engine
temperature remains within configured limits. Exceeding these
limits will result in automatic engine shutdown to prevent damage.
Battery Voltage
Monitors engine battery voltage with optional configuration
parameters and clear LCD status messages this ensures the battery
voltage remains within configured limits.
Battery Charging
Monitors engine battery charging status and clear LCD status
messages this ensures the battery is charged when the engine is
running.
Radiator Water Level
Monitors engine radiator water minimum level with clear LCD
status messages this ensures the radiator water level remains
sufficient. Low water will result in automatic engine shutdown to
prevent damage.
Fuel Level
Monitors engine fuel level with clear LCD status messages. Low
fuel level will result in automatic engine shutdown to prevent
damage.
Canopy Temperature
Monitors engine canopy temperature with optional configuration
parameters and clear LCD status messages this ensures the engine
canopy temperature remains within configured limits. Exceeding
these limits will result in automatic engine shutdown to prevent
damage.
Running Hours
Records engine run hours with clear LCD status messages.
4.3 Generator AC Monitoring
Function
Description
AC Phase Voltage
Monitors 1, 2 or 3 phases of AC voltage with optional configuration
parameters and clear LCD status messages.
AC Phase Current
Monitors 1, 2 or 3 phases of AC current with optional configuration
parameters and clear LCD status messages.
Uses externally uses shunts.
AC Phase Frequency
Monitors 1, 2 or 3 phases of AC Frequency with optional

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configuration parameters and clear LCD status messages.
AC Phase Reversal
Monitors Genset AC for Phase reversal with optional configuration
parameters and clear LCD status messages.
AC Loading
Monitors AC load as a percentage of full load with optional
configuration parameters and clear LCD status messages.
AC Power Metering
Monitors AC power output (KW, KVA, KVAR, KWH) with optional
configuration parameters and clear LCD status messages.
4.4 Mains AC Monitoring
Function
Description
AC Phase Voltage
Monitors 1, 2 or 3 phases of AC voltage with optional configuration
parameters and clear LCD status messages
AC Phase Frequency
Monitors 1, 2 or 3 phases of AC frequency with optional
configuration parameters and clear LCD status messages
AC Phase Reversal
Monitors Mains AC for Phase reversal with optional configuration
parameters and clear LCD status messages
Automatic Mains Failure
(AMF)
Monitors AC failure with optional configuration parameters and
clear LCD status messages
4.5 System LED Indications
Function
Description
Alarm
Red LED indication of system alarm.
4.6 System LCD Displays
Function
Description
Setup menu
System configuration menus
Start Up
Clear step-by-step start up sequencing messages
Shutdown
Clear step-by-step shutdown sequencing messages
Transfer
Clear step-by-step load transfer messages
4.7 Engine LCD Displays
Function
Description
Low oil pressure
Engine oil pressure low

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High oil temperature
Engine oil temperature high
High engine temperature
Engine temperature high
Low coolant level
Radiator water level low
Low fuel level
Engine fuel level low
High canopy temperature
Engine canopy temperature high
Engine Hours
Total Engine Hours Total Engine Starts
4.8 Genset LCD Displays
Function
Description
Phase Voltages
Phase 1, 2 and 3 Voltages
Phase Currents
Phase 1,2 and 3 Currents
Phase Frequencies
Phase 1,2 and 3 Frequencies
Phase Reversal
Phase 1,2 or 3 Reversed
AC Power Metering
Monitors AC power output (KW, KVA, KVAR, PF. KWH) with optional
configuration parameters and clear LCD status messages.
Overload
Genset overloaded
4.9 Mains AC LCD Displays
Function
Description
Phase Voltages
Phase 1, 2 and 3 Voltages and L1-L2, L2-L3, L3-L1
Phase Frequencies
Phase 1, 2 and 3 Frequencies
4.10 AC Inputs
Function
Description
3 Phase Genset AC Voltage
Genset AC voltages.
3 Phase Genset Current
Genset AC currents via external shunts.
3 Phase Mains AC Voltage
Mains AC voltages.
4.11 Analog Inputs
Function
Description

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Lubrication Oil Pressure
Engine oil pressure.
Engine Temperature
Engine coolant temperature (Air or Water).
Radiator Water Level
Engine radiator water level.
Fuel Level
Engine fuel level.
Oil Temperature
Engine oil Temperature
Canopy Temperature
Engine canopy temperature.
4.12 Digital Inputs
Function
Description
Auto Start / Stop Input
Auto start.
Emergency Stop Input
Emergency engine stop.
Oil Switch Input
Oil Pressure Switch sensor.
User Input
User Defined Input.
4.13 Special Inputs
Function
Description
Battery Voltage
Internal measurement of incoming DC supply.
Excitation Voltage
Internal measurement of battery charging alternator excitation
voltage.
Low Water Level
Oscillating, AC coupled, Zero net current flow.
4.14 Digital Outputs
Function
Description
Excitation Output
Alternator excitation control and feedback.
Fuel Output
Open drain fuel solenoid control.
Crank Output
Open drain engine crank control.
Configurable OP2
Configurable from the menu item
Refer to section of Setup items for available options
Configurable OP3
Configurable OP1

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5. Operation
Front Layout
5.1 Buttons
Button
Function Description
Start button / Menu Previous
Used to initiate generator start sequence
Used as system menu previous or value down button
Stop button / Menu Next
Used to initiate generator stop sequence
Used as system menu next or value up button
Up button / Menu Up
Used as system menu scroll up button
Down button / Menu Down
Used as system menu scroll down button
5.2 LEDs
Button
Function Description
Alarm
Alarm
Indicates system alarm

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5.3 Password Access
The unit requires a password before allowing the user to access Setup Menu items.
There are different passwords for Installation, Servicing and Factory level.
5.4 Initial Power Up
On power up, the unit displays Logo.
The unit then displays the Serial number, Application Code and Firmware version.
After the initialisation process is complete, the unit waits for a Start request (Start Button
or Auto Start Input), during which time it will display ‘READY’.
5.4.1 Ready
When the unit is in READY all measuring systems and display systems are turned on. The
unit remains on for 1 minute and if the genset is not started in that time the unit goes into
sleep mode to conserve battery power. In this mode the unit wakes periodically to check
for any unusual conditions and if it finds none it goes back to sleep, otherwise it alarms
accordingly.
Any activity on the buttons immediately wakes the unit and the appropriate action is
taken.
Pressing the STOP button while the unit is asleep immediately wakes the unit and scrolls all
engine and generator parameter screens. This allows reading of battery voltage, fuel level,
and run hours KWH etc.
5.4.2 Mode Selection
When the unit is in READY the user can select one of 3 modes can be selected by pressing
the UP button
Manual : Only the Front panel Start and stop buttons can start and stop the engine
oThe Auto Start input is ignored
Auto: Only the Auto Start input can start the Engine
oThe Manual Start and Stop buttons are ignored
Test : Then engine is started simular to Manual mode but the contactors are not
changed
In any mode the engine can be stopped with the Stop button.
5.5 Manual Operation
5.5.1 To start the genset
When the display is showing READY, press the start button momentarily to start the
genset. The READY state implies the engine and generator parameters are as expected for
a stationary genset. If the conditions are not as expected, an appropriate warning or alarm
is displayed on the LCD. The warning or alarm condition must be cleared before the genset
can be started.
The unit will perform the starting sequence as follows:
PREHEAT

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oIf PREHEAT is selected then the PREHEAT Output will activate for the time
specified
FUEL-ON.
oIf ETR (Energise To Run) fuel control is configured, the unit will control the fuel
output and display FUEL ON and the proceeds to the CRANK state.
oFor ETS (Energise To Stop) the sequence does not activate the output but
proceeds immediately to the CRANK state.
CRANK.
oThe crank output is activated and the display shows ‘Cranking’ with a count
down time.
oThe crank output is deactivated when the unit has detected a speed signal
above the crank disconnect speed specified in the settings, or has detected oil
pressure above the minimum oil pressure specified in the settings or Excitation
is present
oIf the genset does not start, the LCD will show ‘Stopping’, control the Fuel and
Crank outputs accordingly, and return to READY. No retries are done.
oIf the unit looses power due to battery voltage drop during cranking, and the
engine fires, then on regaining adequate battery voltage, the unit will continue
to allow the engine to run.
RUN UP.
oWhen the engine starts, the display shows ‘Run Up’ with a count down in
seconds. This allows the engine measurement system to stabilise. Over speed
and loss of speed signal are the only parameters checked during Run Up.
WARM UP
oAllows the engine to stabilise at full speed before going on load. Oil pressure
and Over-speed are monitored. The display shows ‘Warm Up’ with a
countdown time.
RUNNING
oThe display shows ‘RUNNING’. Operating parameters are scrolled onto the
display.
5.5.2 To stop the genset
Push the stop button briefly.
The unit will perform a stopping sequence as follows:
STOPPING
oThe display will show ‘Stopping’ with a countdown time.
oIf ETR fuel control has been selected the Fuel output will be de-energised.

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oIf ETS fuel control has been selected then the Fuel output will be energised for
the Max Fuel Time or until the engine stops. The stopping process will retry if
the engine fails to stop the first time. During the ‘ETS Rest period’ the Fuel
output is deactivated.
oThe fuel output is controlled until the engine stops rotating and oil pressure
decays. If the Oil Pressure has not decayed by the end of the ‘Max Fuel Time’,
the fuel output is deactivated and the controller waits until the oil pressure has
decayed, or for the remainder of the ‘Stop Time’. The speed must remain at
zero and the oil pressure must be below the alarm set point for the ‘Stop Rest
Time’ before the engine is considered stopped.
oIf the genset does not stop then the alarm output is activated and ‘STOP FAIL’ is
displayed on the LCD.
READY
oThe engine has stopped and is ready to start again as required.
6. Automatic Operation
If the Autostart input is activated, the unit will initiate an Autostart sequence. The
sequence is similar to the manual start and stop sequences above with the following
additions.
An adjustable Start Delay follows the Autostart input activation. This is usually
configured to avoid nuisance starting. The Display shows “Starting” with a
countdown value. For long start delays, the start time units may be set to minutes.
If the autostart restores for more than the Start Restore time, then the start
sequence is aborted.
The unit cranks the engine for the crank time or until the engine fires. If the engine
does not fire after the crank time, then the unit will repeat the crank procedure
after waiting for the crank rest time. This cycle is repeated for the “Crank Retries”
and if the engine has not started after the last cycle, a “Fail to Start” alarm is
generated.
The Start sequence now follows the manual starting sequence until the engine is
running.
During an Autostart run the LCD displays Auto in the top left of the display.
The stopping sequence is initiated by deactivation of the autostart input. The engine does
not stop immediately as there are three additional states in the Auto stopping sequence.
“Run On” follows “Running” and is a provided as an adjustable delay to reduce
nuisance stopping. The Contactor A & B Outputs remain activated and the Display
shows “Run On” with a countdown value. If the autostart input is re-activated
during “Run On” the unit returns to normal “Running” until the Autostart input is
deactivated.

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“Cool Down” follows “Run On” and allows the engine and/or generator to cool
down before stopping. The cool time is adjustable. At the start of “Cool Down” the
Contactor A & B Outputs are deactivated, transferring the load to the mains. The
display shows “Cool Down” with a countdown. If the autostart input is re-activated
during “Run On” the unit returns to normal “Running” and Contactor A and B are
activated.
Pressing the Stop button in auto mode stops the engine immediately, deactivates the
Contactor A & B Outputs, and changes the mode of the unit to Manual.
7. Display Operation
7.1 When the genset is ready
READY
7.2 When the genset is running
When the genset is starting and stopping, the display shows the state of the sequence
together with the time remaining before the next state will commence.
Once the genset is fully running or if the genset is stopped and in ‘READY’, the running
parameters are displayed. This includes generator and engine parameters simultaneously
on separate displays. The unit sequentially scrolls through screens as shown below:
Manual Running
5.51B OS OK
R1500 67C 13.6V
CT 40C FL 55%
H 00000.1 13.5Vm
Manual Running
Oil Temp 40 C

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Mains 50.0Hz
233 232 233
ML1-2 L2-3 L3-1
401 400 400
GV1 V2 V3
232 233 231
GL1-2 L2-3 L3-1
401 400 400
GI1 GI2 GI3
10.5 10.6 10.4
Manual Gen Freq
50.0 Hz
KW1 KW2 KW3
+10.2 +10.1 +10.3
Manual Total
+ 10.0 KW
Manual P.F.
+1.000

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Manual Gen KWHr
100
Manual Contact
A --/-- XXXX --=-- B
Then Returns to the first screen
If warnings are present, the associated messages are included in the scroll list, and are interleaved
with each status display. A typical Warning will display is as follows:
WARNING
Charging Fault
OR
ALARM
Gen Overload
8. Alarms and Warnings
In the event of abnormal operating conditions the unit will issue a warning or an alarm and
shut the genset down as required. The LCD shows an appropriate message indicating the
nature of the condition. To draw operator attention to the condition the flashing general
alarm LED is used.
In most cases, Warnings do not stop the genset and are self-resetting. Alarms will normally
stop the genset and require the operator to clear the alarm by pressing the Stop or Accept
button. The genset cannot be started if an alarm exists.
Warnings are indicated by slow flashing of the alarm LED and displaying the appropriate
message on the LCD as follows.
Message
Function description
Oil Pressure Low
The oil pressure is below the warning setpoint
Engine Temp High
The engine temperature is above the warning setpoint
Canopy Temp High
The canopy temperature is above the warning setpoint
Low Fuel
The Fuel Level is below the warning setpoint
Battery Volts Low
The battery volts are below the warning setpoint
Battery Volts High
The battery volts are above the warning setpoint
Battery Charge Fail
The battery is not being charged correctly
Auto Start On
The Autostart input is active when the unit is not in auto mode
Maintenance
Engine maintenance is due. The engine has run for longer than the
maintenance time. A message is also displayed every 5 seconds on the

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LCD. Once the maintenance timer has expired, pressing the button
for 30 seconds will reset it.
Minus Current Lx
Minus current indicates that the current measured on Lx (x being 1,2 or
3) is reversed. This is probably due to reversed CT wiring or importing
power.
Overload Active
The overload output is active.
Alarms are indicated by fast flashing of the alarm LED and displaying the appropriate message on
the LCD.
Message
Function description
Oil Pressure Low
The oil pressure went below the alarm setpoint while running.
Check oil level and replenish. Check for blocked oil filter.
Engine Oil Temp High
The engine oil temperature went above the alarm setpoint while the
engine was running.
Check for over loading. Check cooling air flows, Check coolant level.
Engine Temp High
The engine temperature went above the alarm setpoint while the
engine was running.
Check for over loading. Check cooling air flows, Check coolant level.
Canopy Temp High
The Canopy Temperature went above the alarm setpoint.
Check cooling air flows. Check for overloading.
Fuel Level Low
The Fuel Level is below the alarm setpoint.
The engine is stopped to prevent air and dirt infiltration to the engine.
Replenish the fuel.
Battery Voltage High
The battery voltage went above the setpoint.
High battery voltage usually indicates that the battery charging
alternator has failed and it is producing a voltage which might damage
the battery, control relays or the controller.
Engine shutdown is recommended to minimise the risk of damage and
fire.
Hirev Alarm
The speed signal indicates the engine is grossly over speed.
Check Governor system.
Coolant Level Low
The radiator water level is below the required level.
The water level needs topping up.
Start Fail
The engine has failed to start.
Check Fuel supply, check battery condition, check air filters.

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Stop Fail
The engine has failed to stop.
Check stop solenoid, check rack operation.
Oil-P Fault
The Oil Pressure sensor system is not functioning as expected.
Check oil pressure sensor and associated wiring.
Eng-T Fault
The Engine Temperature Sensor is not functioning as expected.
Check engine temperature sensor and associated wiring.
Can-T Fault
The Canopy Temperature Sensor is not functioning as expected.
Check the canopy temperature sensor and associated wiring.
Fuel-L Fault
The Fuel Level Sensor is not functioning as expected.
Check the Fuel Level Sensor and associated wiring.
Oil Detected
Oil Pressure is unexpectedly present.
Check the Oil Pressure Sensors and associated wiring.
Check the Oil filter system is not blocked.
Check the engine is not running with a failed speed sensing system.
E-S Lock-out
The emergency stop input has been activated. Deactivate the
emergency stop input, then press the stop button to clear this alarm.
A-S Lock-out
If the Stop button is pressed while running, it is considered an
emergency stop and the unit will stop the engine and enter the
Autostart Lockout state. This prevents the engine from starting again,
while the Autostart input remains activated.
The Autostart Lockout state is self resetting upon deactivation of the
Autostart input.
If the engine was stopped for a real emergency, then the emergency
stop switch should also be activated to ensure the engine will not start
inadvertently.
If the unit is in the Autostart Lockout state, the engine can be restarted
by pressing the Start button. This is not considered a manual start but
rather a release from the Autostart Lockout condition. The contactors
will be controlled in the appropriate way.
Phase Reversal
The generator has a phase reversal or the wiring is incorrect
Low V1 Volts
Voltage on genset Phase V1 is Low
Low V2 Volts
Voltage on genset Phase V2 is Low
Low V3 Volts
Voltage on genset Phase V3 is Low
High V1 Volts
Voltage on genset Phase V1 is High
High V2 Volts
Voltage on genset Phase V2 is High

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High V3 Volts
Voltage on genset Phase V3 is High
High Frequency
Genset frequency is high
Low Frequency
Genset frequency is low
Alarms are indicated by fast flashing of the alarm LED and displaying the appropriate message on
the LCD.
AGF(Automatic Genset Failure)
When the Con B is closed meanwhile the Mains get stable, it checks Mains and opens the Con B in
order to protect the load....
Message
Function description
AGF Phase Reversal
The generator has a phase reversal or the wiring is incorrect
AGF Loss V1 Volts
Voltage on Alternator Phase V1 was lost
AGF Loss V2 Volts
Voltage on Alternator Phase V2 was lost
AGF Loss V3 Volts
Voltage on Alternator Phase V3 was lost
AGF Low V1 Volts
Voltage on Alternator Phase V1 is Low
AGF Low V2 Volts
Voltage on Alternator Phase V2 is Low
AGF Low V3 Volts
Voltage on Alternator Phase V3 is Low
AGF High V1 Volts
Voltage on Alternator Phase V1 is High
AGF High V2 Volts
Voltage on Alternator Phase V2 is High
AGF High V3 Volts
Voltage on Alternator Phase V3 is High
AGF High Frequency
Alternator frequency is high
AGF Low Frequency
Alternator frequency is low
8.1 Inputs Electrical Specification
Input
Type
Comment
Battery + Volts
Power
Nominal 12VDC or 24VDC or Station Battery Supply
Max 6-36VDC
0V Common
Power
0VDC, Common
Fuel Level Sensor
Analog/Digital
Suitable for either resistive or switch C.O.F senders
Current limited exciting voltage 10V at 10mA approx
Engine Oil
Temperature
Analog/Digital
Suitable for either resistive or switch C.O.F. senders