Mebay DC20D MK2 User manual

DC20D MK2
GENSET CONTROLLER
USER MANUAL

DC20D MK2 GENSET CONTROLLER USER MANUAL
1
Software Version
No.
Version
Date
Note
1
V1.0
2020-08-01
Original release.
2
V1.1
2019-03-01
1) Optimization of over current inverse time
function.
2) Add over-current fault delay function.
3
V1.2
2020-05-01
Add RS485 communication baud rate and CRC
check bit setting;
4
V1.3
2021-02-01
Name of unified input and output port.
5
V1.4
2021-06-01
Fix known errors in wiring diagram。.
Chongqing MEBAY Technology Co.,Ltd
Add: No6-2,Building 4, Gangan Rd, Jiangbei District, Chongqing.
Tel：[phone]
Fax：[phone]
Web：http://www.mebay.cn
http://www.cqmb.cn
E_mail：[email protected]

DC20D MK2 GENSET CONTROLLER USER MANUAL
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Symbol Description
Symbol
Description
Note
Remind operators to operate correctly, otherwise it may cause
the equipment not to work correctly.
Be care
It is indicated that potential hazards can damage equipment
without proper precautions.
Warning
It is indicated if appropriate preventive measures are not taken,
potentially dangerous situations may result in death, serious
personal injury or significant property losses.

DC20D MK2 GENSET CONTROLLER USER MANUAL
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Warning
1. The installation of this equipment must be carried out by professionals.
2. When installing and operating the controller, please read the entire instruction
manual first.
3. Any maintenance and commissioning of the equipment must be familiar with all the
equipment.
4. t, safety standards and precautions in advance, otherwise it may cause personal
injury or damage to related equipment.
5. The engine must have an overspeed protection device independent of the
controller system to avoid casualties or other damage caused by engine out of
control.
6. After the installation of the controller is completed, please verify that all protection
functions are valid.
Be Care
1. Please keep the good connection of the power supply of the controller. Do not
share the connection lines of the positive and negative electrodes of the battery
with the floating charger.
2. During the operation of the engine, do not disconnect the battery, otherwise it may
cause damage to the controller.

DC20D MK2 GENSET CONTROLLER USER MANUAL
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CATALOGUE
1. Summary............................................................................................................................... 5
2. Main Features...................................................................................................................... 5
3. Parameters Display............................................................................................................. 5
4. Protection.............................................................................................................................. 5
5. Parameters........................................................................................................................... 6
6. Overall Dimension and Wiring Diagram........................................................................... 7
7. Installation instruction....................................................................................................... 10
8. Panel and display.............................................................................................................. 11
9. Control and operation instruction.................................................................................... 12
10. Warnings and Shutdown Alarms.................................................................................. 14
11. Parameters setting.......................................................................................................... 18
12. Fault finding......................................................................................................................23
Notes:
1. All rights reserved. No part of this duplication may be reproduced in any material
form (including photocopying or storing in any medium by electronic means or others)
without the written permission of the copyright holder.
2. MEBAY Technology reserves the rights to change the contents of this document
without prior notice.

DC20D MK2 GENSET CONTROLLER USER MANUAL
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1. Summary
DC20D MK2 is one module used for Diesel/gasoline Generator, It's an
upgraded product of DC20D.It is with the functions of Auto Star/Stop, Protection and
Alarm indication. DC Power and Running situation is indicated on the front panel.
The status of the engine and generator can be checked conveniently because
these parameters of over speed, under speed, Over Frequency, Low Frequency,
Over Voltage, Under Voltage, Low Oil Pressure, High Temperature, Low Water Level,
Low Oil Level, Charge Failure, Over-time Stop, Emergency Stop Alarm System as
well as Low Battery Voltage can be indicated in time.
The output connector is connected with traditional relay which can burden more
output current. The parameters can also be set by the front face buttons so that it can
be used in different kinds of situations.
2. Main Features
Dual core 32bit high performance single chip microcomputer.
5 Units LED tube Display.
LED and Fault Alarm Code Indication.
Totally 4 relay’s output, among which 2 relay output can be self-configurable, each
relay can be set as max 6 functions.
It has two sensors and three switch inputs (input channels 2 and 3 can be
configured as sensors or switch inputs);
With RS485 communication port, can achieve “Three Remote” functions via
MODBUS protocol.
Various of crank conditions (RPM, Frequency, Oil Pressure) can be chosen.
Sensor can be self-defined by PC software.
Control Protection: Auto Start/Stop of genset, perfect failure display and protection.
Standard water-proof rubber gasket, The waterproof can reach IP54.
Module design: All the connections are adapted with European connectors so that
installation, connection, repair and replacement can be more easily.
3. Parameters Display
Engine RPM
Generator Frequency Hz
Generator Phase voltage L-N
Generator current A
Engine battery voltage
Running time
Accumulation time
Engine water temperature
Engine oil pressure
4. Protection
Emergency Stop
Over frequency stop
Under frequency stop
Over voltage stop
Under voltage stop
Over current stop

DC20D MK2 GENSET CONTROLLER USER MANUAL
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Low Oil Pressure Stop
High water temperature stop
Oil pressure sensor Open
Water temperature sensor Open
Start Failure
Stop Failure
Low Water level stop
Low Water level stop
High Oil temperature stop
RPM signal lost alarm
Over speed stop
Under speed stop
Low Fuel Level warning
Low Battery voltage warning
5. Parameters
Options
Parameters
Working voltage
DC8V----36V Continuous
Power consumption
Standby：24V：MAX 1W
Working：24V：MAX 3W
AC Voltage Input
1P2W 30VAC-276VAC (ph-N)
Rotate speed sensor
Frequency
30-9999Hz
MAX Accumulating Time
99999.9Hours（Min Store time:6min）
Fuel Relay Output
Max 5 Amp DC+VE Supply voltage
Start Relay Output
Max 5 Amp DC+VE Supply voltage
AUX. OUTPUT 1
Max 2.5 Amp DC+VE Supply voltage
AUX. OUTPUT 2
Max 2.5 Amp DC+VE Supply voltage
Excitation output
Max 1AMP DC+VE supply voltage
Switch value input
Available if connecting with Battery -
Working condition
-25-65℃
Storage condition
-40-85℃
Protection Level
IP54：when waterproof rubber gasket is added
between controller and its panel
Insulation strength
Apply AC1.5kV voltage between high voltage terminal
and low voltage terminal; The leakage current is not
more than 3mA within 1min.
Overall dimension
78mm*78mm*55mm
Panel cutout
67mm*67mm
Weight
0.3Kg

DC20D MK2 GENSET CONTROLLER USER MANUAL
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6. Overall Dimension and Wiring Diagram
Overall Dimension:

DC20D MK2 GENSET CONTROLLER USER MANUAL
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Descriptions of terminal connection
No.
Function
Description
Cable
cross
sectional
area
1
Battery Negative Input B-
Controller power supply input B-.
2.5mm2
2
Battery Negative Input B+
Controller power supply input B+.
2.5mm2
3
Fuel Output
+VE output, Max 5 Amp
1.5mm2
4
Crank Output
+VE output, Max 5 Amp.
1.5mm2
5
Aux. Output 1
+VE output, Max 2.5 Amp.
1.5mm2
6
Aux. Output 2
+VE output, Max 2.5 Amp.
1.5mm2
7
Charging excitation output
+VE output, Max 0.9 Amp.
1.0mm2
8
Aux. Input 1
Switch input,Connect to the negative side of
the active circuit.
1.0mm2
9
Generator Voltage L
Connect to generator set output L line
1.0mm2
10
Generator Voltage N
Connect to generator set output N line
1.0mm2
11
Load CT Secondary
Connected to the secondary of current
transformer, 0-5A input.
1.0mm2
12
Load CT Secondary
1.0mm2
13
Speed sensor -
Connect sensor input.Use a shielded wire to
connect the speed sensor.
1.0mm2
14
Speed sensor +
1.0mm2
15
Aux. Input 2
Switch input or sensor input (to be
configured)
16
Aux. Input 3
Switch input or sensor input (to be
configured)

DC20D MK2 GENSET CONTROLLER USER MANUAL
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DC20D MK2Typical Wiring Diagram
WL
CTs MUST BE 5 AMP SECONDARY
FROM GENERATOR
5
4
3
21
12
109
L
67
MODEL:DC20D MKII
-VE +VE
AUX. INPUT 1
8
11
15 16
N L COM
13 14
SCR
B+ B-
AUX. OUTPUT 1
GEN CURRENT
GEN VOLTS
SWITCH
FUSE 10 A
BATTERY
FUEL
CRANK
AUX. OUTPUT 2
ALT
BATTERY NEGATIVE MUST BE GROUNDED
AUX. INPUT 2 AUX. INPUT 3
P1 P2
S1 S2
L
N
RS485
MPU
FUSE 2A
TO LOAD
Note: Please don’t move battery during running status or it may cause the
controller broken!
WARNING: When generator is on-load, C. T. secondary must not be open
circuit, Otherwise, the high voltage generated will pose a danger to personal safety.

DC20D MK2 GENSET CONTROLLER USER MANUAL
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7. Installation instruction
The controller is fixed by four special fixing members and screws, and the screws
of the metal fasteners cannot be too tight.
Panel Cutout: W67mm*H67mm.
Note: If the controller is installed directly in the genset shell or other fluctuated
equipment, the rubber pad must be installed.
Battery Voltage Input
DC20D MK2 controller is suitable for 8-36V DC battery voltage. Battery negative
must be reliably connected to the enclosure of the engine. The controller power
supply B+ and B- must be connected to battery positive and negative, and the wire
size must not be less than 2.5mm2.
NOTE:
In case of floating charger connect charger output to battery positive and negative
directly, then, connect battery positive and negative poles to controller positive and
negative power supply.
Output and relay expansion
Note: All outputs of the controller are relay contacts. The maximum current
capacity is described in the "Parameters" in this manual. Please use it in the relay
current capacity. If an extended relay is needed, add a continuous current diode
(when the extended relay coil is DC) or a resistance-capacitance loop (when the
extended relay coil is AC) to both ends of the coil to prevent interference with the
controller or other equipment.
AC current input

DC20D MK2 GENSET CONTROLLER USER MANUAL
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Current transformer with rated secondary current 5A must be externally connected
to the controller current input.
WARNING: When generator is on-load, C. T. secondary must not be open
circuit, Otherwise, the high voltage generated will pose a danger to personal safety.
Withstanding voltage test
If withstanding voltage test is conducted after the controller has already been
installed onto the control panel, please unplug all controller terminal connections in
order to prevent high voltage from damaging it.
8. Panel and display
Key Function Description
KEYS
NAME
Main Function
Stop
Reset
Revert
Can stop generator under manual/auto mode;
Can reset shutdown alarm
During stop procession, pressing this key again can stop
generator immediately.
Pressing this key can cancel the setting and back to
upper class under edition.
Parameters to be saved under value checking page.
Manual
Pressing this key will set the module into manual mode.
Under display mode, parts of the page can move down.
Under edition mode, to move the digit or decrease the
numbers.
Auto
Pressing this key will set the module into auto mode.
Under display mode, parts of the page can move up.
Under edition mode, to move the digit or increase the
numbers.
Page Change
Change the display page.
Under display mode, Confirm the change under edition
mode.
Function
Indications
Page Change
Auto
Manual
Stop
LED
Display

DC20D MK2 GENSET CONTROLLER USER MANUAL
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9. Control and operation instruction
Manual Start Mode
press and make sure it is in the stop position before starting.
Press “ ” and the test file indicator is on. At this time, it is detected whether the
connection of each sensor is normal. If the sensor is open, the sensor opens an
alarm. If it is normal, the unit start process is executed in the following sequence.
automatically switch to Generator provide the power when the unit is running
normally. Press “ ” The controller performs the parking process at the following
timing:
Manual start and stop process:
0RPM
Idle
Rated speed
Pre-
heat
delay
5S
Long-
est
pre-oil
supply
delay
0S
Start
Crank
delay
2S 8S
Safe
time
8S
Start
idle
time
5S
Longest
speed
increasing
time
120S
Idle
Rated speed
Pre-
heat
delay
Longest
temperature
increasing
time
10S
Longest
voltage
built/
increasing
time
120S 10S
rated
runn-
ing
Cooling
running time
30S
Stop
idle
time
5S
ETS
solen-
oid
hold
10S
Wait
Stop
30S
warming
up time
Crank
test
time
After the manual start is successful, pressing the "automatic key" can be
converted into an automatic file. The specific working time is as follows:
0RPM
Idle
Rated speed
Pre-
heat
delay
5S
Long-
est
pre-oil
supply
delay
0S
Start
Crank
delay
2S 8S
Safe
time
8S
Start
idle
time
5S
Longest
speed
increasing
time
120S
Idle
Rated speed
Pre-
heat
delay
Longest
temperature
increasing
time
10S
Longest
voltage
built/
increasing
time
120S 10S
rated
runn-
ing
Transfer
back to
mains delay
10S
Cooling
running time
30S
Stop
idle
time
5S
ETS
solen-
oid
hold
10S
Wait
Stop
30S
warming
up time
Crank
test
time
Automatic starting mode:
press and make sure it is in the stop position before starting.
Press “ ” and the test file indicator is on. At this time, it is detected whether the
connection of each sensor is normal. If the sensor is open, the sensor opens an
alarm. If it is normal, wait for the remote start signal to be valid detected the remote
starting signal is valid. The genset will perform the starting process in the following
sequence. When the genset enters the normal rated operation, it will automatically
switch to the generator provide the power. The controller will detect the remote start
signal in real time. When the remote start signal fails to normal, the shutdown

DC20D MK2 GENSET CONTROLLER USER MANUAL
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process after the "loop time delay" is performed.
Auto start and stop process:
Auto
Start
delay
0RPM
Idle
Rated speed
Pre-
heat
delay
5S 5S
Long-
est
pre-oil
supply
delay
0S
Start
Crank
delay
2S
Crank
test
time
8S
Crank
rest
time
10S 8S
Safe
time
8S
Start
idle
time
5S
Longest
speed
increasing
time
120S
Idle
Rated speed
Auto
Start
delay
Pre-
heat
delay
Longest
temperature
increasing
time
10S
Longest
voltage
built/
increasing
time
120S 10S
rated
runn-
ing
Transfer
back to
mains delay
10S
Cooling
running time
30S
Stop
idle
time
5S
ETS
solen-
oid
hold
10S
Wait
Stop
30S
warming
up time
Crank
test
time
Notices in Starting Process
Note 1: During the Cranking time, the controller automatically detects the speed
signal, frequency signal and oil pressure value or the charging voltage (according to
the parameter setting) to reach the judgment condition of successful start, then the
judgment is that the start is successful and the motor relay is closed.
Note 2: Within the safety delay, only respond to emergency stop, over speed,
over frequency, over voltage,Speed signal lost,low fuel level warning,other alarms
are not responded to.
Note 3: No response to alarm and warning of under speed, low frequency,
under voltage, over current,during start idle time.
Note 4: After entering the speed up time, the high-speed relay outputs (if the
idle speed output is configured, if the idle speed output is not configured, then there
is no such time), and the response alarm within this time is consistent with the
starting idle time; within this time, if the speed reaches more than 90% of the "rated
speed", then the "speed up time" is ended;.
Note 5: No response to low frequency, under voltage, over current when
entering the Voltage-up time.
Note 6: After entering rated operation, the Gens load relay output.
Note 7: In the process of shutdown, if the remote starting signal is restored to
be valid within the " Cooling time", the rated operation will be entered again.
Note 8: If the stop key is pressed again during idle time, the idle time will be
canceled and the stop operation will be executed directly.

DC20D MK2 GENSET CONTROLLER USER MANUAL
14
10. Warnings and Shutdown Alarms
Warnings
Notes: Warning is a non-serious failure state, which will not harm the gensets
system for the time being. It only reminds operators to pay attention to the situation
that does not meet the requirements and solve it in time to ensure the continuous
operation of the system. When the warning occurs, the gensets does not stop. Once
the fault is removed, the warning is automatically canceled.
When a warning fault occurs, the public alarm indicator is always on, and
the current fault interface displays warning instructions, but the machine does not
stop.
Low fuel level switch warning
When the controller detects that the AUX. INPUT "Low fuel level warning input"
switch is active, it starts warning delay and lasts for Normal alarm delay. When the
"Low fuel level warning input" switch is enabled, the engine low fuel level switch
warning is reported. Warning lights will light up, Generators will not stop,
displays "ALA.09" on the led screen.
Under battery voltage warning
When the controller detects that the battery voltage is lower than the "Under battery
voltage warning", Then start warning delay and the duration (Normal alarm delay)
have not returned to normal, the warning of Under battery voltage warning is reported.
Warning lights will light up, Generators will not stop, displays "ALA.12" on the
led screen.
Starting fault
Oil pressure sensor disconnected alarm
When the controller parameter "Action if low oil pressure sensor disconnected" is
set to "alarm", When the oil pressure sensor is detected to be disconnected,Then
start alarm delay and the duration (Normal alarm delay) have not returned to normal,
the alarm of Oil pressure sensor disconnected alarm is reported.Alarm lights will
light up, Generators will stop, displays "ALA.13" on the led screen.
Temperature sensor disconnected alarm
When the controller parameter "Action if temperature sensor disconnected" is set
to "alarm", When the temperature sensor is detected to be disconnected,Then start
alarm delay and the duration (Normal alarm delay) have not returned to normal, the
alarm of temperature sensor disconnected alarm is reported. Alarm lights will
light up, Generators will stop, displays "ALA.14" on the led screen.
Fail to Start
If the number of cranks exceeds the predetermined number of cranks, the failure of
start-up will be reported if the start-up of the generating unit is still unsuccessful.

DC20D MK2 GENSET CONTROLLER USER MANUAL
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Alarm lights will light up, Generators will stop, displays "ALA.20" on the led
screen.
Shutdown Alarms
Warning: After the Shutdown Alarm occurs, the system will be locked
immediately and the generator set will be stopped. Only after troubleshooting, press
key to clear the alarm, can it be re-operated.
Notes：When the shutdown alarm failure occurs, the "ALARM" lights will light
up and the generator unit automatically stops.
Emergency stop alarm
When the controller detects that the emergency stop input is grounded,, then start
alarm delay and the duration (Emergency delay) have not returned to normal, the
alarm of Emergency Stop is reported. Alarm lights will light up, Generators will
stop, displays "ALA.01" on the led screen.
Over speed alarm
When the controller detects that the engine speed is higher than “Over speed alarm”,
Then start alarm delay and the duration (Emergency delay) have not returned to
normal, the alarm of over speed is reported. Alarm lights will light up,
Generators will stop, displays "ALA.02" on the led screen.
Under speed alarm
When the controller detects that the engine speed is under than “Under speed
alarm”, Then start alarm delay and the duration (Normal alarm delay) have not
returned to normal, the alarm of under speed is reported. Alarm lights will light
up, Generators will stop, displays "ALA.03" on the led screen.
Low oil pressure sensor alarm
When the controller detects that the engine Oil Pressure is lower than “Low oil
pressure alarm”, Then start alarm delay and the duration (Normal alarm delay) have
not returned to normal, the alarm of low Oil Pressure is reported. Alarm lights
will light up, Generators will stop, displays "ALA.04" on the led screen.
Low oil pressure switch alarm
When the controller detects that the AUX. INPUT port "Low oil pressure alarm
input" switch is active. Start low oil pressure switch alarm delay, for a period of time
“Normal alarm delay”, AUX. INPUT port "low oil pressure alarm input" switch is valid.
Alarm lights will light up, Generators will stop, displays "ALA.05" on the led

DC20D MK2 GENSET CONTROLLER USER MANUAL
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screen.
High Coolant Temperature Sensor Alarm
When the controller detects that the coolant temperature value is higher than the
"High coolant temperature alarm", Then start alarm delay and the duration (Normal
alarm delay) have not returned to normal, the alarm of High coolant temperature
alarm is reported.Alarm lights will light up, Generators will stop, displays
"ALA.06" on the led screen.
High Coolant Temperature Switch Alarm
When the controller detects that the High temperature alarm switch input is valid to
the ground, then start alarm delay and the duration (Normal alarm delay) have not
returned to normal, the alarm of High Temperature Switch is reported. Alarm lights
will light up, Generators will stop, displays "ALA.07" on the led screen.
High Oil Temperature Switch Alarm
When the controller detects that the High temperature alarm switch input is valid to
the ground, then start alarm delay and the duration (Normal alarm delay) have not
returned to normal, the alarm of High Temperature Switch is reported. Alarm lights
will light up, Generators will stop, displays "ALA.08" on the led screen.
Low coolant level switch alarm
When the controller detects that the AUX. INPUT "Low water level alarm" switch is
active, it starts alarm delay and lasts for Normal alarm delay. When the "Low water
level alarm" switch is enabled, the engine low coolant level switch alarm is reported.
Alarm lights will light up, Generators will stop, displays "ALA.10" on the led
screen.
Speed signal lost alarm
When the controller parameter "Action if RPM lost" is set to "alarm", the detected
speed value is 0,Then start alarm delay and the duration (Normal alarm delay) have
not returned to normal, the alarm of speed signal lost warning is reported. Alarm
lights will light up, Generators will stop, displays "ALA.11" on the led screen.
Over frequency alarm
When the controller detects that the generator frequency is higher than “Over
frequency alarm”, Then start alarm delay and the duration (Emergency delay) have
not returned to normal, the alarm of over frequency is reported. Alarm lights will
light up, Generators will stop, displays "ALA.15" on the led screen.
Under frequency alarm
When the controller detects that the generator frequency is lower than “Under

DC20D MK2 GENSET CONTROLLER USER MANUAL
17
frequency alarm”, Then start alarm delay and the duration (Normal alarm delay)
have not returned to normal, the alarm of under frequency is reported. Alarm lights
will light up, Generators will stop, displays "ALA.16" on the led screen.
Over voltage alarm
When the controller detects that the generator voltage is higher than “Over voltage
alarm”, Then start alarm delay and the duration (Normal alarm delay) have not
returned to normal, the alarm of over voltage is reported. Alarm lights will light
up, Generators will stop, displays "ALA.17" on the led screen.
Under voltage alarm
When the controller detects that the generator voltage is lower than “Under voltage
alarm”, Then start alarm delay and the duration (Normal alarm delay) have not
returned to normal, the alarm of under voltage is reported. Alarm lights will light
up, Generators will stop, displays "ALA.18" on the led screen.
Over current alarm
When the controller detects that the generator phase current is higher than “Phase
current over-load alarm”, Then start alarm delay and the duration (Normal alarm
delay) have not returned to normal, the alarm of over current is reported. Alarm lights
will light up, Generators will stop, displays "ALA.19" on the led screen.
Stop failure with speed alarm
When the controller detects that the speed is not "0" after the execution of the
shutdown, the alarm of stop failure is reported. Alarm lights will light up,
Generators will stop, displays "ALA.21" on the led screen.
Stop failure with frequency alarm
When the controller detects that the frequency is not "0" after the execution of the
shutdown, the alarm of stop failure is reported. Alarm lights will light up,
Generators will stop, displays "ALA.22" on the led screen.
Stop failure with oil pressure alarm
When the controller detects that the Oil Pressure is not "0" after the execution of the
shutdown, the alarm of stop failure is reported. Alarm lights will light up,
Generators will stop, displays "ALA.23" on the led screen.
Stop failure with oil pressure switch
When the controller detects that the oil pressure switch has not returned after the
stop, it will alarm, alarm lights will light up, Generators will stop, displays
"ALA.24" on the led screen.

DC20D MK2 GENSET CONTROLLER USER MANUAL
18
11. Parameters setting
Enter the edition page
Please set the parameters according to below steps:
1）In the stop mode, please and simultaneously, then loose, Then system
comes into menu setting.
2）Press to shift up the parameters, press to shift down the parameters,
press to get into parameter changing page.
3）Press to add number, press to reduce number, press cancel.
The value can be increased or decreased continuously when pressing the button
continuously. Press to confirm the value modification.
4）Under display mode，press to exit and save data.
Note: the data can not be saved if the user didn’t press STOP to confirm
the setting.
Parameter setting
No
Parameter
Range (default)
Notes
0
CT rate
5-6000A/5A(500A/5A)
Used for setting genset CT primary
current, secondary rated current 5A.
1
Flywheel
teeth
0-300(0)
If the setting is 0, (RPM sensor
Disabled), then RPM is resulted by Hz.
2
AUX. INPUT
1(Functional
of PIN 8)
0- Disable.
1- Emergency stop.
2- Remote start switch.
3- Low oil pressure
alarm switch.
4- High Coolant
temperature alarm
switch.
5- High oil temperature
alarm switch.
6- Low fuel level warning
switch.
7- Low water level alarm
switch.
Choose the programmable input 1,
only for switch value input
3
AUX. INPUT
2(Functional
of PIN 15)
0- Disable.
1- Emergency stop.
2- Remote start switch.
3- Low oil pressure
alarm switch.
4- High Coolant
temperature alarm
switch.
5- High oil temperature
alarm switch.
6- Low fuel level warning
switch.
Choose programmable input 2, switch
value input or sensor simulation value
input are available; if the sensors of
users are not in the list, please self-
define the sensor’s resistance by
connecting with PC.

DC20D MK2 GENSET CONTROLLER USER MANUAL
19
7- Low water level alarm
switch.
8- 9 Reserved.
10- Oil pressure
sensor VDO 0-10BAR.
11-Oil pressure sensor
DATCON 10Bar
12- Oil pressure sensor
3015237 10Bar
13- Oil pressure sensor
User-defined(PC to
configure）
4
AUX. INPUT
3(Functional
of PIN 16)
0- Disable.
1- Emergency stop.
2- Remote start switch.
3- Low oil pressure
alarm switch.
4- High Coolant
temperature alarm
switch.
5- High oil temperature
alarm switch.
6- Low fuel level warning
switch.
7- Low water level alarm
switch.
8- 9 Reserved.
10- Coolant
temperature sensor
VD0 40 ℃－ 120 ℃ .
11-Coolant temperature
sensor Datcon High.
12- Coolant temperature
sensor 3015238
13- Coolant temperature
sensor MEBAY-Mier.
14- Coolant temperature
sensor User-defined (PC
to configure）
Choose programmable input 3, switch
value input or sensor simulation value
input are available; if the sensors of
users are not in the list, please self-
define the sensor’s resistance by
connecting with PC.
5
Action if oil
pressure
sensor
disconnected
0- Disable
1- Enable
Action if oil pressure sensor
disconnected.
6
Action if
Coolant
Temp. sensor
disconnected
0- Disable
1- Enable
Action if Coolant temperature sensor
disconnected.
7
AUX.
OUTPUT
1(Functional
of PIN 5)
0-6
(3. Public alarm
output )
0. Disable.
1. E.S.T. hold: shutdown output, it is
used for gens with stop solenoid.