auto maskin Marine Pro 400 Series User manual

Publication P/N 1300079
User Manual
400 Series
SDU 410 Safety Shutdown Unit, P/N 1006451

Table of contents
1 Preface 3
1.1 About this Manual 3
1.2 Responsibilities 3
1.3 Revisions 3
1.3.1 Document History 4
2 Product Overview 4
2.1 Indication LEDs 4
2.1.1 Status LEDs 4
2.1.2 Shutdown and Fault LEDs 5
2.1.3 Flashing and Lit LEDs 5
2.2 Shutdown Channels 5
2.2.1 Switch Channels 5
2.2.2 Pickup Channels 6
2.3 Shutdown Situations 6
2.3.1 From Overspeed 6
2.3.2 From Switch 7
2.4 Relays and Other Outputs 7
2.4.1 Relays 7
2.4.2 Shutdown Coil 8
2.5 Buttons and Other Inputs 8
2.5.1 Buttons 8
2.5.2 Shutdown Override 9
2.5.3 Acknowledge 9
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1 Preface
1.1 About this Manual
This manual has been published primarily for professionals and qualified personnel.
The user of this material is assumed to have basic knowledge in marine systems, and must
be able to carry out related electrical work.
1.2 Responsibilities
All information in this manual is based upon information at the time of printing. For updated
information, please contact your local distributor.
1.3 Revisions
This User Manual is valid for the following firmware version of the SDU 410.
Configuration Manual revision: November 2020
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Work on the low-voltage circuit should only be carried out by qualified and
experienced personnel.
Installation or work on the shore power equipment must only be carried out by
electricians authorized to work with such installations.
It is the sole responsibility of the installer to ensure that the installation work is
carried out in a satisfactory manner, that it is operationally in good order, that the
approved material and accessories are used and that the installation meets all
applicable rules and regulations.
Auto-Maskin continuously upgrades its products and reserves the right to make
changes and improvements without prior notice.
The crossed-out wheeled bin symbol indicates that the item should be
disposed of separately. The item should be handed in for recycling in
accordance with local environmental regulations for waste disposal.
By separating a marked item, you will help reduce the volume of waste
sent to incinerators or land-fill and minimize any potential negative impact
on human health and the environment.
Firmware Version
Release
1.49
November 2020

1.3.1 Document History
2 Product Overview
The SDU 410 is the safety module. It can be used standalone, or linked to a DCU Engine
Controller in the 200 Series or 400 Series.
The SDU 410 is mandatory in classed installations that are to be type approved.
When linked to a DCU, the DCU will detect it automatically.
2.1 Indication LEDs
2.1.1 Status LEDs
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Revision
Date
Description
1.0
09.2020
Initial Release Revision.
1.1
12.12.2016
Updated according to FW 1.48 in addition to other minor changes.
1.2
11.04.2018
Updated according to naming convention and clarified pickup usage.
1.3
18.11.2020
Updated according to FW 1.49.
LED
Description
POWER
Lit when power is applied and above 23V.
Flashing if voltage is below 23V.
Alarm if voltage is below 23V + 30 seconds. This will activate the
buzzer and the Fault relay.
Note! The SDU will disable all channels if the power supply is below
21 V.
LOAD REDUCTION
LED lit when SDU is in load reduction state. That is, when any of the
configured channels are indicating load reduction.
RUNNING
LED activates when the SDU senses engine speed above configured
setpoint, typically 400 rpm.
TACHO 1
LED lit if engine speed above 5 rpm.
TACHO 2
LED lit if engine speed above 5 rpm.
SHUTDOWN OVERRIDE
The Shutdown Override input channel is activated.
BUZZER
The built-in buzzer is active.
COM 1
Flashes when the SDU communicates with a DCU engine panel.
COM 2
Flashes when the SDU communicates on its Modbus RTU interface.

2.1.2 Shutdown and Fault LEDs
2.1.3 Flashing and Lit LEDs
2.2 Shutdown Channels
2.2.1 Switch Channels
There are eight switch input channels that can initiate a shutdown situation.
Each channel can be configured with the following parameters:
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COM 3
Flashes when the SDU communicates on the ethernet interface.
LED
ACTIVE
FAULT
SWITCH 1-8
Lit when in load reduction or
shutdown.
Lit when channel wiring is
faulty.
SHUTDOWN
Lit for any shutdown situation.
Lit if the Shutdown Coil output
detects a broken coil.
OVERSPEED
Lit when in Overspeed.
Quick flash when in
Overspeed Test mode.
Lit if the Shutdown Override
input channel detects faulty
wiring.
Flashing
New and unacknowledged situation.
Steady Lit
Operator acknowledged, but the situation is still
present.

●Event can be Disabled, Load Reduction or Shutdown. Event can also be configured
as “Shutdown Override #2”.
●Delay before shutdown [1 – 60 sec].
●RPM dependency makes the channel activate above a certain engine rpm only.
●Keep enabled on Shutdown Override makes it possible to keep the channel
enabled in a Shutdown Override situation.
●On Run Only keeps the channel from indicating a shutdown while the engine is not
running. This is a typical configuration for pressure sensors.
●Delayed Shutdown delays the shutdown.
2.2.2 Pickup Channels
There are two pickup channels on the SDU. The unit can be configured to use one or two
channels.
When a valid pickup signal is received on either channel, the corresponding LED will be lit.
The LED will be lit when the measured engine speed is above 5 rpm.
If two channels are being used, and the measured engine speed on the two channels are
different, then the SDU will be “using” the one that indicates the highest engine speed.
If one of the two channels is missing/faulty while the engine is running, then the LED for the
missing channel will flash. This is typically caused by a broken wire. If the SDU is linked to a
DCU, then the DCU will issue a warning for this situation.
2.3 Shutdown Situations
2.3.1 From Overspeed
If either of the two configured engine speed inputs senses an engine speed higher than the
configured max setting, then the SDU will activate the common shutdown outputs.
Shutdown Override
The Shutdown Override input does not disable the Overspeed Shutdown.
Indication
The red LED OVERSPEED will be lit.
The red LED SHUTDOWN will be lit.
Acknowledge
When the engine has stopped, the shutdown can be reset using the Acknowledge button on
the SDU.
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Some classification societies require the use of both pickup inputs

2.3.2 From Switch
If either of the switches indicates a shutdown, then the SDU will activate the common
shutdown outputs.
Shutdown Override
Each switch channel may be configured to disregard the Shutdown Override input
command.
Indication
The red LED for the corresponding switch will be lit.
The red LED SHUTDOWN will be lit.
Acknowledge
When the engine has stopped, the shutdown can be reset using the Acknowledge button on
the SDU.
2.4 Relays and Other Outputs
2.4.1 Relays
One relay is fixed for SHUTDOWN. The other 4 relays are configurable.
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Relay Function
Description
SHUTDOWN
Activates for any shutdown.
Stays activated until engine has stopped, and the operator
command the Acknowledge button.
CRANK CUTOFF
Activates at the configured Engine Run setpoint, typically
400 rpm.
Deactivates when the SDU senses that the engine has
stopped (<5 RPM).
BUZZER
Activates for any new shutdown or fault.
Deactivates when the operator command the Acknowledge
button.
FAULT
This is the Common Fault indication.
Activates for any new fault.
Deactivates when all faults are acknowledged and has
disappeared.
RUNNING
Activates at the configured Engine Run setpoint, typically
400 rpm.

2.4.2 Shutdown Coil
This output activates for any shutdown.
It deactivates when the engine has stopped + eight (8) seconds.
Coil Detection
The SDU indicates a fault if there is a broken wire in the connected relay coil on terminals 4
and 5.
The coil impedance shall be in the range 300 – 700 ohm.
Power Supply
The Shutdown Coil operates from its own separate power supply on terminals 6 and 7.
2.5 Buttons and Other Inputs
2.5.1 Buttons
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Deactivates when the SDU senses that the engine has
stopped.
OVERSPEED SHUTDOWN
Activates if the SDU senses an overspeed shutdown.
Deactivates when the engine is stopped and the event is
acknowledged.
OVERSPEED TEST MODE
Activates when the SDU is in overspeed test mode.
SHUTDOWN OVERRIDE #1
Activates when the SDU is in shutdown override mode.
SHUTDOWN OVERRIDE #2
Activates if any of the channels are configured as
“Shutdown Override #2”, and at least one of these inputs
are active.
LOAD REDUCTION
Activates when in load reduction state.
DELAYED SHUTDOWN IMMINENT
Activates when the SDU will perform a shutdown, but the
channel has a delayed shutdown configured.
Button
Description
Acknowledge
Whenever there is a flashing LED in the SHUTDOWN or FAULT section,
this can be Acknowledged by the user by commanding the Acknowledge
button.
Overspeed Test
Press and hold until the Overspeed Test LED flashes rapidly.
The SDU is now in Overspeed Test mode, where the overspeed setpoint
is reduced to 95% of the configured Nominal speed. Now, start the
engine.
Note! If the Overspeed Shutdown has been disabled in the
configuration, then this test will NOT generate a shutdown.

2.5.2 Shutdown Override
Connect a normally open (NO) switch, with a 10k ohm resistor across the two terminal inputs
50 and 51.
When activated by closing the switch, the SDU will disable all shutdown channels, unless
those configured specifically to work also in Shutdown Override.
An example of the latter is Manual E-Stop, which shall always work.
2.5.3 Acknowledge
This is a remote acknowledge input channel that works exactly as the Acknowledge button.
Connect a normally open (NO) switch, across the two terminal inputs 52 and 53.
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The Overspeed Test mode is deactivated by either:
● Performing the test, ending in an Overspeed Shutdown at 95%
of the Nominal setpoint.
● Pressing the Overspeed Test button again.
● Automatic timeout after 5 minutes.