Marine Applications of Digital Databus Systems

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Marine Applications of Digital Databus Systems

• Cole Hersee Company

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Topics

• Brief history of Digital Databus (DDB) technology
  
• What applications are there for DDB technology in
  the marine market?
• What systems are now available on the market for
  marine applications?
• General purpose
• Focused application
• Details of the Cole Hersee MiniBus Mark II DDB

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Quick History of DDB

• Automotive/Truck
• Detroit Diesel
• DDEC
• SAE technical paper
• SAE standards
• J1587 message format
• J1708 hardware
• J1938 data link layer

• Marine
• Each marine electronics manufacturers own
  interface
• Interface agreements between manufacturers
• NMEA 0183
• NMEA 2000

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What can DDBs do on boats?

• Enables engines to talk to panel instruments
• Enables electronics units to talk to each other
• Navigation (Radar, Sat-Nav, LORAN, Depth)
• Auto-pilot
• Communications
• Fly-by-Wire (throttle, shift and steering)
• Electrical system control

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What types of DDB systems are currently
available for marine?

• General Purpose DDB Systems
• Capable of handling everything
• Focused Application DDB Systems
• Instrumentation
• Power control
• Systems Bridges
• Gateways, a bridge between General Purpose and
  Focused Application DDBs

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General Purpose DDB Systems

• CAN - SAE J1939 etc, CAN - NMEA 2000, etc. are
  General Purpose systems
• Full Duplex - can talk and listen at the same
  time.
• All devices must understand all messages from all
  other devices, must communicate with each other,
  must recognize new equipment
• So every device needs to contain very intelligent
  (expensive!) microcomputers and associated
  electronics circuitry. A General Purpose DDB
  requires complex software.

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Focused Application DDB Systems

• Generally lower priority (slow is OK) tasks
• Engines communicating with Instruments
• Switches communicating with power distribution
• Half-Duplex or Simplex (push-to-talk)
• Master/Slave
• Master Traffic Cop
• Master continually polls all units on the DDB
  System
• All communications through the Master

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Power Control many applicationsnon-intelligent,
non-digital

• Bilge blowers
• Bilge pumps
• Head pump fan
• Live bait well pump
• Fish well pump
• Trim tabs
• Anchor winch
• Windlass
• Accessories

• Navigation lights
• Anchor lights
• Panel lighting
• Interior lighting
• Spreader lights
• Courtesy lights
• Horn
• Windshield wipers
• Motorized hatches

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Cost of DDBsfor traditional hi-amp electrical
power control

• Super high-speed . Not required
• Large message content . Not required
• Large memory. Not required
• Automatic recognition of equipment type,
• manufacturer, model number, calibration,
• configuration, etc . Not required
• High cost of General Purpose DDB Systems
  Dont need it

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Cole HerseeMiniBus Mark II

• A closer look at this Focused Application DDB ...

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Cole Hersee MiniBus Objectives

• Provide complete power control
• Replace conventional power distribution panels
• Provide programmable electronic circuit breakers
• Provide system status feedback to operator
• Improve system reliability
• Reduce system cost
• Eliminate wiring harness from power distribution
  panel to helm other control stations

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Cole Hersee MiniBusEliminate rats nest wire
harnesses
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Cole Hersee MiniBus - a Focused
ApplicationHi-Current Power Control DDBThe
building blocks...
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Reliable Micro-Current Switch
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48450 Switch Interface Module
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48408 Power Distribution Module
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PDM - The Heart of the MiniBus

• Functionally replaces the power distribution
  panel
• Provides 8 outputs, at up to 20A each (100A max)
• Provides Electronic Circuit Breakers for each
  output
• Provides power to all SIMs on the system
• PDMs operate with any input voltage from 9 to 32V
  DC - operates on both 12V 24V systems
• One PDM Master controls the entire system
• PDM Master determines...
• which switch controls which output
• the type of switch action for all switches

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Master - Slave Polling.
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MiniBus DDB System

• CH proprietary communications protocol
• RS-485 databus interface Half-Duplex
• System capacity
• Up to 128 separate switching channels
• Up to 16 PDMs
• Up to 8 SIMs
• Data cable length 200ft
• No termination resistor load
• Can be close-looped back to starting unit!

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MiniBus Mark II PDM Connections
Power
Databus cable
Outputs
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The PDM

• PDM Master polls SIMs for info, then relays that
  info to the appropriate PDM output
• PDM Master verifies that the output really did
  execute the command (turned output On/Off)
• PDM advises SIM if the command has been
  successfully executed or if a fault is detected.
• PDM outputs all have manually-resettable
  solid-state circuit breakers

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PDM Outputs

• Eight 20 Amp circuits
• Max 100 Amps per PDM
• Outputs are rated for
• Resistive loads
• Reactive loads (motors, etc.)
• Incandescent lighting (high surge current)

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Short-circuit overcurrent protection

• Each output functions as a remote
  manually-resettable electronic circuit breaker
• Software algorithm simulates actions of
  conventional fuse or circuit breaker

• Programmable trip currents
• 2.0 Amps
• 3.0 Amps
• 4.0 Amps
• 5.0 Amps
• 7.5 Amps
• 10 Amps
• 15 Amps
• 20 Amps

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Input - the DSRocker

• Its the human interface
• Its the only thing the user sees
• Its not only the command device,
  its also the acknowledgement device
• Its the users link with what they want to
  happen - and their feedback
• Switches are totally configurable...

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Switch ConfigurationsOne Switch Model for all
functionsSwitch action is set when the PDM
Master is programmed

• Momentary switch
  On only while switch is depressed
• Toggling switch
  Push On, push Off
• Latching switch
  Top On, bottom Off

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DSRocker Features

• Ultra-reliable microamp low milliamp switching
• Environmentally sealed
  switch contacts sealed to IPC-67 Standards
• Independent mega-bright LEDs for true function
  indication and night lighting
• Snap-in housing
• Standard large rocker mounting hole
• Available with custom back-lit graphics

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MiniBus Mark II SIM Connections
Optional audible alarm
Databus cable
To switches
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The SIM

• In response to polling from the master unit,
  the SIM
• Scans up to 16 switches in 8 DSRockers
• Communicates On/Off status to the PDM via
  the DDB
• In response to acknowledgement info from the
  master unit, the SIM causes LEDs
  in the DSRockers to
• Light ( switch command executed) or
• Blink on-off ( fault detected)

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MiniBus Mark II Reliability

• Reliability - Major issue in marine applications
• Reliability - Fundamental project objective
• Reliability Proper function when subjected to
• Physical environmental extremes
• Electrical environmental extremes
• Abnormal operating conditions beyond specs.

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Protection Alarm Modes

• 1. Output direct short circuit protection
• 2. Output over-current protection
• Programmable electronic circuit breaker mode
• 3. No Load alarm

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Protection Alarm Modes

• 1. Output direct short circuit protection
• 2. Output over-current protection
• 3. No Load alarm
• 4. Thermal Overload alarm shutdown
• Thermal shutdown for each output
• Overall thermal shutdown PDM heat sink monitor
• Selected outputs default On for limp-home mode
• 5. Communications Failure alarm
• Selected outputs default On for limp-home mode

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Additional Protection

• Communication System Control Electronics
• Loss-Of-Ground protection
• Overvoltage protection
• Reverse Polarity protection
• Transient protection
• DDB lines additionally protected from
  short-circuits to ground or B
• Sealed electronics
• Ignition-proof
• Intrinsically safe
• Environmentally tested to SAE J-1455

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• MiniBus Software

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Programming a SIM
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Programming a slave PDM
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Programming a PDM Master
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Hi-Amp Power Switching System

• the switch people
• for over 80 years.
• now your digital switching partner

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Transitioning to the MiniBus

• Cole Hersee partnering with you on -
• Engineering custom programming
• Production scheduling
• Sales support
• System development
• Implementation planning
• Compliance with applicable industry standards

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MiniBus

• Simple building-block system
• Rockers SIMs PDMs
• Accessories
• Electronic timers.
• 85A solid-state solenoid.
• Digital conventional switches.
• Expandability!

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Cole Hersee Timers
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Cole Hersee Digital Switches
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Cole Hersee Electronic Solenoids
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Typical system cost

• Basic 8-output system approx 200
• Reduced rigging time
• Reduced inventory cost (fewer part
  numbers to stock)
• Reduced weight
• Increased flexibility customer features

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Typical customer applicationsand MiniBus Mark II
installations
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DDBs
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Battle-proven!