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Jens Neigaard 1
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
Jens Neigaard 2
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
Dupline 3-wire bus for Elevators
The signals and powerFor all the pushbuttonPanels and PositionIndicators run on theSame 3 wires
Jens Neigaard 3
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
I/O-board with 2 inputs and 2 outputsI/O-board with 2 inputs and 2 outputs
• Used for the pushbuttons and lamps at the landing stations• Small dimension for easy integration in fixtures• 2 contact inputs with built-in pulse prolongation that ensures that even short button activations are captured by the PLC• 2 PNP transistor outputs for driving the lamps
Jens Neigaard 4
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
I/O-boards with 8 inputs, 8 outputs or 4 In / 4 OutI/O-boards with 8 inputs, 8 outputs or 4 In / 4 Out
• Used for the pushbuttons and lamps in the car• Built-in pulse prolongation ensures that even short button activations are captured by the PLC• 8 output board is used for control of the position indicators
Jens Neigaard 5
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
The Master ModuleThe Master Module
• Channel Generator Function• Serial Interface for the PLC to exchange Dupline I/O-data• Synchronizes the Power Supply on the 3’rd wire with the Dupline signalling
Jens Neigaard 6
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
Interfacing Options
The Master Modules readAnd write directly into the PLC memory
Jens Neigaard 7
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
Max Power LoadMax Power Load
Rule no. 1Total Current on the 3’rd wire < 3.5 A
Rule no. 2Total Current x Resistance in Common Wire < 3.5 V
Jens Neigaard 8
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
Max Power LoadMax Power Load
ExampleWhat is the max current on 100m 1.5 sq.mm. Cable ?
• 100m of 1.5 sq.mm. Cable has a resistance of app. 1.3 Ohms• Max current load = 3.5V / 1.3 Ohms = 2.7A
Jens Neigaard 9
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
Max Power LoadMax Power Load
How to increase max current ?
• Install an additional Power Supply and a Dupline Power Supply Coupler in the other end of the cable• This increases the max current with a factor of 4, because each power supply supplies half the current in half the wire length
Jens Neigaard 10
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
Installation RulesInstallation Rules
• Do not connect Dupline Common to Ground
Jens Neigaard 11
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
• Easy to use• Robust and reliable• Easy to interface to PLC’s• Flexible• Cost-effective
Dupline Elevator Bus- Features
Jens Neigaard 12
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
• Reduced installation time (up to 80-90 %)• Reduced cable cost• One-size-fits-all control panel• If a PLC is used, the cost of the Dupline modules is to some extend compensated by the savings on PLC I/O expansion modules and cable
Dupline Elevator Bus- Benefits
Jens Neigaard 13
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
• Typically middle-sized independent elevator companies without own electronics R&D• Companies using PLC for controls
Our customers until now
Jens Neigaard 14
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
• The big companies, making complete elevators or elevator controls systems, have developed their own solutions based on CAN or LON
Our competitors
• CAN and LON are too expensive solutions especially for the small elevators•CAN and LON er complex bus systems that seem to be overkill for the simple elevators• The big companies are looking for a
Cost-effective bus solution for the pushbutton panels and position indicators
- And their problems
Jens Neigaard 15
Dupline 3-wire Bus for ElevatorsDupline 3-wire Bus for Elevators
• Elevator control systems without bus solution are to a higher and higher extend considered as old-fashioned
The trend
• Dupline combined with CAN, LON or Ethernet as upper level bus could be an opportunity to work with the big companies
The future
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