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

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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

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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

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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