1. Dupline Elevator Bus
Jens Neigaard

2. Dupline 3-wire bus for Elevators
The signals and power
For all the pushbutton
Panels and Position
Indicators run on the
Same 3 wires
Jens Neigaard

3. Used for the pushbuttons and lamps at the landing stations
I/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. Used for the pushbuttons and lamps in the car
I/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. Channel Generator Function
The 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. Interfacing Options The Master Modules read
And write directly into the
PLC memory
Jens Neigaard

7. Total Current on the 3’rd wire < 3.5 A Rule no. 2
Max Power Load
Rule no. 1
Total Current on the 3’rd wire < 3.5 A
Rule no. 2
Total Current x Resistance in Common Wire < 3.5 V
Jens Neigaard

8. What is the max current on 100m 1.5 sq.mm. Cable ?
Max Power Load
Example
What 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. How to increase max current ?
Max 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. Do not connect Dupline Common to Ground
Installation Rules
Do not connect Dupline Common to Ground
Jens Neigaard

11. Dupline Elevator Bus- Features
Easy to use
Robust and reliable
Easy to interface to PLC’s
Flexible
Cost-effective
Jens Neigaard

12. Dupline Elevator Bus- Benefits
Reduced installation time (up to %)
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
Jens Neigaard

13. Our customers until now
Typically middle-sized independent elevator companies without own electronics R&D
Companies using PLC for controls
Jens Neigaard

14. Our competitors - And their problems
The big companies, making complete elevators or elevator controls systems, have developed their own solutions based on CAN or LON
- And their problems
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
Jens Neigaard

15. The trend
Elevator control systems without bus solution are to a higher and higher extend considered as old-fashioned
The future
Dupline combined with CAN, LON or Ethernet as upper level bus could be an opportunity to work with the big companies
Jens Neigaard