Dupline Elevator Bus

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. 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. 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. 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. 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. 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. 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. 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 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 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 • 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