Robur GAHP Line AR Series, Installation, Use And Maintenance Manual

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Electrical installer section
Ed. 2014-08
63
To connect the CAN bus cable to a DDC
You will need: access to the rear cover of the DDC.
1. Position the jumpers on the DDC according to the type of node being configured. If
necessary, open the rear cover of the DDC by unscrewing the 4 screws; after the
jumpers have been correctly positioned close the cover again and retighten the 4
screws.
The positions of the jumpers are illustrated in the following two figures:
- If the DDC is an
intermediate node of the network (there are 6 wires in the orange
connector), position the jumpers on the DDC as illustrated in Figure 28: OPEN.
Figure 28 - Connection of 2 CAN bus cables to the DDC: the DDC IS AN INTERMEDIATE NODE. The diagram
shows the positions of the wires of the CAN bus cable and the jumpers: OPEN
- If the DDC is a terminal node of the network (i.e. there are 3 wires in the orange
connector), position the jumpers on the DDC as illustrated in Figure 29: CLOSED.
Figure 29 - Connection of 1 CAN bus cable to the DDC: the DDC IS A TERMINAL NODE. The diagram shows the
positions of the wires of the CAN bus cable and the jumpers: CLOSED
DDC
H L GND
J21
H L GND
J21
DDC