User`s guide

Section ELECTRICAL INSTALLER
Ed. 04/2012 65
Connection of the CAN BUS cable to the DDC
The CAN BUS cable is connected to the special orange connector supplied with the DDC,
seen in Figure 28.
Figure 28 – Orange connector supplied with the DDC for connecting the wires of the CAN BUS cable.
Before working on the DDC, make sure that it is off. The DDC, just as the electronic
circuit board of the ACF, has jumpers that need to be positioned for either an
intermediate or a terminal node. The configuration of the jumpers on a new DDC is
CLOSED, as seen in Figure 29:
Figure 29 – Direct Digital Controller (DDC) – wiring diagram and partial rear view.
KEY
GND common data A Electrical tape to protect CAN BUS cable shielding
L LOW signal data B CAN BUS cable wires
H HIGH signal data C CAN BUS CABLE wire shielding
J21 jumpers (CLOSED) D Eyelet terminal and fastening screw bottom DDC
A
B
C
D
B
D