Electrical Connection
5
2 Electrical Connection
Figure 1
ICM Electrical Connection
The ICM requires a DC power supply and the two CAN-bus signals
CANL
and
CANH
, as shown in Figure
1
. The numbers shown are the pin numbers of the circular
connector that plugs into the ICM.
•
The DC voltage is typically 24V, but can be 9-36V. See the ICM user guide for
the precise range.
•
Twisted pair cable should be used for the CAN-bus signals, for cable lengths
over a few meters. The cables supplied with the ICM are twisted pair.
•
CAN-bus
requires
the network to be terminated at each end. This must be done
externally to the ICM.
•
The CAN-bus signals
CANL
and
CANH
are referred to the system 0V supply.
These should stay within the common mode range allowed by the ISO-11898-4
CAN-bus standard relative to the ICM 0V connection. This range is -2V to +7V.
This can be normally be ensured by connecting together the ICM 0V and the
0V of the CAN-bus controller. The ``CAN 0V’’ wire shown indicates this link.
