aerl
COMMS MANUAL
COOLMAX SR
Australian Energy Research Laboratories, Pty.Ltd
AER07.004 – Version G2 v9
13
th
January 2016
16 of 21
4 CAN COMMUNICATIONS
4.1 CAN NETWORK TOPOLOGY
Multiple COOLMAX SR units can exist on the same CAN bus and this can be connected to other
networks using a CAN-Ethernet Bridge adaptor.
The CAN bus is structured as a linear network, with short stubs branching from 'T' connectors on
the main bus backbone to each device. The CAN bus data lines must be terminated at each end of
the main bus with 120 Ω resistors between the CAN-H and CAN-L signals.
A simple method of implementing the 'T' junction is shown in
Figure 6
. The in and out wire of each
CAN line are twisted together and screwed into the appropriate terminal on the CAN connector, as
shown below in
Figure 7
. This connector plugs into J3 as shown in
Figure 8
.
Figure 6 - CAN Network Wiring Diagram
