RAD-Galaxy User’s Guide
5
© 2016 Intrepid Control Systems, Inc.
Version 1.2 - November 28, 2017
Switch to
Nodes
PC to
Switch
PC to
Nodes
AE
Node 1
AE
Node 2
AE
Node 6
PC
RAD-Galaxy
Tapped
from
Nodes
Tapped
from
Switch
Nodes to
Switch
...
...
...
Automotive Ethernet Switch
AE
3
AE
4
AE
5
Figure 2: Using the RAD-Galaxy as an Active Tap Between AE Nodes and Switch.
Before inserting the RAD-Galaxy,
Automotive Ethernet nodes 1 to 6 were directly connected to the switch at top left. Each connection was broken and the
pairs connected to the appropriate ports on the RAD-Galaxy (black lines). Every transmission continues to be sent to its prior
destination (blue arrow lines following the physical connections and the “virtual” internal connections shown in gray within the
device). In addition, copies of each message are transmitted by the RAD-Galaxy to the attached PC (dashed lines). Optionally,
messages from the PC may also be sent to any switch port or ECU (red arrow lines).
Figure 3 shows a similar setup to that of Figure 2, except with the RAD-Galaxy interposed
between 6 pairs of Automotive Ethernet nodes, rather than between nodes and a switch. Note
that the RAD-Galaxy has 12 connections, which are arranged into the following pairs: 1+2,
3+4, 5+8, 7+6, 9+10 and 11+12. This is explained further in Section 3.2.
