User Manual
Chapter 1
GFK-2849A
Oct 2019
Introduction
11
1.5.2
Systems with One RX3i CPU and Two ECM850s
Both examples in this section show systems with one RX3i CPU that has two ECM850s. The
IEC 61850 network can serve up to 128 IEDs (in star topology).
Note that multiple ECM850s in the same rack are not synchronized such that all ECM850s
are guaranteed to power up at the same time. ECM850 configuration differences (SFPs, etc.)
can cause variations in ECM850 power up times.
In the following example, both ECM850s are connected to the same network.
Figure 7
In the next example, the two ECM850s are connected to separate networks.
Figure 8