Explanation
There are a few different situations that could cause this to happen. For Example, the stations, or the zones in the Sensor3 Rack, could be set to the wrong Echo Space. You could have a wiring issue. Or it could be a compatibility issue. To check for these things, please see the steps below.
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Most CEM3 backplanes shipped since December 2021 do not have an Echo communication chip. The Station Bus terminals on the backplane will have a 'NO STATION BUS' label affixed to them to prevent landing Echo bus wires on the backplane.
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