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How many expansion racks can you have on the M340 PLC?

Published date: 17 July 2019

Need to add more modules to the rack. How many expansion racks can I have with M340 PLC?

Product Line:
M340 PLC

EcoStruxure Control Expert
Unity Pro


A BMXXBE1000 will be needed for each rack to communicate, setting the rotary switches accordingly.

The maximum M340 expansion racks allowable:
P341000 Max. 2 XBP racks = 1 Main Rack + 1 expansion rack
P3420xx Max. 4 XBP racks = 1 Main Rack + 3 expansion rack

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