Need to replace or add an xP expansion module.
EcoStruxure Building Operation
xP Expansion Module
When replacing or adding an xP expansion module does the controller need to be powered off?
When replacing or adding an xP expansion module the controller must be powered off, i.e., hot-swapping is not allowed.
Adding an expansion module to a controller requires the controller to be cold-started.
After the cold-start the CPU light on the first xP module should blink once at a rate of about once every 2 seconds. This is considerably slower than the controller CPU LED it is connected to.
If a second xP module is connected, it also has about 2 seconds between flashes, but it will flash twice indicating it has detected the second module.