What happens if a dSM is defective? digitalSTROM Support September 26, 2018 07:05 Updated Follow Devices without digitalSTROM functions are not impaired in their function. digitalSTROM devices can still be switched via their local push-buttons (e.g. a floor lamp with cord dimmer). The dSM must always be replaced in this situation. Related articles What is the difference between a dSM11 and a dSM12? Does a digitalSTROM meter (dSM) have to be reconfigured after an exchange? Is the dSM equipped with surge protection? How often are the energy readings updated in the dSM? What is the maximum cable length?