Eaton SmartWire-DT SWD Series Manual

11 Interface for NZM compact circuit-breakers11.8 ProgrammingSmartWire-DT module IP20 01/20 MN05006001Z-EN www.eaton.com 243Behavior of NZM-XSWD-704 switching functionThe switching function behaves differently in devices belonging to deviceversions up to 03 and in devices belonging to device version 04 and higher.In both cases, a switching command will remain active even if it cannot becarried out immediately. Delayed switching is possible if, for example, theremote operator is powered after a delay.The following scenario is an example that could result in unexpected switch-ing:1. A switch command is issued.2. Due to certain hardware conditions, the command cannot be carried out,e.g., the remote operator is not being powered.3. The above condition is fixed, e.g., the remote operator's power supply isturned on.4. The switching operation will then be performed immediately and, if appli-cable, unexpectedly, as the switching command will have been saved.How the switching function behaves in devices belonging to device ver-sions up to 03A switching operation will only be carried out if the circuit-breaker's state issignaled to the NZM-XSWD-704 via the latter's inputs. Switching on will onlybe possible if the switch is open and, vice versa, switching off will only bepossible if the switch is closed. In other words, the auxiliary contacts mustalways be wired to the inputs in order for switching operations to be possi-ble.Once a switching command is issued, it cannot be cancelled. The corre-sponding switching operation must first be carried out.How the switching function behaves in devices belonging to device ver-sion 04 and higherThe circuit-breaker can always be switched, regardless of its state. Eventhough wiring the inputs is not absolutely required in order to be able to per-form switching operations, we recommend controlling the switching opera-tions.Measures for using the remote operatorFor devices belonging to device versions up to 03: DANGERIf the remote operator is used, switching commands may bedelayed and therefore carried out when unexpected.This may result in voltages being applied or motors starting atunexpected moments.Because of this, make sure to carry out the "Measures for usingthe remote operator" ￫ Page 243.