11 Interface for NZM compact circuit-breakers
11.8 Programming
SmartWire-DT module IP20 01/20 MN05006001Z-EN www.eaton.com 243
Behavior of NZM-XSWD-704 switching function
The switching function behaves differently in devices belonging to device
versions 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 be
carried out immediately. Delayed switching is possible if, for example, the
remote 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 is
turned 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 03
A switching operation will only be carried out if the circuit-breaker's state is
signaled to the NZM-XSWD-704 via the latter's inputs. Switching on will only
be possible if the switch is open and, vice versa, switching off will only be
possible if the switch is closed. In other words, the auxiliary contacts must
always 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 higher
The circuit-breaker can always be switched, regardless of its state. Even
though 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 operator
For devices belonging to device versions up to 03:

DANGER
If the remote operator is used, switching commands may be
delayed and therefore carried out when unexpected.
This may result in voltages being applied or motors starting at
unexpected moments.
Because of this, make sure to carry out the "Measures for using
the remote operator" ï¿« Page 243.
To Next Page
Loading...
Need help?
General
