DMI
24
11/04 MN01219002Z-EN
Connecting circuit-breakers
The circuit-breaker is connected to the DMI using the
NZM-XDMI-CAB cable. This ensures the correct adaption of
signals in order to ensure interference-free data transfer, as
well as providing the circuit-breaker with the required power
supply.
It is then no longer dependent on the current in its contact
system but can supply up-to-date process information at any
time, even if it has just tripped and thus its own power
supply is disconnected.
X Remove the cover of the DMI:
X Plug the cable into the interface for the circuit-breaker or
PC connection f on the DMI (a fig. 1, Page 12).
X Open the front flap on the NZM.
X Remove the cover of the COM interface.
X Push in the plug under the front flap.
X Fit the plug onto the COM interface until it is flush.
X Close the front flap of the NZM.
X Fit the supplied ferrite ring on the cable to the circuit-
breaker approximately 5 to 10 cm from the plug at the
circuit-breaker end.
Caution!
Before connecting the circuit-breaker to the DMI, ensure
that no parameters are configured in the DMI that will
impair the correct functioning of the circuit-breaker. For
example, lower tripping values may have been configured
in the DMI than in the circuit-breaker. These may be
accepted as valid values when both devices are connected
to each other, thus causing the circuit-breaker to trip
prematurely. For detailed information on parameter
setting and data transfer refer to a section “Parameter
setting”, Page 35.
h
The cable has an anti-rotation feature and can only be
plugged in the correct position.
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