Application, Mode Of Operation And Connection Of The Line Contactor - Siemens 6SN1123-1AA00-0DA2 Configuration Manual

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05.01
8.2.2

Application, mode of operation and connection of the line contactor

The infeed modules include an integrated line contactor that is listed in the Catalog.
The line contactor is electronically controlled (energized) via terminal 48.
In order to safely and reliably disconnect the DC link from the line supply,
e.g. for stopping in an emergency situation, the coil circuit of the line contactor
must additionally be interrupted via terminal NS1–NS2 using electrically isolated
(floating) mechanical switching elements. This means that the electronic control
has no influence when shutting down with electrical isolation. The cable routing
to the connecting terminals must be safely and electrically de–coupled from the
electronics.
Before or at the same time that connection NS1–NS2 is interrupted, the line
contactor must always be opened using terminal 48.
The NC contact 111–213 of the line contactor, positively–driven with the power
contacts, must be included in the feedback circuit of the external, safety–rele-
vant EMERGENCY STOP switchgear combination (safety relay). This means
that the function of the line contactor is cyclically monitored.
Notice
If a protective separation of the power DC link from the supply line is required,
for example, work must be performed on the power unit (connect/disconnect
motor), also ensure that all parallel connections to the power infeed are
electrically isolated using switching contacts. In this case, a possible
user–specific external connection between the electronics power supply and
the power DC link must be taken into consideration.
In order to shutdown the system when the power fails using the DC link energy,
it is possible to have a connection between the P500/M500 and P600/M600
terminals.
If a safe electrical separation is required for this interconnection, the
electronics, also possibly the monitoring module, must also be disabled or this
electronic power supply – power DC link connection must be separated safely
and reliably because otherwise the electronic power supply of the power DC
link can be charged from the auxiliary DC link.
In the setting–up mode (only with 1FT5 motors), the connection between the
electronics power supply and the power DC link must also be disconnected.
© Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
8 Important Circuit Information
8.2 Infeed modules
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