Use, Mode Of Operation And Connection Of The Line Contactor - Siemens SIMODRIVE 611 Planning Manual

9 Important Circuit Information
9.2 Infeed modules
9.2.4
9
9-230

Use, mode of operation and connection of the line contactor

The infeed modules have a standard line contactor, integrated in the module
itself.
The line contactor is electronically controlled via terminal 48.
The coil circuit of the line contactor must be interrupted using floating mechani-
cal switching elements via terminals NS1–NS2 in order to ensure that the DC
link is safely and electrically disconnected from the line supply, e.g. for the
emergency stopping function. Thus, the influence of the electronic control has
no effect when the unit is disconnected with electrical isolation. The cable rou-
ting to the connection terminals must be safely and electrically de–coupled from
the electronics.
When the NS1–NS2 connection is interrupted, beforehand, or at the same time,
the line contactor must be opened using terminal 48.
The NC contact 111–213 of the line contactor is positively driven with the power
contacts, and must be inserted in the feedback circuit of the external safety–re-
lated EMERGENCY STOP switchgear combinations. This means that the line
contactor function is cyclically monitored.
Notice
In order that the power DC link is reliably isolated from the supply, it should be
ensured that all connections in parallel to the power infeed are electrically isola-
ted through switching contacts. Here, it is important that any user–specific ex-
ternal connection between the electronics power supply and power DC link is
taken into consideration.
In order to shutdown the drive at power failure and to use the DC link energy,
there can be e.g. a connection between terminal P500/M500 and P600/M600.
This connection between the electronics power supply and the power DC link
must be safely and reliably disconnected and remain disconnected, as other-
wise, the electronics power supply of the power DC link could be charged
through the auxiliary DC link.
In the setting–up mode, the connection between the electronics power supply
and power DC link must also be disconnected.
When using a monitoring module, which is connected to the power DC link
through P500/M500, and is also connected to the line supply, when the line
contactor is opened, either the connection between the line supply and the
monitoring module or the connection between the P500/M500 and power DC
link must be reliably and safely interrupted using contacts.
 Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
05.01