Siemens 6SN1123-1AA00-0DA2 Configuration Manual page 265

8 Important Circuit Information
8.6 Application examples with SIMODRIVE 611
Functions
8-264
The user should evaluate the control Categories of the additional circuits =7 to
=9. This depends on how he uses the third–party components/monitoring de-
vices that he selected etc. and how they are integrated into the basic control in
.
a safety–relevant fashion
Note
For machines that are to be classified in a lower Category, e.g. 1 or 2 according
to EN 954–1, after the hazard analysis/risk evaluation or type C Standard, the
control can be principally derived from these circuit examples and implemented
in a more simple, single–channel, system structure!
This also applies to the sub–areas/sub–functions of a machine that, for exam-
ple, according to type C Standards, must be implemented with either a lower or
higher control category, deviating from the basic machine. For example, after
the danger analysis/risk evaluation it can also be necessary that a hydraulic/
pneumatic clamping unit must be controlled in the work area using a two–
handed control device in accordance with category 4.
S
Switching examples =4 to =9
The 2–channel system structure is achieved in this application example:
First shutdown path: The power feed to the drive motors is disconnected via
the start inhibit functions in the drive modules.
The shutdown is realized using terminal 663. The positively–driven feed-
back signal contact of the start inhibit relay via terminal AS1–AS2 is cycli-
cally monitored and intervenes in the EMERGENCY STOP circuit of the
safety relay.
For a detailed description of the start inhibit function, refer to Section 8.5.
Second shutdown path: The line contactor in the NE module galvanically
disconnects the line supply from the DC link of the drive modules.
The shutdown is realized using terminal 48 at the same time (simulta-
neously) with the de–energizing of the contactor coil in a safety–relevant,
electrically isolated fashion using terminals NS1– NS2.
The shutdown is realized, for example, when stopping in an emergency,
from fault signals received from the drive system or via the start inhibit moni-
toring when a fault condition occurs.
After each power–off cycle, the forced normally closed contact 111 – 213 of
the line contactor is monitored in the feedback circuit of the EMERGENCY
STOP safety relay. For a detailed description of the line contactor, refer to
Section 8.2.2.
For an EMERGENCY STOP, the drives are stopped in Stop Category 1 ac-
cording to EN 60204–1; 9.2.2: "Controlled stopping" – the power feed is only
interrupted when the motor has come to a standstill.
Circuit examples =2 and =3, shown in Section 8.7, can be used for basic
and average applications.
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
© Siemens AG 2012 All Rights Reserved
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