Safety Functions - Siemens 6SN1123-1AA00-0DA2 Configuration Manual

02.12
05.01
9.3Safety of machinery – safety–related parts of controls according to EN ISO 13849–1:2008
9.3.5

Safety functions

Description
With the SIMODRIVE 611 converter system, using the appropriate circuit, the
following safety stop functions can be implemented:
Table 9-3 Safe stop functions
Function
Safe standstill Safe torque off
Safe stop 1 Safe stop 1
(time controlled)
It should be noted that the safety functions only represent a very small part of
the device functions.
A two–channel structure with suitable fault identification for the safety functions
can be configured by using an appropriate circuit.
In order to implement the Safe Torque Off safety function in two channels, the
line contactor integrated in the infeed modules as well as the safety relay inte-
grated in the control modules should be used. The positively driven NC contacts
of the line contactor and the safety relay should be evaluated as feedback si-
gnal.
The line fuses and feeder components should be selected and dimensioned
according to the regulations as specified in Catalog NC60 as well as the Confi-
guration Manual.
Main switch –Q0 is used as line disconnection device according to EN
60204–1:2006 and is not considered in the sense of functional safety.
There is no electrical isolation from the line supply with the Safe Torque Off
function. As a consequence, this function does not represent a protective devi-
ce against electric shock.
The safety functions integrated in the SINUMERIK 840D pl (SINUMERIK Safety
Integrated) in conjunction with the SIMODRIVE 611D modules are not part of
this documentation.
The CNC control modules SINUMERIK 840D have no influence on the evalua-
tion of the safety functions.
© Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
Designation according
to IEC 61800–5–2
STO SH
STOP A
SS1 ext. STOP B
9 Cabinet Design and EMC
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designation description
Safe standstill
Pulse inhibit/
start inhibit
Stop Category 1
Fast stop
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