9.4 Application Examples; Emergency Stop At A Converter " Ss1 - Siemens 6SN1123-1AA00-0DA2 Configuration Manual

9 Cabinet Design and EMC

9.4 Application examples

9.4 Application examples
General
EMERGENCY STOP at a converter → SS1
9.4.1
Requirement
Assumption
9-354
For all SIMODRIVE devices the basic principle of the safety–related circuit is
the same. However, the different devices can have different terminal designa-
tions. The following circuit examples can be used, in an adapted form, for all
SIMODRIVE infeeds and drives. The specifications to prove the Performance
Level can be kept.
For reasons of transparency, in the following examples, only the safety–related
terminals are connected. To move the drives, all of the necessary enable termi-
nals must be supplied.
In the following examples, power contactors with mirror contacts as well as con-
tactor relays with positively–driven contacts are used. For reasons of simplicity,
the mirror contacts of the power contactors are designated as standard as posi-
tively–driven contacts.
Table 9-4 Parameter definition acc. to EN ISO 13849–1:2008
Definition
B Lifetime of products where up to 10 % of the product range fails in a
10d
"dangerous" fashion (dangerous failure)
CCF Common cause failure
DC Diagnostic coverage level
DC Average diagnostic coverage level
avg
d Average operating time in days per annum
op
MTTF Mean time to a dangerous failure
d
n Average frequency of actuation per annum
op
PFH Probability of a dangerous failure per hour for continuous use
d
PL Performance Level, which specifies the capability of the safety–related
parts of a control
SRP/CS Part of a control, which responds to safety–related input signals and
generates safety–related output signals
The supplementary safety function EMERGENCY STOP results in the drive
being safely stopped in a controlled fashion. After the stopping time has expi-
red, the drive is safely switched into a no–torque condition.
The EMERGENCY STOP pushbutton is actuated 1x per month.
. As a result of the risk assessment, the required Performance Level for the sa-
fety function is defined to be PLr = d.
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
Description
© Siemens AG 2012 All Rights Reserved
02.12
05.01