Siemens simovert masterdrives Compendium

12.2010 Configuration and Connection Examples
Siemens AG 6SE7087-6QX70 (Version AM)
SIMOVERT MASTERDRIVES Compendium Motion Control 2-37
In this example, the subsystem EVALUATE is provided by a SIRIUS
3TK3828 safety switching device. The safety switching device features
instantaneous and time-delayed electromechanical enabling circuits.
Parameter Value Comment
Safety switching devices 3TK2828 -A2
PFH
d
2.7 x 10
-9
/ h Specified by manufacturer
Service life T1 = 20 years Specified by manufacturer
Instantaneous enabling circuits
Performance Level PLe with Category 4
Time-delayed enabling circuits
Performance Level PLd with Category 3
Result
PFH
d
2.7 x 10
-9
/ h
)2A(PFHdPFHd −=
Performance Level PLd with Category 3
The subsystem REACT is formed by two channels. The first channel
consists of the safety relay –K1. The second channel consists of the
line contactor –K2 and the contactor relay –K3. Both channels are de-
energized simultaneously by safety switching device –A1 during an
Emergency Stop.
In this example, the subsystem REACT is formed by two channels with
different request rates for each channel. A dangerous fault in channel 1
causes an instantaneous request from channel 2.
The components -K1 and –K3 are tested every time –A1 or
–A2 starts. The contactor –K2 is tested every time –A1 starts.
Accumulation of faults in channel 2 between two consecutive actuations
of the Emergency Stop button is not detected.
♦ The structure conforms to fundamental and proven safety principles
and the requirements of Category B. Protective circuits are
provided.
♦ The safety function always remains operative when a component
fails. Component failure is detected.
This structure corresponds to Category 3 in accordance with EN ISO
13849-1:2008 /R3/.
Subsystem
EVALUATE
Subsystem REACT

Siemens simovert masterdrives Specifications

General

Brand	Siemens
Model	simovert masterdrives
Category	DC Drives
Language	English