SIEMENS
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Siemens D 31 · 2015
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Function
Highlights
Safety Integrated
SINAMICS S110
The integrated safety functions of SINAMICS S110 provide
highly effective application-oriented protection for personnel
and machinery.
SINAMICS S110 offers Extended Functions (SS2, SOS, SLS,
SDI, SSM) in addition to Basic Functions (STO, SS1, SBC).
The Safety Integrated functions are implemented electronically
and therefore offer short response times compared to solutions
with externally implemented monitoring functions.
The Safety Integrated functions are fully integrated in the drive
system. They can be activated via fail-safe digital inputs on the
CU305 Control Unit or over PROFINET or PROFIBUS with
PROFIsafe.
As an alternative to controlling via terminals and/or PROFIsafe,
there is also the option to parameterize several safety functions
without selection. In this mode, after parameterization and a
POWER ON, these functions are permanently selected.
Example:
"SLS without selection" can be used, for example, to monitor the
maximum velocity to prevent the drive from exceeding a mechan-
ical speed limit. For this purpose, using the "without selection"
function, an F-DI does not have to be used; an F-CPU is also not
required.
Safe speed/position sensing
Incremental encoders or absolute encoders can be used for
safe sensing of the position values on a drive. Safe actual value
sensing relies on redundant evaluation of the incremental tracks
A/B that supply sin/cos signals of 1 V
pp
. Only encoders of the
type whose A/B track signals are created and processed using
purely analog techniques can be used.
The encoder signals can be input via the Sensor Modules. As an
alternative, motors with an integrated DRIVE-CLiQ interface can
be used. The speed or position actual values are generated
directly in the motor as safe values and are transferred to the
Control Unit over safe communication via DRIVE-CLiQ.
The encoder must be mechanically attached in such a manner
that the encoder shaft is unable to unplug or slide off. For notes
on this, see IEC 61800-5-2: 2007, Table D.16.
A list of Siemens motors that fulfill the electrical and mechanical
requirements is available at:
Motors with DRIVE-CLiQ interface are connected directly to the
CU305 Control Unit. A SINAMICS Sensor Module is required to
evaluate the encoder signals of motors without a DRIVE-CLiQ
interface.
Safe actual value sensing without encoder
Some safety functions can also be operated without safety-
capable encoders; implementation effort is minimal. Existing
systems in particular can be updated with safety technology
without the need to change the motor or mechanical system.
The STO function can be used without restriction for all applica-
tions.
The SS1, SLS, SSM and SDI functions are permissible for applica-
tions in conjunction with asynchronous and SIEMOSYN motors
where the load can never cause acceleration. An encoder that is
used for the purposes of motor control has no significance for the
safety functions here.
Licensing
The Safety Integrated Basic Functions do not require a license.
The Safety Integrated Extended Functions do require a license.
It is of no consequence here which safety functions are used and
how many. The license can be ordered as an option with the
memory card. Alternatively, a single-user license can also be
purchased.
Safe Brake Relay
The Safe Brake Control (SBC) function requires a Safe Brake Re-
lay. The Safe Brake Relay allows safe control of electro-mechan-
ical motor brakes.
The 24 V DC solenoid of the motor brake is directly connected to
the Safe Brake Relay. External surge suppressors are not re-
quired. The cable harnesses for connection to the Power Module
are included in the scope of supply.
With the Safe Brake Relay function, the brake is controlled in ac-
cordance with IEC 61508 SIL 2 and EN ISO 13849-1 PL d and
Category 3.
© Siemens AG 2014