SINAMICS S120 Safety Integrated
Within the SINAMICS drive family, SINAMICS S120 is the drive system for motion control applications.
It has an extensive safety package that helps to protect personnel as well as machines. This safety package is extremely efficient and cost effective as the safety functions are completely integrated into the drive system. Not only this, your machine can be safely and practically operated under all of the relevant operating conditions. For instance, in the setting-up and test modes with the protective door open. The safety functions have been certified by the Berufsgenossenschaft [Germany regulatory body responsible for safety at work] and the TÜV [German Technical Inspectorate]. These safety functions fulfill the requirements of Safety Integrity Level 2 acc. to EN 61508 and Performance Levels d acc. to EN ISO 13849-1.
Included in the function scope are the following, e.g.:
- Functions to safely stop drives
- Functions to safely monitor motion
The type test was carried-out by the Berufsgenossenschaftliche Institut für Arbeitssicherheit (BIA) [Germany regulatory body] and by the TÜV [German Technical Inspectorate].
Product features
- Functions to protect personnel and machines
- Short response times as it is integrated in the drive system
- Can be used in all operating modes
- Replaces external electromechanical devices
- Certified according to EN 61508, SIL 2 and EN ISO 13849-1, PL d
Safety Integrated functions for SINAMICS S120
The safety functions of SINAMICS S120 are available in all operating modes and can communicate with the process via safety-relevant input/output signals. As an alternative, communications is also possible via the fieldbus with safety-relevant PROFIsafe profile.
SINAMICS S120 has the following safety functions integrated in the drive:
| Short description |
Description |
| STO Safe Torque Off |
The drive pulses are cancelled and therefore the energy feed to the drive is safely and electronically disconnected. |
| SBC - Safe Brake Control |
A motor brake is controlled through two channels |
SS1 - Safe Stop 1
SS2 - Safe Stop 2 |
When a monitoring function or a sensor responds (e.g. light barrier) this function safely brings drives to a standstill (zero speed). |
| SOS - Safe Operating Stop |
Monitors the drives for standstill. The drives remain completely functional in closed-loop position control. |
| SLS - Safety Limited Speed |
Monitors configurable speed limit values, for example, when setting-up without an agreement button. |
| SSM - Safe Speed Monitor |
Supplies a safety output signal if the drive speed lies below a configurable limit value. |
Customer benefits
- High degree of safety:
Safety functions are seamlessly implemented in SIL 2 (EN 61508) and PL d (EN ISO 13849-1)
- High degree of flexibility:
Practical safety and operator concepts can be realized
- High degree of cost effectiveness:
Hardware and installation costs are reduced
- Higher degree of availability:
Electromechanical switching elements that are prone to faults are eliminated
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