PROFIBUS with PROFIsafe Profile. PROFIsafe is a profile for PROFIBUS and PROFINET certified according to IEC 61508. With SIL 3 (Safety Integrity Level) or Category 4 according to EN 954-1, PROFIsafe fulfills the highest safety requirements of the process and manufacturing industry. Both safety-oriented and standard communication are possible via one and the same cable.

• PROFIsafe makes PROFIBUS the first failsafe bus to meet the high demands of process and production technology
• PROFIsafe profile is open, allowing the integration of field devices from other manufacturers.
• PROFIsafe is a certified profile for PROFIBUS DP according to IEC 61508 and will soon be available for PROFINET too.
• PROFIsafe fulfills the following safety levels: (1) Safety Integrity Level - SIL 3 (IEC 61508) and (2) Category 4 (EN 954-1)

Automation & machine safety integrated in a single controller. A failsafe, redundant SIMATIC system is based upon a standard CPU S7-414H or S7-417H. For use as failsafe controller, the user can expand the standard CPU to include safety-relevant functions with the S7-F Systems software package. This makes it possible to implement safety-relevant and redundant tasks inexpensively using the same components. For more information on fail-safe PLCs click here.

The CPUs can be expanded with ET 200M and/or ET 200S signal modules. PROFIBUS DP with PROFIsafe profile is used for communication between two failsafe CPUs or between one failsafe CPU and its failsafe I/O.

S7 Distributed Safety Software for fail-safe SIMATIC systems.

• Uniform approach and environment for engineering both safety and standard automation.
• Standard IEC 61131-3 ladder diagram and function block diagram editors of Step 7, supplemented by a TUV-approved safety function block library.
• Automatic safety checks including additional fail-safe blocks for error recognition and handling.
• software errors and hardware faults trigger corresponding reactions, keeping the fail-safe system in a safe state.
• Meets all IEC 61508 to SIL3 and EN 954-1 to Category 4.

The ET 200M I/O system – The modular expansion system. The ET 200M failsafe input and output modules are used for distributed expansion of the SIMATIC S7-400FH.An ET 200M station may contain both failsafe and standard input and output modules.

The ET 200S I/O system – The bit-granular expansion system. In addition to the failsafe input and output modules, ET 200S products include failsafe motor starters, power modules, contact multipliers and interface modules. The ET 200S is used for distributed expansion of the SIMATIC S7-400F/FH.

An ET 200S station can contain both failsafe and standard input and output modules. Compliance with SIL 3/Category 4 is attained through the use of a type PM-E 24 V DC/120/230 V AC power module. SIL3/Category 4 is attained by using the type PM-E 24 V DC/120/230 V AC power module in additional use with the failsafe I/O modules in the voltage group of the ET 200S.

SIMATIC ET 200S. In case of an emergency stop, the motor is controlled by the motor starter contactor. If the contactor fails, an overvoltage release which trips the integrated power breaker is actuated via a redundant disconnection facility. Thanks to the integrated safety disconnection, the safety motor starter increases plant availability to a considerable degree.

Whether minimum protection or maximum safety - with our safety-oriented, communication-capable Safety Motor Starter solutions cover every safety application. Depending on the requirement, there are two ways to switch off safely:

1.Using a Safety Motor Starter Solution local with an integrated safety switching device is the best and extremely cost-effective solution for simple, local safety applications and is especially suitable for switching off in groups.

2.The use of Safety Motor Starter Solution PROFIsafe facilitates more complex, safety-oriented applications which are implemented at the control level.