Siemens MSS Basic Central Module, screw

Range: Sirius
Series: 3RK3
Number of safety inputs: 8
Number of safety outputs: 2
Safety category: 4
SIL: SIL 3
Supply voltage: 24 V DC
Protection class: IP20
Dimensions: 113 x 45 x 124 mm

The modular safety system Sirius 3RK3 is a freely parameterizable modular safety relay. It is suitable for safety-oriented applications up to category 4 according to EN 954-1, power level e according to ISO 13849-1, or SIL 3 according to IEC 62061, depending on external circuit design. This modular safety relay enables the interconnection of several safety applications. The comprehensive fault and status diagnosis allows for identifying faults in the system and locating signals from sensors, resulting in shorter system downtimes.

The central base unit 3RK3 is used where more than three safety functions need to be analyzed, and where parameterization of the wiring of safety relays would be too time-consuming and costly. This safety relay receives inputs, controls outputs, and communicates with high-level controllers via an interface module. The entire security program of an application is processed in the central unit. At the lowest configuration level, the 3RK3 central basic unit functions without the expansion modules, which can be optionally connected.

Features include:

• 8 safety-relevant sensor inputs
• 1 safety-relevant relay output
• 1 safety-relevant semiconductor output
• Up to 7 expansion modules can be connected
• Cyclic data exchange via PROFIBUS: up to 32 bit
• High flexibility and planning reliability due to modular design
• More space in the control cabinet and lower costs due to a highly modular quantity structure
• Increased functionality and time savings through a parameterizable software system
• Extensive on-site diagnostics and project documentation with the MSS ES software
• Improved system diagnostics and higher system availability thanks to data exchange via PROFIBUS.