3RK3231-2AA10 SIEMENS

3RK3231-2AA10 Siemens Basis unit

Brand：SIEMENS Model number：3RK3231-2AA10

Country of origin: Germany Product weight：0.55kg

HS code：8517623990

Product Details：

Product Dimensions：

The 3RK3231-2AA10 serves as the "brain" of a modular safety system. Unlike standard safety relays that handle a single function, this Advanced Central Unit is fully programmable using the SIRIUS MSS ES software. It allows for the integration of multiple safety sensors, such as emergency stop buttons, light curtains, and protective door switches, into a single cohesive safety strategy. The "Advanced" designation indicates that this unit supports an interface for connection to a fieldbus (like PROFIBUS or PROFINET) via an optional interface module, allowing for diagnostic data to be sent to a standard PLC or HMI.

Product Parameters

Product Brand Name: SIRIUS
Product Designation: Modular Safety System 3RK3 Central Unit Advanced
Supply Voltage: $24 \text{ VDC}$ (with a permissible range of $20.4 \text{ VDC}$ to $28.8 \text{ VDC}$ )
Digital Inputs: 8 safety-related inputs
Digital Outputs: 1 safety-related relay output and 1 safety-related electronic (solid-state) output
Test Pulse Outputs: 2 outputs for cross-circuit detection and sensor monitoring
Number of Interfaces: Connection for up to 9 expansion modules (I/O or functional)
Degree of Protection: IP20 (intended for control cabinet installation)
Mounting Type: Standard $35 \text{ mm}$ DIN rail or screw mounting
Dimensions: Width $45 \text{ mm}$ , Height $111 \text{ mm}$ , Depth $124 \text{ mm}$
Safety Integrity Level (SIL): Suitable for applications up to SIL 3 (IEC 61508)
Performance Level (PL): Suitable for applications up to PL e (ISO 13849-1)

Product Advantages

One of the most significant advantages of the 3RK3231-2AA10 is its Scalability. Being a modular system, you can start with the central unit and add expansion modules as your machine's safety requirements grow, which is far more cost-effective than wiring multiple individual safety relays. The Graphical Programming via MSS ES software simplifies the creation of complex safety logic using drag-and-drop function blocks, significantly reducing engineering time.

The unit also provides Enhanced Diagnostics. When coupled with a fieldbus interface, it can transmit detailed status information to a higher-level control system, allowing operators to quickly identify which safety sensor was tripped. Furthermore, the Compact Design of the $45 \text{ mm}$ wide housing saves valuable space in the electrical cabinet while still providing a high density of safety-related inputs and outputs.

Important Considerations and Precautions

When implementing the 3RK3231-2AA10, it is critical to perform a Complete Risk Assessment of the machinery to ensure the programmed logic meets the required safety integrity level. During installation, the Polarity of the $24 \text{ VDC}$ Supply must be strictly observed; reversing the polarity can damage the internal electronic components.

To ensure effective Cross-Circuit Detection, it is highly recommended to use the provided test pulse outputs for monitoring dry-contact sensors like E-stops. If you are using the unit in a high-vibration environment, ensure the DIN rail clips are securely engaged and consider using end brackets. Finally, always Back up the Configuration File created in the MSS ES software; the system configuration is stored on a removable data medium (Memory Module), which should be handled with care to prevent data loss during maintenance.

Product Applications

The Siemens 3RK3231-2AA10 is ideal for any application where multiple safety functions must be synchronized or monitored simultaneously.

Machine Tooling: Managing emergency stops, interlocked guards, and enabling switches for CNC machines.
Packaging Lines: Coordinating multiple light curtains and safety doors across long conveyor systems and palletizers.
Robotic Cells: Integrating robot safety signals with peripheral safety equipment like laser scanners and pressure mats.
Material Handling: Ensuring safe operation of high-speed sorting systems and automated storage/retrieval systems (ASRS).
Automotive Assembly: Protecting operators in complex assembly stations where multiple personnel interact with automated machinery.

6ES7972-0CB20-0XA0 SIEMENS

We have the same series of models in stock. If you don't find the model you need, please contact us and we will provide you with an official quotation！

SIEMENS6SE6440-2UD13-7AA1

SIEMENS6SL3224-0BE37-5AA0

SIEMENS6DD1684-0BC0

SIEMENS6DD1684-0AH0

SIEMENS6AV6542-0CA10-0AX0

SIEMENS3RT1044-1AG20

SIEMENS6AV6647-0AH11-3AX0

SIEMENS3RT2017-1AF01

SIEMENS6ES7321-1CH20-0AA0

SIEMENS6ES7331-7HF01-0AB0

SIEMENS6ES7195-7HA00-0XA0

SIEMENS6SE70386GL841JA1