SIEMENS 3RK1205-0BE00-0AA2

Siemens 3RK1205-0BE00-0AA2 SIRIUS AS-i Safety Module

Description

The Siemens 3RK1205-0BE00-0AA2 is a failsafe digital input module from the SIRIUS series, designed for use with AS-Interface (AS-i) networks. It provides a secure method for connecting safety-related sensors, such as emergency stop pushbuttons, safety switches, or light curtains, to a safety controller or monitor. With its compact 22.5mm width, it is ideal for space-saving installations in control cabinets.

Specifications

• Manufacturer: Siemens
• Product Line: SIRIUS
• Model Number: 3RK1205-0BE00-0AA2
• Product Type: AS-i F-Module S22.5
• Number of Failsafe Inputs: 2 (2F-DI)
• Communication Protocol: AS-Interface
• Achievable Safety Level: Up to SIL 3 (IEC 61508), PLe (ISO 13849-1)
• Supply Voltage: via AS-i bus
• Enclosure Width: 22.5 mm

Label Info

• Model: 3RK1205-0BE00-0AA2
• EAN: 4011209590427
• Date Code: G/120402 (Year 2012)

Application

This module is typically used in industrial automation for machine safety applications, including packaging machinery, material handling systems, and production lines where decentralized safety I/O is required.

Country of Origin

Made in Germany.

CO2 Impact

Choosing this reused component over a new one prevents the emission of approximately 4.8 kg of CO2, contributing to a more sustainable industrial environment.

Availability

This is an obsolete product but is available as a spare part. Order now from spareparts2day for expert support and fast delivery.

FAQ

Question?

What is the maximum safety level achievable with the 3RK1205-0BE00-0AA2 module?

The module can be used in safety circuits up to SIL 3 according to IEC 61508 and PLe according to ISO 13849-1, provided it is correctly integrated with an AS-i safety monitor.

Question?

Can this module be used in a standard AS-i network without a safety monitor?

No, to achieve the safety function, this F-DI module must be used in an AS-Interface network that includes a compatible AS-i Safety Monitor (e.g., a Siemens 3RK3 or a safety PLC with AS-i master).

Question?

What does the ‘SO.B.F’ designation on the label mean?

This is a Siemens-specific code. ‘SO’ stands for ‘Standard housing’, ‘B’ indicates the width of 22.5 mm, and ‘F’ signifies it is a Failsafe (safety-related) device.

Last Update: March 13, 2026

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