Brand: Siemens
Part No: 3RK3221-2AA10
Type: SIRIUS Expansion Module 24V DC
System: Modular safety system 3RK3
Condition: Used
Siemens 3RK3221-2AA10 is a SIRIUS expansion module compatible with the modular safety system 3RK3. It supports 2/4 F-DI and 1/2 F-RO channels, operates at 24 V DC/1 A, and is configurable via MSS ES with a 22.5 mm spring-loaded terminal up to SIL 3 (IEC 61508) and Performance Level e (ISO 13849-1).
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✓ Ships within 24 hours from stock
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✓ Includes 30-day warranty

Photos show the actual item. If multiple units are available, all are identical in condition and specifications.
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This product is used in industrial automation systems to support reliable operation and integration within control and monitoring environments.
It is commonly applied in PLC systems, control panels, and automation processes where stability and long-term performance are required.
Suitable for maintenance, replacement, or expansion of existing industrial automation systems.


















