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Siemens SIRIUS 3RK3251-2AA10 Expansion Module for Safety Systems

Siemens SIRIUS 3RK3251-2AA10 Expansion Module for Safety Systems.

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ManufacturerSiemens

Part number3RK3251-2AA10

Part Number 3RK3251-2AA10

Manufacturer Siemens

Series SIRIUS 3RK3

Type Expansion Module

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Expands safety system I/O Configurable via MSS ES High safety integrity (SIL 3, PL e) 24V DC operation Spring-loaded terminals 45 mm width

Product description

The Siemens 3RK3251-2AA10 is an expansion module for the SIRIUS 3RK3 modular safety system. It is designed to extend the functionality of the base safety device, offering 4/8 safety-related outputs (F-RO) and operating at 24 V DC with a 2 A current rating. Configuration is managed via MSS ES software, and it features spring-loaded terminals for easy connection.

This expansion module is ideal for safety applications requiring increased I/O, such as in manufacturing plants, machine building, and industrial automation. It supports up to SIL 3 (IEC 61508) and Performance Level e (ISO 13849-1), ensuring high levels of functional safety.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RK3251-2AA10. Source your safety system components from Stanlo for reliable solutions and dedicated customer support.

Technical specifications

Part Number	3RK3251-2AA10
Manufacturer	Siemens
Series	SIRIUS 3RK3
Type	Expansion Module
Safety Outputs	4/8 F-RO
Voltage	24 V DC
Current	2 A
SIL	3
PL	e
Terminal Type	Spring-loaded

Common applications

Machine safety

Industrial automation

Manufacturing lines

Robotics

Conveyor systems

Safety control

Compatible systems

Siemens SIRIUS 3RK3 modular safety system

Also known as

Siemens 3RK3 Expansion Unit 3RK32512AA10 Sirius Safety Expansion

Technical note

Expert tip

This module requires a base unit from the 3RK3 series and is configured using Siemens' MSS ES software.

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Frequently asked questions

What is the maximum safety integrity level achievable with the Siemens 3RK3251-2AA10 expansion module?

The Siemens 3RK3251-2AA10 expansion module supports up to Safety Integrity Level 3 (SIL 3) according to IEC 61508 and Performance Level e (PL e) according to ISO 13849-1. This indicates a very high degree of reliability for safety-critical functions.