3SK1211-2BB40

The 3SK1211-2BB40 is an output expansion module from the Siemens SIRIUS 3SK1 Advanced series. It provides four normally open enable contacts and one normally closed signal contact, with a rated voltage of 24V DC and a spring-loaded terminal quick-connect design.

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Siemens SIRIUS 3SK1211-2BB40 Safety Relay Output Extension Module Spring Terminal

Product Positioning

The 3SK1211-2BB40 is an output expansion module from the Siemens SIRIUS 3SK1 Advanced series. It features a spring-loaded terminal design and can add four more enable output contacts to a safety relay system.

Core Product Advantages and Features

4 sets of energizing normally open contacts

It provides 4 sets of enable (NO) output contacts, plus 1 set of normally closed (NC) signal contacts, which can monitor the output status.

Spring-type terminal quick connection

Using spring-type terminals, wiring can be completed without screws, making installation and maintenance more time-saving.

Modular expansion architecture

The number of output points can be flexibly expanded by connecting the device connector to the 3SK1 Advanced series basic unit.

Compact housing

The narrow casing design effectively saves installation space inside the distribution panel.

project	Specification
Product Family	SIRIUS 3SK1 Advanced Series
Product Type	Output expansion module (4RO)
Output contacts	4 sets of normally open enable (NO) + 1 set of normally closed signal (NC)
Rated power supply voltage Us	24 V DC
Terminal type	Spring type terminal

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