3SK1211-1BB40
Siemens Safety Relay Expansion Module 3SK1211-1BB40
Siemens
Siemens Safety Relay Expansion Module 3SK1211-1BB40
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Specifications
| Brand | Siemens |
|---|---|
| Model Number | 3SK1211-1BB40 |
| Official Product Name | SIRIUS 3SK1 Safety Relay Output Expansion Module |
| Applicable System | Machine Safety / Emergency Stop |
| Product Type | Safety Relay Expansion Module |
| Equivalent Standard | Contact us for cross-reference and alternative models |
| Product Status | Available |
| Model | 3SK1211-1BB40 |
| Family | SIRIUS 3SK1 |
| Supply Voltage | 24 V DC |
| Contacts | 4 NO + 1 NC (safety-rated) |
| Mounting | DIN rail |
| Dimensions (HxWxD) | 22.5 x 100 x 121.6 mm |
| Country of Origin | Germany |
| Weight | Contact us for exact specifications |
| Material | Contact us for exact specifications |
Product Description
It extends the safe output capacity of a 3SK1 safety relay base unit. Housed in a compact 22.5 mm wide DIN-rail enclosure measuring about 22.5 x 100 x 121.6 mm, it adds force-guided safety contacts for emergency-stop and guard monitoring circuits without additional software. Manufactured in Germany, this is a genuine Siemens spare supplied from verified stock. Confirm the base unit and contact requirement before ordering. The Siemens 3SK1211-1BB40 is a SIRIUS 3SK1 safety relay output expansion module with 4 normally-open (NO) plus 1 normally-closed (NC) safety contacts, supplied from 24 V DC.
Basic Product Information
- 4 NO + 1 NC safety-rated, force-guided contacts.
- Operates on 24 V DC.
- Compact 22.5 mm DIN-rail housing.
- Extends 3SK1 base unit safe output capacity.
- Manufactured in Germany; supplied from verified stock.
- Genuine Siemens SIRIUS 3SK1 safety relay output expansion.
Technical Specifications
Version & Model Difference
The 3SK1211-1BB40 is the 24 V DC expansion with 4 NO + 1 NC contacts in the SIRIUS 3SK1 family. Other variants differ in supply voltage and contact configuration; confirm the exact type for your base unit.
Application Scenarios
- Expansion of emergency-stop safety circuits.
- Protective door and guard monitoring outputs.
- Machine safety built on SIRIUS 3SK1 platforms.
- The module is manufactured in Germany and supplied as a genuine Siemens part.
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Frequently Asked Questions
What is the 3SK1211-1BB40?
It is a Siemens SIRIUS 3SK1 safety relay output expansion module with 4 NO + 1 NC safety contacts, supplied from 24 V DC.
What are its dimensions?
It measures about 22.5 x 100 x 121.6 mm in a compact DIN-rail housing.
How does it connect?
It expands a 3SK1 base unit's safe output capacity and requires no extra configuration software.
Where is it made?
The module is manufactured in Germany and supplied as a genuine Siemens part.
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