Siemens 3SK1211-1BB40 Safety Relay
The Siemens 3SK1211-1BB40 is a highly reliable SIRIUS 3SK1 output expansion module designed for demanding industrial safety applications. Housed in a space-saving compact enclosure, this advanced safety relay module features a versatile mode selection switch that allows operators to easily configure the unit for either DELAYED or UNDELAYED operational states. It seamlessly integrates with SIRIUS Advanced basic units to safely expand the number of enabling circuits, ensuring maximum protection and safety compliance for both personnel and automated machinery.
Technical Specifications:
- Brand: Siemens
- Model: 3SK1211-1BB40
- Product Series: SIRIUS 3SK1 Output Expansion
- Control Supply Voltage: 24 V DC
- Operating Modes: Selectable (Delayed / Undelayed)
- Connection Type: Screw Terminals

| Brand | Siemens |
|---|---|
| Model | 3SK1211-1BB40 |
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ENERAL DELIVERY INFORMATION
Orders will be processed and shipping during standard working hours (0830 – 1700 GMT+8) Monday to Friday (excluding Bank Holidays)
On rare occasions, your order may be handled and/or processed on a Saturday. However, we are unable to ship items on weekends, therefore any orders dealt with on the weekend will be send out the next following working day.
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Any orders placed after the cut-off will ship the next working day assuming all parts are in stock and ready for dispatch.
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Siemens 3SK1211-1BB40 Safety Relay
Upgrade your industrial safety systems with the Siemens 3SK1211-1BB40 SIRIUS 3SK1 safety relay. This compact output expansion module features a 24V DC supply and a selectable DELAYED/UNDELAYED mode switch for versatile, reliable machinery protection.

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