Siemens SIRIUS 3SK1211-2BB40: 24V DC Safety Relay Output Expansion
Siemens SIRIUS 3SK1211-2BB40 Safety Relay, 24V DC
The Siemens 3SK1211-2BB40 is a SIRIUS 3SK1 series safety relay output expansion module designed to extend the output capabilities of basic safety relay units. Operating at 24V DC, it provides four normally open (NO) safety contacts and one normally closed (NC) signaling contact. The module features spring-type terminals for secure connections and is suitable for DIN rail mounting. It is engineered to meet high safety standards, making it ideal for applications requiring reliable safety control expansion.
This output expansion module is certified to SIL 3 (IEC 61508), PL e (EN ISO 13849-1), and Category 4, ensuring robust safety performance. The spring-loaded terminals allow for quick installation, reducing setup time in industrial control systems. Its compact 22.5 mm width also contributes to space-saving panel designs.
Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3SK1211-2BB40. Rely on us for your industrial automation needs and ensure your safety systems are up to par.
| Supply Voltage | 24V DC |
| Safety Outputs | 4 NO |
| Signaling Output | 1 NC |
| Terminal Type | Spring-loaded (push-in) |
| Mounting | DIN rail |
| IP Rating | IP20 |
| Compliance | SIL 3, PL e, Category 4 |