The Siemens SIRIUS safety relay 3TK2821-1CB30 is designed to provide reliable protection in industrial systems. This device supports 24 V AC/DC power supply and is equipped with screw terminals for easy connection. Key features include three instantaneous normally open contacts (3 NO) and one normally closed contact (1 NC) for monitoring circuit status. The relay supports auto start and manual start, providing flexibility and ease of operation.
The maximum achievable safety level (SIL) for the basic device is SIL 1, the performance level (PL) is c, and when used as an extension, it is possible to achieve SIL 3 and PL e. This product is no longer in production and can be replaced by 3SK1111-1AB30 or 3SK1211-1BB40/3SK1211-1BB00.
Characteristics:
- Power: 24 V AC/DC
- Terminals:Screw
- Instant contacts: 3 NO
- Delayed contacts: 0 NO
- Control contacts: 1 NC
- Weight: 0.247 kg
- Packaging dimensions: 28 x 106.5 x 124 mm
This product is ideal for use in industrial systems where a high level of safety and reliability is required.
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