Siemens 3TK2820-1CB30 SIRIUS Safety Relay - 24V AC/DC
Siemens SIRIUS safety relay with relay enabling circuits, 24V AC/DC.
The Siemens 3TK2820-1CB30 is part of the SIRIUS safety relay family, featuring relay enabling circuits (EC). It operates on 24 V AC/DC and has a slim 22.5 mm profile. This basic unit includes 3 instantaneous normally open (NO) EC contacts and 1 normally closed (NC) safety contact (SC). It supports auto-start and monitored start functions, achieving a maximum error category of 4 (EN 13849-1), PL 'e', and SIL 3.
This safety relay is suitable for a broad spectrum of industrial safety applications, including emergency stop circuits, light curtains, and safety gates. It is commonly deployed in manufacturing plants, machine tools, and automation systems where versatile voltage input and compact design are beneficial.
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| Voltage | 24 V AC/DC |
| Width | 22.5 mm |
| Terminals | Screw |
| EC Instantaneous | 3 NO |
| EC Delayed | 0 |
| SC | 1 NC |
| Auto-start/Monitored start | Yes |
| Max Error Category EN 13849-1 | 4 |
| PL | e |
| SIL | 3 |