Siemens SIRIUS Safety Relay for Contactor Monitoring
Siemens SIRIUS safety relay for monitoring enabling circuits.
The Siemens SIRIUS safety relay (Part Number 3TK2850-2AL20) is designed for monitoring safety circuits, specifically for contactor relay enabling circuits (EC). It operates with a 230 V DC power supply and features spring-type terminals for easy connection. This basic device provides 3 normally open (NO) enabling circuit contacts (EC instantaneous) and 0 delayed enabling circuit contacts (EC delayed). It also includes 0 safety contacts (SC). The relay supports autostart or monitored start configurations and achieves a Safety Integrity Level (SIL) of 2 and Performance Level (PL) of d.
This safety relay is crucial for applications requiring reliable monitoring of safety functions, such as emergency stop circuits, safety gates, and light curtains in machinery and industrial automation. Its SIL 2 and PL d ratings ensure a high level of safety for personnel and equipment.
Source your Siemens 3TK2850-2AL20 SIRIUS safety relay from Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts. Ensure your safety systems are robust and compliant with reliable components.
| Part Number | 3TK2850-2AL20 |
| Manufacturer | Siemens |
| Series | SIRIUS |
| Type | Safety Relay |
| Power Supply | 230 V DC |
| Terminals | Spring-type |
| EC Instantaneous | 3 NO |
| EC Delayed | 0 |
| SC (Safety Contacts) | 0 |
| Start Mode | Autostart / Monitored Start |
| SIL | 2 |
| PL | d |
| Width | 90 mm |