SIEMENS 3TK2827-1AL20 Used Working SIRIUS Safety Safety Relay

Product Overview

The Siemens 3TK2827-1AL20 is a high-reliability SIRIUS Safety Relay designed for the monitoring of safety circuits in industrial environments. This specific model features Time-Delayed enabling circuits, making it ideal for applications that require a controlled shutdown or delayed stop, such as ensuring a machine has come to a complete standstill before a guard is unlocked. As a Used Working unit, it provides a cost-effective solution for maintaining Category 4 (EN 954-1) safety standards in existing control panels and manufacturing lines.

Key Features

• Configurable Time Delay: Equipped with adjustable delay settings (0.05s to 3s) for the enabling circuits, allowing for precise control over safety-related shutdown sequences.
• Multi-Functional Monitoring: Suitable for monitoring Emergency Stop buttons, safety switches, and interlocking devices.
• High Safety Integrity: Designed to meet high safety standards, supporting systems up to SIL 3 (IEC 61508) or Performance Level e (ISO 13849-1).
• 230V AC Supply: Optimized for high-voltage control circuits, eliminating the need for additional step-down transformers in standard AC panels.
• Redundant Design: Features internal self-monitoring and redundant contact logic to ensure the safety function is performed even in the event of a single component failure.
• Compact Housing: The 45mm wide enclosure is designed for standard 35mm DIN rail mounting, saving valuable space in dense electrical cabinets.

Item Condition (Used Working)

• Functional Status: Used Working. The relay has been professionally pulled from a functional safety system. Both the instantaneous and time-delayed contacts have been tested for proper switching and timing accuracy.
• Physical State: Good industrial condition. The terminal screws are clear and turn freely. The front adjustment dials for the time delay are intact and fully functional.
• Technical Integrity: LED indicators for Power, Channel 1, and Channel 2 have been verified. The unit is free of internal rattling or signs of electrical overheating.
• Note: As with all safety components, a full functional test of the safety loop is required after installation to ensure compliance with local safety regulations.

Package Includes

1. 1 x Siemens 3TK2827-1AL20 SIRIUS Safety Relay (With Time Delay)
2. Attached screw terminal blocks