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Siemens 3TK2827-2BB40 SIRIUS Safety Relay - 24V DC, Spring Terminal

Siemens 3TK2827-2BB40 SIRIUS safety relay with spring terminals.

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ManufacturerSiemens
Part number3TK2827-2BB40
Voltage 24 V DC
Width 45 mm
Terminal Type Spring-type
EC Instantaneous 2 NO
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12-month warranty
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24V DC operation Spring-type terminal connection Extended delay adjustment (0.5-30s) Monitored start capability High safety integrity (SIL 3/2, PL e/d) 45mm compact design

The Siemens 3TK2827-2BB40 is a SIRIUS safety relay designed for demanding safety applications. This 24V DC unit features a 45mm width and utilizes tool-free spring-type terminals for quick and secure connections. It offers 2 instantaneous normally open (NO) enabling circuits and 2 delayed normally open (NO) enabling circuits with a delay adjustable from 0.5 to 30 seconds. A 1 normally closed (NC) safety circuit is provided for monitored start functionality.

This safety relay is ideal for applications where reliable safety monitoring is critical, including emergency stop systems, safety gates, and light curtains. It finds use in various industrial sectors such as food and beverage processing, packaging machinery, and chemical plants.

Stanlo Automation, a proud veteran-owned business, specializes in providing high-quality surplus industrial automation parts. The Siemens 3TK2827-2BB40 is among our offerings, ensuring you can source essential safety components with confidence and efficiency, minimizing downtime and maximizing operational safety.

Voltage24 V DC
Width45 mm
Terminal TypeSpring-type
EC Instantaneous2 NO
EC Delayed2 NO (0.5-30 s)
SC1 NC
Monitored StartYes
SIL3/2
PLe/d
Emergency stop circuits
Safety gate monitoring
Light curtain integration
Machine safeguarding
Industrial automation
Packaging machinery
General industrial control panels
Siemens 3TK2827-2BB40
This is a specific model and does not have a direct replacement listed as standard. Consult Siemens documentation for upgrade paths.
Expert tip
The spring-type terminals offer vibration resistance and faster installation compared to screw terminals, making it suitable for high-vibration environments.
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What is the adjustable delay range for the Siemens 3TK2827-2BB40 safety relay?
The Siemens 3TK2827-2BB40 safety relay allows for an adjustable delay on its delayed enabling circuits ranging from 0.5 seconds up to 30 seconds.