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Siemens 3TK2828-2BB40 SIRIUS Safety Relay - 24V DC

Siemens 3TK2828-2BB40 SIRIUS Safety Relay

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ManufacturerSiemens

Part number3TK2828-2BB40

Voltage 24V DC

Width 45 mm

Terminals Spring-type

EC Instantaneous 2 NO

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12-month warranty

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Veteran-owned

CAGE: 9NK75

2 NO instantaneous EC 2 NO delayed EC (0.5-30s) 1 NC SC Autostart functionality Protective door monitoring High safety ratings (SIL 3/2, PL e/d)

Product description

The Siemens 3TK2828-2BB40 is a SIRIUS safety relay designed for robust industrial safety applications. Powered by 24V DC, this unit features spring-type terminals for straightforward installation. It offers 2 normally open (NO) instantaneous enabling circuits (EC) and 2 normally open (NO) delayed enabling circuits with a configurable delay of 0.5 to 30 seconds. Additionally, it includes 1 normally closed (NC) signaling circuit (SC).

This safety relay is engineered to meet high safety standards, achieving a maximum SIL of 3/2 and PL of e/d. Its autostart functionality and capability for protective door monitoring make it a crucial component for safeguarding machinery and personnel.

Stanlo Automation, a veteran-owned surplus parts distributor, is your trusted source for industrial automation components. We ensure quality and reliability, providing you with the parts you need to maintain efficient operations.

Technical specifications

Voltage	24V DC
Width	45 mm
Terminals	Spring-type
EC Instantaneous	2 NO
EC Delayed	2 NO (0.5-30s)
SC	1 NC
Autostart	Yes
SIL	3/2
PL	e/d
Mounting	DIN rail

Common applications

Machine safety

Emergency stop systems

Safety interlocks

Industrial control

Press control

Compatible systems

Integrates with safety sensors, E-stop buttons, and light curtains.

Also known as

Siemens SIRIUS 3TK28 Safety Relay 24V DC Safety Relay

Replaces / compatible with

This unit is a component within the Siemens SIRIUS safety relay family and may replace or be compatible with other SIRIUS safety devices.

Technical note

Expert tip

The delay function is ideal for applications requiring a specific time to disengage safety circuits after a trigger.

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Frequently asked questions

What is the maximum delay time for the Siemens 3TK2828-2BB40 safety relay?

The Siemens 3TK2828-2BB40 safety relay offers a delayed release time adjustable from 0.5 to 30 seconds, allowing for precise control in various safety applications.