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Siemens 3TK2842-2BB42 SIRIUS Safety Relay - Extended Delay

Siemens SIRIUS safety relay with electronic enabling circuits, extended delay.

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ManufacturerSiemens

Part number3TK2842-2BB42

Manufacturer Siemens

Part Number 3TK2842-2BB42

Series SIRIUS

Voltage 24 V DC

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CAGE: 9NK75

Electronic enabling circuits Extended adjustable delay time (0.5-30s) Spring-type terminals High safety ratings (SIL 3, PL e) Compact 22.5mm width Monitored start functionality

Product description

The Siemens 3TK2842-2BB42 is a SIRIUS safety relay designed with electronic enabling circuits, operating on 24V DC and featuring spring-type terminals within a 22.5mm housing. This standard device provides one instantaneous enabling circuit (EC) and one delayed EC with a wider adjustable time range of 0.5 to 30 seconds. It is built for monitored start-up and achieves a maximum SIL of 3 and PL of e.

This safety relay is suitable for applications requiring a longer delay function in safety circuits, such as in automated systems, production lines, and robotic cells. Its flexibility in time adjustment and high safety ratings make it a robust solution for various industrial safety needs.

Stanlo Automation, your veteran-owned source for surplus industrial automation parts, offers the Siemens 3TK2842-2BB42. We provide reliable access to essential components for your automation infrastructure.

Technical specifications

Manufacturer	Siemens
Part Number	3TK2842-2BB42
Series	SIRIUS
Voltage	24 V DC
Width	22.5 mm
Terminals	Spring-type
EC Instantaneous	1 HL
EC Delayed	1 HL
Delay Time	0.5...30 s
SC	0
Autostart/Monitored Start	Yes
SIL	3
PL	e

Common applications

Machine safety

Industrial automation

Safety control systems

Long delay safety functions

Automated manufacturing

Packaging machinery

Compatible systems

Safety light curtains Access control systems Machine guarding systems Emergency stop pushbuttons

Also known as

3TK2842-2BB42 Siemens Siemens SIRIUS Safety Relay 30s delay Spring terminal safety relay

Replaces / compatible with

This part is a Siemens SIRIUS safety relay. For specific replacement information, consult the Siemens documentation.

Technical note

Expert tip

The extended delay function is crucial for applications where a sequential safety interlock requires a specific waiting period before activation.

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Frequently asked questions

What is the maximum adjustable delay time for the Siemens 3TK2842-2BB42?

The Siemens 3TK2842-2BB42 safety relay allows for an adjustable delay time ranging from 0.5 to 30 seconds, providing flexibility for applications requiring longer safety response times.