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Siemens 3TK2830-1AJ20 SIRIUS Safety Relay - 115V AC

Siemens 3TK2830-1AJ20 SIRIUS Safety Relay

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ManufacturerSiemens

Part number3TK2830-1AJ20

Voltage 115V AC

Width 22.5 mm

Terminals Screw

EC Instantaneous 4 NO

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4 NO instantaneous EC contacts 1 MK feedback/retraction contact 22.5mm width 115V AC operation Expansion unit capability SIL 3 rating

Product description

The Siemens 3TK2830-1AJ20 is a SIRIUS safety relay designed for monitoring safety-related circuits. It operates on a 115V AC supply and features a slim 22.5mm width with screw terminals for secure connections. This expansion unit provides 4 normally open (NO) instantaneous enabling circuits (EC) and no delayed enabling circuits. It also includes one feedback/retraction monitoring contact (MK).

This safety relay is suitable for applications requiring a SIL 3 rating. It is designed to be used as part of a larger safety system, offering expanded capabilities for monitoring and control. The "as basic unit" designation for SIL/PL indicates its performance is determined by the overall system configuration.

As a veteran-owned surplus parts distributor, Stanlo Automation offers reliable industrial automation components. We provide quality surplus parts to keep your systems running efficiently and cost-effectively.

Technical specifications

Voltage	115V AC
Width	22.5 mm
Terminals	Screw
EC Instantaneous	4 NO
EC Delayed	0
MK	1 NC
SIL	3
PL	e
Type	Expansion Unit

Common applications

Machine safety

Industrial control systems

Safety monitoring

Automation panels

Compatible systems

Designed to be integrated into safety circuits with compatible Siemens control systems.

Also known as

Siemens SIRIUS Expansion Unit Safety Relay 115V AC

Replaces / compatible with

This unit is being replaced by devices from the 3SK series. Consult Siemens for exact successor part numbers.

Technical note

Expert tip

As an expansion unit, this relay is designed to augment the functionality of a base safety relay unit in a larger system.

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Frequently asked questions

What type of contacts does the Siemens 3TK2830-1AJ20 safety relay have?

The Siemens 3TK2830-1AJ20 safety relay is equipped with four normally open (NO) instantaneous enabling circuits (EC) and one feedback/retraction monitoring contact (MK).