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Siemens 3TK2856-1BB40

SIRIUS SAFETY RELAY WITH AUXILIARY CONTACTOR RELEASE CIRCUIT
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The Siemens SIRIUS 3TK2856-1BB40 safety relay is designed for reliable safety-related control tasks in industrial automation systems. This expansion unit with auxiliary contactor release circuit supports DC 24 V operation and is suitable for integration into machine safety concepts where dependable signal evaluation and controlled shutdown are essential.


The relay features screw terminals for secure and proven wiring in control cabinets. It provides instant auxiliary contactor release with multiple safety contacts, supporting safe switching operations in combination with SIRIUS safety systems. With its compact design, it fits easily into standard panel layouts while maintaining high operational reliability.


As part of the Siemens SIRIUS range, this safety relay meets established industry standards for functional safety, with defined Performance Level and SIL capabilities depending on the overall system design. Please note that this product is phase-out and recommended for maintenance, replacement, or existing installations where compatibility is required.

SIRIUS SAFETY RELAY WITH AUXILIARY CONTACTOR RELEASE CIRCUIT (RC), DC 24V, 90.0MM, SCREW TERMINAL, RC INSTANT.: 6S, 1HL, RC DELAYED: 0, MC: 1NC, EXPANSION UNIT, MAX. ACHIEVABLE PL: AS GG MAX. ACHIEVABLE SIL: AS GG
General
Manufacturer:
Siemens
Range:
Sirius
Type of product:
Relays
PLM
Product phase:
Phase-Out
Logistics
Dimensions (cm):
9,00 x 14,60 x 13,20
Weight:
0.76kg
Commodity Code:
85364900
Export Control Regulations (ECCN):
N
EAN:
4011209564565
When you choose JCertified refurbished electronics, you save on water, raw materials, and CO₂ needed for the production of new electronics. Check below to see exactly how much you save with this specific refurbished product:
CO2 eq
-72%
Resource use minerals and metals
-95%
Water use
-83%
Can I buy on account at JC-Electronics?
Yes, under certain conditions. Contact the Sales team via [email protected] for more information.
Why should I choose JC-Electronics?
You can rely on a stock of 300,000 pieces of industrial electronics from leading top-quality brands, both new and refurbished. Therefore, you can also find drives, PLCs, HMIs, and industrial PCs that are no longer produced with us. You always get a 2-year warranty. Additionally, refurbished products are circular, helping you reduce your ecological footprint.  Good to know: New products and tested refurbished products ordered before 16:00 CET are shipped the same day.
Why can I trust refurbished electronics from JC-Electronics?
All products are thoroughly cleaned, defects are repaired, and weak elements are proactively replaced. If they pass the endurance test, the products can be sold. You can recognize them by the JCertified warranty seal. The entire process has received the RecQ quality mark from DEKRA and the ISO14001:2015 certificate
How much warranty do I get on a product?
You always get a 2-year warranty on products, both refurbished and new. This is twice as much as the standard factory warranty from many manufacturers.
Are all products available from stock immediately?
New and tested refurbished products from our stock are always available immediately. Untested and non-refurbished products undergo a thorough refurbishment and an extensive testing procedure before shipment.
Can I order products urgently?
Yes, you can. New and refurbished products that are ready for shipment will be dispatched the same day if the order is received before 16:00 CET. An express shipment to the Netherlands, Belgium, Luxembourg, Germany, Austria, Switzerland, France, or Italy will arrive the next day. An express shipment to other countries in the European Union takes 2 days. An express shipment to countries outside the European Union takes 3 days. 
Can I have products repaired urgently?
 Yes, you can. With an urgent repair, your product will be repaired within 3 working days. Contact the Sales team via [email protected] for this.
Why should I buy refurbished electronics?
There are several reasons to purchase a refurbished product. For example, because electronics are no longer made and are hard to get new. But also because refurbished is a sustainable choice, reducing your organization's ecological footprint. Whatever the reason, you always get a 2-year warranty on both refurbished and new electronics at JC-Electronics.