1 year warranty
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The Siemens 3TK2845-2HB40 is a SIRIUS multifunction safety relay from the 3TK28 series, designed to evaluate signals from emergency-stop devices, protective doors, light grids, and other safety sensors in industrial machinery. The -2HB40 variant features two sensor inputs (S1 with monitored start-up, S2 with automatic start-up), one cascading input (CAS/OS), and a key-operated switch input for standard/maintenance operation. Output circuits include two relay and two electronic enabling circuits plus an electronic signaling output, supporting safe shutdown with instantaneous switching. The unit uses spring-loaded terminal connections for fast, vibration-resistant wiring and operates on 24 V DC. It is certified for use up to PL e per EN ISO 13849-1 and SIL 3 per IEC 61508/62061, making it suitable for category-4 safety circuits in machine-tool, conveyor, and protective-door applications.
Item Details
- Brand Name: Siemens
- Manufacturer: Siemens AG
- Item Type Name: SIRIUS Safety Relay (Multifunction Device)
- Product Family / Series: SIRIUS 3TK28 Safety Relays
- Product Series: 3TK2845 Multifunction Device
- Variant Function: "Automatic and monitored start" (HB variant)
Product Specifications
- rated_control_supply_voltage: 24 V DC
- connection_type: Spring-loaded (cage clamp) terminals
- sensor_inputs: 2 (S1 monitored start-up, S2 automatic start-up)
- cascading_input: 1 (CAS/OS)
- switching_input: Key-operated switch (standard/maintenance)
- enabling_circuits: 2 relay + 2 electronic enabling circuits
- signaling_output: 1 electronic signaling output
- time_delay: Instantaneous (no delay)
- max_safety_integrity_level: SIL 3 per IEC 61508 / IEC 62061
- max_performance_level: PL e per EN ISO 13849-1
- safety_category: Up to Category 4 per EN 954-1 / EN ISO 13849-1
- device_width: 45 mm
- terminal_degree_of_protection: IP20 per EN 60529
- applicable_standards: EN 418 (E-STOP), EN 60204-1 (machine safety)
Additional Details
- Manufacturer Country: Germany
- Mounting: 35 mm DIN rail snap-on or screw mounting
- Device Type: Basic unit / multifunction safety relay
Measurements
- Weight: 0.350 kg
- Width: 45 mm
All PLC Direct products come with a 1-year warranty. The warranty is issued by PLC Direct. Warranty coverage commences at the date of purchase. The warranty is for mechanical defects or failures not caused by human factors including but not limited to (a) incorrect installation, (b) operating the unit in sub-optimal conditions or in scenarios not recommended by the manufacturer, (c) poor unit maintenance, etc. The warranty does not cover programming or software related issues.
If the product is eligible for PLC Direct’s warranty coverage and the customer encounters an issue with the product, we will request the item is shipped to us for diagnosis and examination. Regardless of the cause of product issues, the customer will bear responsibility for the cost of shipping the unit to PLC Direct for evaluation. Where the unit was damaged by human factors, we will offer a repair or replace quote; in cases where damage was caused by human factors, the customer is responsible for the cost of shipping the repaired/replaced unit from PLC Direct to the customer. Where the unit was not damaged by human factors but is covered by PLC Direct’s warranty, we will repair or replace the unit at our cost (or, in rare cases, refund you your purchase); in such cases, PLC Direct will bear the cost of shipping the repaired or replaced product back to the customer. It is up to PLC Direct’s discretion whether to repair, replace, or refund the customer in such cases. Diagnoses can take time to complete based on technician availability and the complexity of diagnosis.
In no event shall PLC Direct be liable for any damages except actual damages up to, but not exceeding, the amount paid to us for the product, including we shall not be liable for any consequential or indirect damages or lost profits whether or not advised of same.
PLC Direct offers free shipping worldwide. Product ship from a various warehouses worldwide based on the customer's and the product's location. The estimated delivery date on the product page is PLC Direct's best estimated assuming a US-based shipping destination.
Regardless of where the product is shipping from, PLC Direct covers all duties for US-based shipping destinations. For non-US-based shipping destinations, customers are responsible for duties as appropriate.
PLC Direct's focus is on balancing price with lead time. Some but not all products can be expedited. If you have questions about delivery ETAs, please contact our team.
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