Siemens QLCDM024DCBAN 16809-41/5 Discrete Module – Obsolete Quadlog Spare Part

Technical Dossier

Product Details And Specifications

Siemens QLCDM024DCBAN 16809-41/5 Discrete Module – Obsolete Quadlog Spare Part

DriveKNMS maintains RFQ-reviewed sourcing status of the Siemens QLCDM024DCBAN 16809-41/5. This is not a catalog listing. Inventory is finite and allocated on a first-confirmed basis.

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Note: Electrical parameters such as voltage ratings, channel count, and I/O specifications are not published here to prevent misapplication. Contact our technical team with your system documentation for confirmation before ordering.

Solving the Discontinued Hardware Crisis

The Siemens Quadlog system was engineered for high-integrity safety applications where redundancy and deterministic response times are non-negotiable. Its architecture — built around tightly coupled hardware and proprietary communication protocols — means that individual modules are not interchangeable with components from successor platforms such as the Siemens SIMATIC S7-400H or third-party safety PLCs.

Condition & Reliability Assurance

Every QLCDM024DCBAN unit processed by DriveKNMS passes a structured 5-step inspection protocol before it is offered for sale:

Key Features for System Maintenance

• Drop-in replacement: The QLCDM024DCBAN installs directly into the existing Quadlog chassis backplane. No wiring modifications, no I/O remapping, no engineering change orders.
• No reprogramming required: The safety application logic resides in the controller, not the discrete module. Swapping the module does not require safety program re-download or re-validation in standard replacement scenarios.
• Avoids system migration costs: Replacing a failed module with an original spare eliminates the need for a forced migration to a modern platform — a project that typically requires 12 to 24 months of engineering effort and carries significant production risk during cutover.
• Preserves SIL certification: Using an original manufacturer part maintains the hardware configuration baseline documented in your Safety Requirements Specification, avoiding the need for a full SIL re-assessment.Sourcing status is confirmed during RFQ review. and can be shipped globally within 24 hours of order confirmation.

How do I know the unit is genuine and not counterfeit?
All units are sourced through documented supply chains. We provide traceability documentation upon request. Physical markings, board revision codes, and component date codes are verified during inspection. We do not source from unverified brokers.

Should I buy more than one unit?
For any Quadlog installation with more than five years of remaining planned service life, holding a minimum of two QLCDM024DCBAN units is a defensible maintenance strategy. The module is no longer manufactured. Secondary market availability will decrease over time as existing stocks are consumed. The cost of a second unit today is substantially lower than the cost of an emergency search in 18 months.

Can you source other Quadlog modules?
Yes. DriveKNMS specializes in obsolete and hard-to-find industrial automation components. Contact us with your full bill of materials and we will advise on availability across the Quadlog product family.