Link Module | DLM01 P 37421-4-0369-652 | ABB

Key Highlights
Manufacturer: ABB
Model Number: DLM01 P 37421-4-0369-652
Product Type: Link Module
Availability: In Stock
Condition: Original New
Country of Origin: Switzerland

Technical Specifications

The ABB DLM01 P37421-4-0369-652 Link Module is a communication interface module developed for the ABB H&B Freelance 2000 distributed control system. It serves as a communication bridge between controllers, I/O subsystems, and networked automation components, enabling reliable data transfer throughout the control architecture.

Troubleshooting & Commissioning Checklist

Physical Mounting: Ensure the module is properly seated into its designated slot and that the retaining clips or screws are fully secured for proper earthing.
Network & Cabling: Verify that all PROFIBUS or fieldbus communication cables are securely connected to the terminals and free of signal degradation.
Power Supply: Check that input power (typically 24V) to the module's terminals is stable and matches the required specifications without dips or surges

Signal & Redundancy Failures

Power & Signal Failures: Located in slot L of the rack, the DLM module includes a "Failure" LED. If it lights up red, it typically signals an undervoltage, a power-fail signal, or a loss of the 24 VDC input.
Redundancy Limits: If you are experiencing power-feed or link redundancy issues, note that the DLM 01 only features a single power supply input. To achieve power supply redundancy with dual DPW 01/02 units, you must upgrade to the DLM 02.

Technical FAQ

Q: What is the primary function of the DLM01?
A: The DLM01 acts as a crucial communication bridge in the Freelance DCS network. It handles data transmission, routing, and processes analog or digital signals between the control system and distributed field devices.

Q: What is the difference between the DLM01 and RLM01?
A: While both are fieldbus devices, the DLM01 is a core link module for Freelance 2000, whereas the RLM01 is specifically a PROFIBUS Redundancy Link Module meant for cable and master line redundancy.

Q: Can the DLM01 handle redundant power tracking?
A: The physical mounting rack or base architecture allows for standard 24V DC power distribution. It depends heavily on the corresponding backplane line filtering to withstand overvoltages and sudden drops in industrial grids.

Q: Do you supply brand-new, original parts or second-hand refurbished items?

A: Our stock consists of Original New items; all products undergo quality inspection to ensure they are fully functional.

Q: What guarantees are included with the shipment?
A: All items in stock are tested by engineers, packed in professional ESD packaging, and shipped via express logistics with a global delivery time of 24–48 hours.

Q: How long does global shipping take?
A: Stock items are typically dispatched within 24 hours. Shipments are sent via DHL or FedEx Express, taking approximately 3–5 days to reach Asia, 4–6 days to Europe and the Middle East, and usually arriving within a week in major industrial regions worldwide.

Q: If the model I need is not listed on the website, can I request a quote?
A: Yes. We hold over 200,000 SKUs of industrial spare parts in stock, and many long-tail models are not listed in full. You can send us an RFQ (Request for Quote) directly, and we will provide wholesale pricing promptly.

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