The Honeywell 2MLR‑DBST, also cataloged as the 2MLR‑DBST expansion driver module, operates as the primary TP/CAT5 electrical interface for extension‑base communication in 2MLRCPUH/T and 2MLRCPUH/F systems. It provides deterministic electrical signaling, station addressing, and loader connectivity through the CPU0 connector of the extension base.
Hardware Specifications
Parameter
Specification
Model
2MLR-DBST
Brand
Honeywell
Origin
USA
Weight
100 g (shipping weight 1.5 kg)
Core Performance Indicators
Electrical TP/CAT5 media, 100 m max electrical extension distance, USB loader connection, station range 1–31, CPU0 installation position
Electrical TP/CAT5 Interface & Backplane Behavior
The module uses electrical TP/CAT5 media for extension‑base communication, supporting a maximum distance of 100 m between bases. Station numbering is restricted to 1 through 31, with any value outside this range generating an error. The loader connection is provided through an extension‑drive USB interface. Installation is fixed at the CPU0 connector within the extension base, ensuring correct alignment with the system backplane.
Frequently Asked Questions
Q: Can the 2MLR‑DBST be installed in any slot of the extension base A: No. It must be installed at the CPU0 connector position.
Q: What happens if a station number outside 1–31 is assigned A: The system flags an error and prevents initialization of the extension link.
Q: Does the module support optical media A: No. The 2MLR‑DBST uses electrical TP/CAT5 only.
Field Installation Guidelines
Maintain cable routing away from high‑current conductors to reduce electrical noise. Ensure CAT5 connectors are fully seated and free of contamination. Verify station numbering before energizing the extension base. When using USB loader connections, avoid sharp cable bends to maintain signal integrity. Confirm correct mechanical engagement with the CPU0 connector to prevent intermittent communication.
