ELK M1 Series Data Bus Hub for Retrofit (Existing 4 Conductor Wiring)

The ELK Products M1 Series Data Bus Hub for Retrofit (Existing 4 Conductor Wiring) is an active RS-485 data bus hub designed specifically for retrofit security and automation installations where existing 4-conductor wiring is already in place. Commonly known as the ELK-M1DBHR, this professional-grade module allows installers to efficiently expand and manage the ELK M1 data bus infrastructure without requiring new cable runs, making it ideal for upgrading older alarm and automation systems.

Engineered for use with ELK M1 Gold and M1EZ8 systems, the M1DBHR splits the primary RS-485 data bus into four managed branches, with each branch supporting up to two parallel home run connections for a total of eight home run wiring paths. This design helps improve communication reliability, simplify wiring organization, and maintain proper data bus supervision in retrofit environments using existing keypad and expansion wiring.

The ELK M1DBHR is ideal for integrating keypads, zone expanders, output expanders, wireless receivers, thermostats, and other ELK data bus devices in homes, offices, schools, churches, and commercial buildings where structured rewiring may not be practical. Each managed branch includes termination jumper support to ensure stable RS-485 communication and proper end-of-line supervision for reliable system performance.

Designed for professional low voltage installers and security integrators, the hub features removable screw terminals for easy field wiring and includes mounting rails/glides compatible with ELK structured wiring enclosures. Unlike standard daisy-chain wiring methods, the M1DBHR provides a cleaner and more organized approach for handling multiple home run data bus connections in retrofit applications.

Key Features

• Active RS-485 data bus hub for ELK M1 Gold and M1EZ8 systems
• Designed specifically for retrofit installations using existing 4-conductor wiring
• Splits the main ELK data bus into 4 managed RS-485 branches
• Supports up to 8 total home run wiring connections
• Improves data bus reliability and communication supervision
• Works with ELK keypads, expanders, wireless receivers, and automation modules
• Removable screw terminals simplify installation and field wiring
• Includes mounting hardware for ELK structured wiring enclosures
• Ideal for residential and commercial retrofit security installations
• Professional solution for organized low voltage infrastructure management

Simplify retrofit wiring upgrades and improve ELK system communication reliability with the ELK M1 Series Data Bus Hub for Retrofit — the professional solution for managing existing 4-conductor data bus infrastructure.