Key Features:

• Multi-Branch Bus Distribution: Splits one M1 RS-485 data bus output into 4 managed bus branches, each branch accommodating up to two parallel home-run cables (8 total)
• EOL Supervision on Branches: Built-in end-of-line termination on each branch for clean signals and supervised wiring – prevents reflection or noise on long cable runs
• Retrofit-Friendly: Ideal for converting systems with star-wired keypads (e.g. older Ademco or DSC) to the M1 – eliminates need to re-pull new daisy-chain cable
  
• Expandable: Two M1DBHR hubs can be used in parallel on the M1 bus if even more branches are required (wired to the M1 data bus in parallel)
• Easy Installation: Compact PCB with clearly labeled screw terminals for IN and OUT connections; includes standoffs or mounting rails for ELK SWB series enclosures

Technical Specifications:

• Data Bus: RS-485, 4-wire (A, B, +12V, GND) – one input from M1, 4 managed outputs (each with dual parallel terminals)
  
• Power Requirement: 12V DC (from M1 aux power); very low current draw (minimal electronics since mostly signal repeaters)
  
• Dimensions: ~4.9″ × 2.75″ circuit board (fits inside M1 enclosure using provided mounting glides)
  
• Included Hardware: ELK-SWG glides for easy mounting in enclosure; instruction sheet with wiring diagram
• Usage Note: When using the M1DBHR, all branch cable ends must connect to the hub (no daisy-chaining on branches). Proper termination jumpers on the hub must be set per the manual for reliable operation.