The ELK-M1DBHR is an M1 Data Bus Hub designed for installations where an M1Gold or M1EZ8 Control is retrofitting an older panel with multiple homerun, 4-conductor keypad/data wires. The ELK-M1DBHR splits the 485 data bus into 4 managed 485 branches. Each cable end is EOL terminated for accurate operation and supervision. Also known as -Elk Products, Inc. DATA BUS HUB RETROFIT M1 - EK-M1DBHR