Check the listing for details. Elk M1 EZ8 Main Serial Interface (ELK-M1EZ8MSI). Color: N/A, Condition: New. Listed at 40.00 USD. Elk M1 EZ8 Main Serial Interface (ELK-M1EZ8MSI). The ELK-M1EZ8MSI Main Serial Port Interface allows direct RS-232 Serial Communications to an M1EZ8 Control for Upload/Download programming, and for interfacing with other Computer type devices. Also required when adding the M1XEP Ethernet Port to an M1EZ8 Control. The speed of this port is software selectable from 300 to 115,200 baud. Adds A High Speed RS-232 Serial Port To Any M1EZ8 Control Allows Computers And Other Serial Devices To Communicate With The M1EZ8 Control Self-Powered From The Control Modular Connectors For Long Term Reliability Powerline Lighting Pass-through Connector For PSC-05 (or equiv.) Interface Technical Details Manufacturer Part #: ELK-M1EZ8MSI UPC: 762158550348 Gold Plated RJ45 8-Wire Modular Connectors DB9F Female 9-Pin RS-232 Serial Connector Operating Voltage: 12 Volts D.C. Current Draw: Less Than 5mA Housing Dimensions: 4.375" x 3.0" x 1.125" Circuit Board Dimensions: 3.5" x 2.75