For use with the ELK-M1 Security, Automation & Phone Control System. The ELK-M1XOVR adds 16 outputs (8 voltage, 8 relays) to M1 or M1G Control. Voltages can be used to trigger low current devices (50 mA max. each). Relays are SPDT rated for 7A @ 30 VDC, 10A @ 125 VAC. Operates from 4-wire data bus. Up to 12 output expanders may be used for a total of 208 outputs. Option: Convert 8 voltage outputs to relays using M1RB Relay Board.