The M1XSLZW is a specialized Elk-M1 serial expander for connecting an M1 Control to Z-Wave enabled devices through a Leviton VRC0P+3 Z-Wave Serial Interface. Z-Wave is a wireless, low power, "mesh" network technology widely used for automating devices such as: Lights, Thermostats, Electronic Locks, etc. Z-Wave empowers devices to be remotely controlled from across the room or across the world with benefits such as energy savings, convenience, and comfort.
The VRC0P+3 is known as a Z-Wave Secondary Controller. It must be included as a permanent member of the Z-Wave network as its job is to maintain contact with all Z-Wave devices. It communicates via RS232 to the M1XSLZW which translates the protocol into the M1 control. This allows commands to be sent and received on the Z-Wave network.
Functionally the M1XSLZW is a serial expander (RS485 to RS232) and shares the same TYPE 5 databus ID as M1XSP serial expanders. A maximum of seven (7) TYPE 5 serial expanders may be connected to an M1.
A key benefit of combining the M1XSLZW and VRC0P+3 is the ability to interface with new generation Z-Wave devices such as the electronic deadbolts and locksets from Kwikset, Yale, and Schlage. Locks require a special Security Encrypted (SE) protocol and a process called "Beaming". Both the M1XSLZW and the VRC0P+3 support these new requirements.
In general, any Z-Wave device that is compatible with the Leviton VRC0P+3 should also be compatible with the M1. However some devices may have limited functionality due to design or feature differences.