ELK M1XSP Lighting/Thermostat Interface, Serial Port Expander

Streamline integration of lighting and HVAC into your security and automation projects with the ELK Products M1XSP Lighting/Thermostat Interface — a compact serial port expander for M1 alarm control systems. The M1XSP converts the M1 keypad RS-485 data bus to RS-232-compatible ports, enabling remote placement of thermostats and serial lighting controllers while maintaining reliable monitoring and control. With an adjustable baud rate range of 300–38,400 and support for up to seven M1XSP units on M1 Gold and M1EZ8 panels, the unit scales to meet commercial and multi-zone residential needs.

Installers can adapt communicating thermostats (RCS, Aprilaire, HAI) and a variety of lighting control products (OnQ-ALC, PCS-UPB, Centralite) without complex rewiring or custom gateways, saving labor and reducing on-site troubleshooting. The M1XSP ships with cable and a black surface-mount housing for neat, code-friendly installations. Designed for security integrators and IT professionals, it maintains robust integration with alarm, surveillance, and building management systems while being RoHS compliant.

Add the ELK M1XSP to your next monitoring, HVAC, or lighting automation deployment to simplify wiring, expand device compatibility, and speed project completion.

• Simplifies integration of HVAC thermostats and serial lighting controllers into M1 alarm systems, reducing installation time and complexity
• Extends RS-232 communications over the M1 RS-485 keypad bus for long-distance device placement and reliable monitoring
• Scalable solution: M1 Gold and M1EZ8 support up to 7 M1XSP units for larger commercial or multi-zone projects
• Flexible communications with adjustable baud rates from 300 to 38,400 baud to match diverse serial devices and protocols
• Ships complete with cable and a black surface-mount housing for clean, professional installations and faster deployment