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Elk : M1
X10 Compatible
Lighting Control
Thermostat Control
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3-Way Interface for M1 Panel: Lights, Thermostats, and Serial Port Expander
Elk M1-XSP M1 Lighting & Thermostat Interface
Elk M1-XSP M1 Lighting & Thermostat Interface
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HAI Thermostat Connection RCS TR16/TR40 Thermostat (RS-485 format) Connection RCS TR16 Thermostat (RS-232 format) Connection
Aprilaire Thermostat Connection
Elk M1-XSP M1 Lighting & Thermostat Interface
Item# 12837
Price: $109.93
Free shipping on orders over $50 - See Details


  • Adapts M1 or M1 Gold to control communicating thermostats
  • Expands M1's or M1 Gold's communication ports to accept serial ASCII commands
  • Allows M1 or M1 Gold to control lighting products that use serial communications

Essential Info

If you rely on your M1 Gold panel for security and automation, you probably already appreciate the units' easy integration with industry standard systems and components for easy upgrades and expansion. The M1 Lighting & Thermostat Interface is a three-in-one interface/expander that adapts the M1 and M1 Gold to various lighting control products and communicating thermostats. It also acts as a serial port expander. The M1 and M1 Gold are sold separately.


What's Included

  • M1 Lighting & Thermostat Interface
  • Cable
  • Black surface-mountable housing
  • More Info

    Operating from the M1 or M1 Gold's data bus, the M1 Lighting & Thermostat Interface adapts the M1 unit to various lighting control products that use serial communications. You can also control your communicating thermostat through your M1 or M1 Gold, since this interface adapts HVAC communicating thermostats from RCS, Aprilaire and HAI to the M1 cross platform control.

    Expand your M1 or M1 Gold's RS-232 serial ports. As a serial port expander, the M1 Lighting & Thermostat Interface expands the communication ports for multiple connections to equipment that communicates using serial ASCII commands.

    Jumpers on the M1 Lighting & Thermostat Interface select the appropriate application, connection, and protocol, so hands-on control is not necessary. Best of all, the M1 Lighting & Thermostat Interface operates from the 4-wire (RS-485) M1 Keypad data bus, allowing RS-232 ports to be located long distances from the control.

    The M1 Gold supports up to seven of these interfaces, while the M1 supports one. The unit comes complete with cable and a black surface-mountable housing. Additional features include an on- board EOL bus termination jumper, flash memory for firmware updating, and an LED diagnostic indicator.



    Manufacturer Product No.:M1-XSP
    Dimensions:Housing: 4.375" x 3" x 1.125"; circuit board: 3.5" x 2.75"
    Maximum Expandable Ports:M1: 1; M1Gold: 7
    Operating Voltage:12V DC
    Current Draw:31 mA
    Communications Baud Rate:300 to 38,400 baud, adjustable

    Important notes:
    Defective exchanges for identical item within Manufacturer’s warranty period.
    Manufacturer contact information: ELK Products Inc, Tel: (800) 797-9355


    HAI Thermostat Connection  RCS TR16/TR40 Thermostat (RS-485 format) Connection  RCS TR16 Thermostat (RS-232 format) Connection  Aprilaire Thermostat Connection 
    HAI Thermostat Connection  RCS TR16/TR40 Thermostat (RS-485 format) Connection  RCS TR16 Thermostat (RS-232 format) Connection  Aprilaire Thermostat Connection 


    15 Ratings
    5 star: 53%  (8)
    4 star: 20%  (3)
    3 star: 20%  (3)
    2 star: 0%  (0)
    1 star: 7%  (1)
    Average Customer Rating
    (15 customer ratings)
    Share your thoughts with other customers
    JOSEPH C. -- crystal lake, IL   6/23/2009
    works great.
    ROBERT -- durham, CT   3/31/2008
    Some initial glitches because there is no feedback to the M1 control on errors. But I got it to work after some tweeking and it performs OK.
    JILL -- lake zurich, IL   7/26/2007
    Easy to set up and connect. I'm using this one with a HAI thermostat and am quite happy.
    BRENT -- encino, CA   5/1/2007
    Item was exactly what I though it was. It worked fine.

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