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  • ELK-M1XRF319 β€” Wireless Receiver and Input Expander Installation Manual

    August 31, 2026 7 min read

    Installation manual for the ELK-M1XRF319 Wireless Receiver and Input Expander for 319.5MHz Interlogix-protocol transmitters.

    Full text manual (for reference)

    Installation manual for the ELK-M1XRF319 Wireless Receiver and Input Expander β€” adds up to 144 wireless transmitters (zones/sensors) operating on the 319.5MHz frequency and adhering to the Interlogix protocol to an ELK M1 Control.

    Overview

    The ELK-M1XRF319 allows wireless transmitters operating on the 319.5MHz frequency (and adhering to the Interlogix protocol) to work with ELK-M1 Controls. The receiver connects to the M1's RS-485 4-wire data bus and integrates much like a hardwired zone expander. It can be installed remotely from the control anywhere inside the premises, up to the maximum allowed distance of the data bus. One receiver can cover an average-size home and up to 144 wireless transmitters. All transmitter programming and enrollment data is stored in the M1 Control, not in the receiver β€” so up to 9 total receivers can be connected for extremely large coverage areas without needing to relearn transmitters.

    Important: Elk offers two other Wireless Receiver models for the M1 Control, each on a different frequency. The frequency and protocol of each transmitter must be matched with a receiver compatible with that same frequency/protocol. Mixed receivers/transmitters are possible on the same installation as long as each transmitter is within range of the receiver matching its frequency/protocol.

    Features

    • Adds up to 144 individual wireless transmitters (zones/sensors)
    • Operates from the 4-wire RS-485 Data Bus
    • Multiple receivers (max. 9) may be connected to a single M1 or M1EZ8 Control for redundancy and greater coverage
    • Compatible with wireless transmitters operating on the 319.5MHz frequency and adhering to the Interlogix protocol

    Specifications

    Sensitivity >105 dBm
    Operating Temperature 0 to +120Β°F
    Operating Voltage 12VDC
    Current Draw 52mA
    Indoor Range 300–500 ft. (line of sight; walls/metal reduce actual range)

    Installation and Setup

    Process: Mount unit β†’ Connect wiring β†’ Set address β†’ Perform bus enrollment.

    1. Mounting β€” never mount inside a metal enclosure or on a metalized surface. Stay at least 10 feet from any electrical device that might generate noise and reduce sensitivity. Attach with two #6 x Β½" screws. For increased coverage, up to 9 receivers may be connected to the same M1 Controller.
    2. Wiring Connections β€” turn Control power OFF before wiring. Connect terminals +12V, A, B, and CMN (–Neg) from the receiver to the M1's Data Bus (terminals +VKP, Data A, Data B, & Neg). If this receiver is the LAST device on the data bus, connect a 120 Ohm resistor (included) across terminals A and B β€” the last device on the bus MUST include bus termination.
    3. Antenna Installation β€” the receiver includes two antennas; install them in the top locations marked "Antenna." Dual antennas ensure signal diversity to help eliminate RF dead spots. Be sure to insert and tighten antennas into the terminals marked ANTENNA (the adjacent terminal is not used).

    Setting the Data Bus Address

    The Data Bus Address is set via Address Programming mode using the Forward and Backward pushbuttons, displayed in binary on the ADDRESS LEDs (values 8, 4, 2, 1 β€” add together the lit LEDs). Factory default address is 3.

    1. Press the Forward and Backward buttons together at the exact same time to enter Program mode (may require practice).
    2. The STATUS LED should turn ON and stay solid. Repeat step 1 if it doesn't.
    3. With STATUS ON, press Forward or Backward to modify the Address setting.
    4. Once the desired Address displays, press Forward and Backward together again to EXIT Program mode β€” the address stores in non-volatile memory.
    5. Verify the STATUS LED turns OFF and the Address LEDs still show the desired value. Caution: incorrect button presses may change the Address before/during exit β€” repeat earlier steps if needed.
    6. Perform a Data Bus Enrollment (see below) β€” this is critical.
    7. The BUS LED should start blinking once the receiver is properly set and enrolled.

    Avoiding Data Bus Address Conflicts

    Wireless Receivers and Hardwired Expanders (M1XIN) share the same bus and device type, so conflicts are possible. Key rules:

    • Hardwired Expanders are limited to 16 hardwired zones each; their Data Bus Address sets the starting zone (Address 2 β†’ Zone 17, Address 3 β†’ Zone 33, etc.).
    • A single Wireless Receiver can handle up to 144 transmitter/zones β€” to use the full 144, the receiver must be set to Address 2 so the first wireless zone is 017 (wireless zones can only occupy Zone 017–160).
    • We recommend installing all wireless expanded zones in the lower range starting at zone 017, and hardwired expanded zones at the higher end.
    • Never assign a Wireless Receiver and a Hardwired Expander to the same Data Bus Address.
    • Never assign a Hardwired Expander to any Address that correlates to wireless transmitter/zones already in use.
    • Never learn a new wireless transmitter that spills into a data bus address assigned to a Hardwired Expander.
    • Keep wireless transmitter zones contiguous, never split by hardwired expanded zones.
    • Maximum wireless zones is 144, and the last wireless zone number cannot exceed 160.

    Full data bus address / zone number tables (Appendix A) and example zone configurations (Appendix B, covering all-hardwired, mixed hardwired+wireless, and redundant-receiver setups) are in the full PDF for detailed planning of larger installations.

    Data Bus Enrollment (Required Step)

    After setting the address and powering up the receiver, it must be manually enrolled with the M1 Control via keypad "Menu 1 – Bus Module Enrollment" or ElkRP Remote Programming Software. From an M1 LCD Keypad:

    1. Press ELK, then 9 (or scroll up) for "9 – Installation Programming." Press the RIGHT arrow to select. Enter the Installer Program Code (default: 172839).
    2. The first Installer Programming menu shown is "Bus Module Enrollment."
    3. Press RIGHT to select β€” "Enrolling Bus Modules" displays, then the control transmits an enrollment message to all bus devices and shows the total enrolled Bus Modules. Press RIGHT next to "Edit" to view/remove devices.
    4. Press * or Exit to leave Installer Programming.

    Operation

    When the Wireless Receiver detects a sensor transmission, it's passed to the M1 Control for processing. The M1 quickly scans a filter of valid enrolled sensors; if an additional receiver picks up the same transmission, the M1 disregards the duplicate.

    Diagnostic LEDs

    BUS Blinks to indicate the receiver is enrolled on the Data Bus.
    UC Blinks once every ~3 seconds to indicate the receiver processor is functioning normally.
    RX Flashes whenever an RF transmission is detected.
    TX Not used.
    Freq. Should blink 1x every 3 seconds when set to 319.5MHz. If blinking 2x every 3 seconds, the receiver is on the wrong frequency β€” press and hold the ENTER button for 3 seconds to toggle it back to the correct 319.5MHz setting.

    Transmitter (RF) Level Checking

    Wireless transmitters send multiple repeated data packets to compensate for interference or weak signal. During keypad Walk Test mode, the M1 announces the received packet count via Voice Output (e.g. "Sensor X, Level 8" for the strongest signal β€” all 8 of 8 packets received). Elk recommends a minimum acceptable level of 3 or 4, since the receiver requires at least 2 repeated packets to qualify a valid transmission. If an announced level seems unusually high, retest β€” packets could be arriving from multiple sensors transmitting around the same time.

    Compatible Transmitters

    The manual includes detailed compatibility tables for Elk-brand 319.5MHz transmitters (ELK-319DWM Door/Window Mini, ELK-319DG All Weather Door & Gate, ELK-319DR Recessed Door, ELK-319WS Window Reed & Shock Combo, ELK-319KF4 Four Button Keyfob, ELK-319KF1/PB1 Panic Buttons, ELK-319HRR Heat Rate of Rise Detector, ELK-319PIRC Ceiling Mount PIR, plus upcoming Smoke/CO/Wall PIR/Glassbreak/Water Flood detectors), Interlogix brand compatible transmitters, and Resolution brand compatible transmitters β€” each with specific enrollment process, Option 1/2 settings, and Loop # settings. Elk does not guarantee compatibility for any model not explicitly listed, since manufacturers may discontinue or alter models.

    Programming via Keypad

    Press ELK then 9 for Installer Level Programming, enter the Installer Program Code (default 172839), then navigate to "Wireless Setup – Menu 14." Four submenus:

    1. 1: Receiver Options β€” sets supervision timeouts: RO3 (Regular Supervision, Type 1 non-fire zones, default 024 hrs, range 001–255), RO4 (Fire Supervision, Type 3 zones, default 004 hrs), RO5 (UL Wireless Jam β€” not applicable to this model, leave as "No").
    2. 2: Transmitter Options β€” per-zone settings including Enable Transmitter, Supervision Type (0=non-supervised for keyfobs/sensors that leave the building, 1=Normal/Burglar default, 3=Fire), Enable Option 1 / Option 2 (transmitter-specific β€” see compatibility tables), Keyfob User ID (001–255, appears in event log for arm/disarm via keyfob), and PIR Auto Restore (not currently used β€” wireless PIRs are not recommended for automation/occupancy applications since they sleep after one detection to conserve battery).
    3. 3: Learn (Wireless Transmitter Enroll) β€” select a wireless zone location (enter 3-digit zone number or scroll), press RIGHT to program, then follow the sensor's specific enroll process (usually inserting the battery or pressing the tamper button). Successful enrollment displays the TXID and the keypad chimes. Rapid Enroll auto-advances to the next zone for sequential enrollment. Press ELK twice to exit. Also used to set the Loop # (critical β€” follow the compatible transmitter chart) and to delete a transmitter (set "Enable Transmitter" to "No," or set Loop to 0).
    4. 4: Keyfob Event Definitions β€” programs the action each keyfob button (Key 1–8) performs, using a 4-digit event code from the M1 Zone Definitions table (range 0000–0030). Default: Key 1/Lock = Event 0027 (KeyMomAway/Arm), Key 2/Unlock = Event 0029 (KeyMomDisarm/Disarm), Keys 3 & 4 have no default function. Pressing Lock+Unlock together triggers Key 7; pressing Light+Asterisk together triggers Key 8 (both default to "no function" until assigned). Many 4-button keyfobs support Option 1 to remap keys 1–4 to keys 5–8, useful when two people want different event functions from their own keyfobs.

    Multiple Redundant Receivers

    Once the first Wireless Receiver is installed and operational, additional receivers can be added for redundancy or improved coverage/range. Each additional receiver needs its own unique data bus address (any unused address from 2–10; addresses 11–16 cannot be used) and must be separately enrolled for proper supervision. Loss of any enrolled bus device triggers a Missing Bus Device Trouble. Up to 9 total wireless receivers can be installed on a single M1 Control, provided none of those addresses are used by a Hardwired Expander. Note: a redundant receiver does not increase the number of wireless zones β€” it only increases range/coverage.