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    ELK-AERF9 — Two-Way Wireless Transceiver for E27 Alarm Engine

    September 08, 2026 2 min read

    Installation instructions for the ELK-AERF9 Two-Way Wireless Transceiver for the E27 Alarm Engine — enables the E27 board to support Elk's two-way wireless line of sensors.

    💾 Download Original PDF 🛒 View Product
    Full text manual (for reference)

    Installation instructions for the ELK-AERF9 Two-Way Wireless Transceiver for the E27 Alarm Engine — enables the E27 board to support Elk's two-way wireless line of sensors.

    Application

    The ELK-AERF9 is a two-way wireless transceiver that allows the E27 Alarm Engine to support Elk's two-way wireless sensor line. It connects to a dedicated connector on the E27 board, or to an ELK-AEXRFA RF Data Bus Adapter, and features LED indicators for status and RF signals.

    Specifications

    Spec Value
    Wireless zone capacity 128
    Operating frequency 902–928 MHz
    Current draw 35 mA receiving, 85 mA transmitting

    Installation Steps

    Before installing, turn the E27 Master Power Switch OFF.

    1. Remove the cover from the E27 board or AEXRFA adapter, and locate the 6-pin connector and 3 screw studs in the upper corner.
    2. Carefully align the 6-pin male connector in the lower-right corner of the AERF9 with the 6-pin female connector on the E27 board or AEXRFA adapter. Ensure it's fully seated.
    3. Install the 3 provided screws through the AERF9 into the screw studs on the E27 board or AEXRFA adapter.
    4. Install one of the two included antennas: use the straight antenna when the transceiver is on the E27 board; use the offset antenna when it's on the AEXRFA adapter. Install the appropriate antenna into the ANT screw terminal in the upper-left corner of the AERF9.

    Refer to the ElkConnect app instructions for details on enabling the AERF9 within the E27 system.

    LED Indicators

    LED Meaning
    STATUS — Off No power to the unit
    STATUS — On solid Powered but not enabled with the E27, or microprocessor not functioning
    STATUS — Blinking Normal operating mode
    ENROLLED RF Flashes when a signal packet from a valid (enrolled) device is received by the E27
    ALL RF Flashes on any transmission detected on the AERF9's frequency

    FCC / IC Compliance

    Complies with Part 15 of the FCC Rules and Innovation, Science and Economic Development Canada's licence-exempt RSS standards. Must maintain a separation distance of at least 20cm from all persons and must not be co-located with other antennas/transmitters except as approved for multi-transmitter guidelines. Model designation: ELK-E27RF9. FCC ID: TMA-E27RF9. IC: 4353A-E27RF9.

    Limited Warranty

    The ELK-AERF9 is warranted free from defects and workmanship for 2 years from date of manufacture. Elk makes no warranty regarding batteries used with wireless devices. See Elk's website for full warranty details.

    Elk Products — PO Box 100, 3266 US Hwy 70 West, Hildebran, NC 28637 · 828-397-4200 · elkproducts.com