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    ELK-AERF9 — Two-Way Wireless Transceiver for E27 Installation Guide

    September 08, 2026 3 min read

    Installation instructions for the ELK-AERF9 Two-Way Wireless Transceiver — adds ELK two-way wireless sensor support to the E27 Alarm Engine.

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

    Installation instructions for the ELK-AERF9 Two-Way Wireless Transceiver — an add-on RF receiver/transmitter that gives the ELK E27 Alarm Engine support for ELK's two-way wireless sensor line.

    Overview / Application

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

    Specifications

    Wireless Zone Capacity 128
    Operating Frequency 902 MHz to 928 MHz
    Current Draw 35mA receiving, 85mA transmitting

    Features and specifications are subject to change without notice.

    Installation Instructions

    Before installing the wireless transceiver, 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 wireless transceiver with the 6-pin female connector on the E27 board or AEXRFA adapter. Ensure the AERF9 is fully seated into the connector.
    3. Install the 3 provided screws through the AERF9 into the screw studs on the E27 board or AEXRFA adapter.
    4. The supplied antenna is intended for use when the AERF9 is installed on the E27 main board — it will extend out through the top of the enclosure. Remove the antenna knockout in the top of the enclosure, then install the antenna in the ANT screw terminal in the upper left corner of the AERF9.

    The AERF9 must be enabled in the E27 system using the ElkConnect App. If the AERF9 is connected to the main board, go to System Settings and enable "On-board RF Receiver." If connected to the AEXRFA adapter, go to Bus Devices and enroll the AEXRFA.

    LED Indicators

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

    Limited Warranty

    The ELK-AERF9 is warranted to be free from defects in material and workmanship for 2 years from date of manufacture. Elk makes no warranty, express or implied, including merchantability or fitness for a particular purpose, regarding batteries used with wireless devices. Refer to Elk's website for the full warranty statement.

    FCC / IC Compliance

    This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that it must accept any interference received. This transmitter must be installed to provide a separation distance of at least 20cm from all persons, and must not be co-located or operated in conjunction with any other antenna or transmitter except those approved for co-location per multi-transmitter guidelines. FCC ID: TMA-E27RF9, IC: 4353A-E27RF9. Model: ELK-E27RF9 Two-Way Wireless Transceiver.

    Manufacturer

    Elk Products, PO Box 100, 3266 US Hwy 70 West, Hildebran, NC 28637. Phone: 828-397-4200. www.elkproducts.com. Document L696, 11/10/2023.