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    ELK-AERF3 — 319.5 MHz Wireless Receiver for E27 Installation Instructions

    September 08, 2026 2 min read

    Installation instructions for the ELK-AERF3 319.5 MHz wireless receiver, which adds ELK 319.5MHz wireless sensor support to the E27 Alarm Engine.

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

    Installation instructions for the ELK-AERF3 — a one-way 319.5 MHz wireless receiver that adds support for ELK's 319.5MHz wireless sensor line to the E27 Alarm Engine.

    Application

    The ELK-AERF3 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

    Spec Value
    Wireless Zone Capacity 128
    Operating Frequency 319.5 MHz
    Current Draw 52mA

    Installation Instructions

    Before installing the wireless receiver, 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 AERF3 wireless receiver with the 6-pin female connector on the E27 board or AEXRFA adapter. Ensure the AERF3 receiver is fully seated into the connector.
    3. Install the 3 screws (provided) through the AERF3 receiver into the screw studs located on the E27 board or AEXRFA adapter.
    4. Two antennas are included: a straight antenna and an offset antenna. Use the straight antenna when the receiver is installed on the E27 board. Use the offset antenna when the receiver is installed on the AEXRFA adapter. Install the appropriate antenna in the ANT screw terminal located in the upper left corner of the AERF3 wireless receiver.

    Refer to the ElkConnect app instructions for details on enabling the AERF3 in the E27 system.

    LED Indicators

    LED Meaning
    BUS Blinks to indicate the AERF3 receiver is enabled on the E27
    UC Blinks once every ~3 seconds to indicate the AERF3 receiver processor is functioning normally
    RX Flashes when a transmission from a 319.5 wireless device is received
    TX Flashes when data is transmitted from the AERF3 receiver to the E27

    Note: SW1 and SW2 switches are for future use.

    FCC / IC Compliance

    This device complies with Part 15 of the FCC Rules and Innovation, Science and Economic Development Canada's licence-exempt RSS(s). Operation is subject to the condition that the device must accept any interference received, including interference that may cause undesired operation. FCC: 2ABBZ-EE27RF3-319  |  IC: 11817A-EE27RF3319.

    Warranty

    The ELK-AERF3 Wireless Receiver is warranted to be free from defects in materials and workmanship for a period of 2 years from the date of manufacture. Elk makes no warranty regarding batteries used with wireless devices. Refer to Elk's website for the full warranty statement.

    ELK Products, Inc. — PO Box 100, Hildebran, NC 28637 — 828-397-4200 — www.elkproducts.com