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

    September 08, 2026 2 min read

    Complete installation instructions for the ELK-AERF3 319.5 MHz Wireless Receiver, which enables an E27 Alarm Engine to support ELK's 319.5MHz wireless sensor line (up to 128 zones).

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    Full text manual (for reference)

    Installation instructions for the ELK-AERF3 319.5 MHz Wireless Receiver — a one-way wireless receiver that enables the E27 Alarm Engine to support ELK's 319.5MHz wireless sensor line, supporting up to 128 wireless zones.

    Application

    The ELK-AERF3 is a one-way wireless receiver that allows the E27 Alarm Engine to support ELK's 319.5MHz wireless line of sensors. This receiver can be connected 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 signals.

    Specifications

    Wireless Zone Capacity 128
    Operating Frequency 319.5 MHz
    Current Draw 52 mA
    Warranty 2 years from date of manufacture

    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 provided screws through the AERF3 wireless receiver into the screw studs located on the E27 board or AEXRFA adapter.
    4. The supplied antenna is intended for use when the AERF3 is installed on the E27 main board. The antenna extends out of the top of the enclosure — remove the antenna knockout in the top of the enclosure, then install the antenna in the ANT screw terminal located in the upper left corner of the AERF3 wireless receiver.
    5. The AERF3 must be enabled in the E27 system using the ElkConnect App. If the AERF3 is connected to the main board, go to System Settings and enable "On-board RF Receiver." If the AERF3 is connected to the AEXRFA adapter, go to Bus Devices and enroll the AEXRFA.

    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 by the AERF3 receiver
    TX Flashes when data is transmitted from the AERF3 receiver to the E27

    Note: SW1 and SW2 switches on the board are reserved for future use.

    Warranty & Compliance

    The ELK-AERF3 Wireless Receiver is warranted to be free from defects in materials and workmanship for a period of 2 years from date of manufacture. Elk makes no warranty, express or implied, including merchantability or fitness for a particular purpose, with regard to batteries used with wireless devices. Refer to Elk's website for the full warranty statement.

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