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ALARM ENGINE CONTROLS & ACCESSORIES
C. ELK-AERF9
Alarm Engine Two-Way Wireless Transceiver
A Two-Way wireless transceiver that allows the E27 Alarm Engine to support ELK’s Two-Way wireless line of sensors. This 
transceiver connects to a dedicated connector on the E27 or to the ELK-AEXRFA RF Bus Adapter.  It features LED indicators for 
status and RF signals.  See compatible sensors on pages 40-43.
•	 Wireless Capacity:  128 Sensors + 16 Keychain 
Remotes
•	 Operating Frequency: 902 to 928 MHz
•	 Size: 2.38" x 2" x 1"
•	 Current Draw: 35mA receiving,  
85mA transmitting
•	 RoHS Compliant
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62158 57007
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B. ELK-AERF3
Alarm Engine 319.5 MHz Wireless Receiver
A one-way wireless receiver that allows the E27 Alarm Engine to support ELK’s 319.5 MHz wireless line of sensors. This receiver 
connects to a dedicated connector on the E27 board. It features LED indicators for status and RF signals.  See compatible 
sensors on pages 44-47.
•	 Wireless Capacity:  128 Sensors + 16 Keychain 
Remotes
•	 Operating Frequency: 319.5 MHz
•	 Size: 2.38" x 2" x 1"
•	 Current Draw: 52mA 
•	 RoHS Compliant
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62158 57008
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C&D. ELK-AEXRFA9
Two-Way Wireless Transceiver with  
Alarm Engine Bus Adapter
The ELK-AEXRFA9 is a kit that consists of the ELK-AERF9 Alarm Engine Two-Way Wireless Transceiver and the ELK-AEXRFA 
Alarm Engine Bus Adapter for RF Receiver.
•	 Allows the Alarm Engine to support Two-Way wireless 
sensors over the data bus
•	 ELK-AERF9 connects to the ELK-AEXRFA
•	 ELK-AEXRFA connects to the data bus of  the E27 
control board
•	 Operating Power: 12 VDC
•	 Current draw: 112mA
•	 Board Size: 3.5" x 3.94" x 0.56"
•	 Housing Size: 4.25" x 6.36" x 2.13"
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62158 57011
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B&D. ELK-AEXRFA3
319.5 MHz RF Receiver with Alarm Engine Bus Adapter
The ELK-AEXRFA3 is a kit that consists of the ELK-AERF3 Alarm Engine 319.5 MHz Wireless Receiver and the ELK-AEXRFA 
Alarm Engine Bus Adapter for RF Receiver
•	 Allows the Alarm Engine to support 319.5 MHz 
wireless sensors over the data bus
•	 ELK-AERF3 connects to the ELK-AEXRFA
•	 ELK-AEXRFA connects to the data bus of the E27 
control board 
•	 Operating Power: 12 VDC
•	 Current draw: 79mA
•	 Board Size: 3.5" x 3.94" x 0.56"
•	 Housing Size: 4.25" x 6.36" x 2.13"
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D. ELK-AEXRFA
Alarm Engine Bus Adapter for RF Receiver/Transceiver
The ELK-AEXRFA is an adapter for connecting an Alarm Engine RF receiver/transceiver to the Alarm 
Engine RS-485 data bus. It accepts an ELK-AERF3 319.5 MHz receiver, ELK-AERF3H 345 MHz receiver, 
or ELK-AERF9 Two-Way transceiver. Up to 4 AEXRFA adapters may be connected to the data bus.
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