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Elausys

KNX Gateways for Alarm Systems / JA-KNX User Manual

Hardware and compatibility

Hardware compatibility, connection diagrams and power requirements for JA-KNX.

elausys · 12 September 2026
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This interface is intended to be used with a JABLOTRON 100 series alarm system. The system must be equipped with a JA121T module for RS485 communication.

The gateway can be mounted directly inside the alarm system panel or on an external DIN-rail using the optional housing.

NOTE: When a user is logged in to service mode on the alarm system, the RS485 and KNX interface are disabled.

Connections

Elausys JA-KNX is galvanically isolated from the KNX bus, therefore the 12VDC power supply should be provided by an external power supply or from the alarm system itself, to the J121T module output and to the JA-KNX gateway.

The RS485 bus must be interconnected between the JA121T and the JA-KNX interface. The RS485 termination resistor is already integrated on the KNX interface module, therefore no additional component or wiring is required. The JA121T module must be configured at 9600 baud.

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Terminal block connection:

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Frequently Asked Questions

Which alarm interface is required?

Use Jablotron 100 through a JA-121T RS485 module.

What power supply is required?

Use a 12 VDC supply. It can be provided by the alarm system or an external supply as described in the connection instructions.

Keep exploring

Find the other guides for this product in the documentation.

Back to JA-KNX User Manual